PHYSICAL CHEMISTRY

 

UDK 622.7.09                                                                                                                     

S. N. Rasulova, U. N. Ruziev, V. P. Guro,  Kh. T. Sharipov, Z. A. Nabiyeva, E. T. Safarov

COMPARISON OF THE PROCESSES OF SODA AND AMMONIA LEACHING OF THE INDUSTRIAL MOLYBDENUM PRODUCT. PART 2

Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan

Abstract. Background. Almalyk MMC JSC processes molybdenum middling cinder by leaching. The role of metal ion ligands in the leaching of valuable components from Mo-cinder has not been sufficiently studied.

Purpose: comparative characteristics of the processes of soda and ammonia leaching of molybdenum middling cinder with depressants of dissolved gold: D1 and zinc.

Methodology. The composition of the cinder samples and the solutions and cakes formed during leaching was controlled spectrometrically (ААС Perkin-Elmer 3030В, ICP-Agilent 7500 IСP). The leaching of the cinder was carried out according to soda and ammonia schemes.

Originality. According to the analysis of samples of a batch of molybdenite concentrate, a balance of the distribution of metals was compiled in a step-by-step scheme of the processing process. In order to identify losses of Au, Ag, a pilot laboratory test of the process of soda leaching of raw materials was carried out.

Findings. The comparative characteristics of PPM cinder leaching in soda and ammonia schemes with D1 depressant and zinc were studied. Leaching products have been studied.

Key words: sulfide mineral, molybdenum, gold, silver, cinder, Mo-concentrate, cake, soda, ammonia, leaching.

Highlights:

- studied soda leaching of PPM cinder;

- ammonia leaching of PPM cinder was studied;

- data on the nature of Mo-cinder leaching products were obtained.

References

1. Lodeyshchikov VV Solution of environmental problems of hydrometallurgical production of gold. "Gold mining". - Irkutsk: OAO "Irgiredmet", 2004. - No. 69 (in Russian).

2. Lodeyshchikov V.V. Opportunities and prospects for the industrial use of non-cyanic solvents of gold and silver.// Information and advertising bulletin. "Zolotodobycha". - Irkutsk: OAO "Irgiredmet", 2012. - No. 166 (in Russian).

3. TerryMcNulty. Cyanide substitutes // Mining Magazine.- Vol. 184, No. 5.- May 2001(in Russian).

4. Panchenko A.F., Lodeyshchikov V.V., Khmelnitskaya O.D. Study of non-cyanide solvents of gold and silver // Non-ferrous metals.-2001.- No 5 (in Russian)..

5. Mineev G.G., Panchenko A.F. Solvents of gold and silver in hydrometallurgy.- M.: Metallurgy, 1994. (in Russian).

6. Lodeyshchikov V.V. Technology for extracting gold and silver from refractory ores. In 2 volumes. - Irkutsk: JSC "Irgiredmet", 1999. (in Russian).

7. Belobeletskaya M.V. Extraction of gold and silver from thiocarbamide, thiocyanate and mixed thiocarbamide-thiocyanate solutions, - Abstract of the thesis. diss. Ph.D. 2004, Vladivostok. - 24 p. (in Russian).

8. Sosipatorov A.I., Panchenko G.M., Vysotin V.V., etc. Application prospects of domestic depressor reagent under carbonaceous gold-bearing ore flotation. Vestnik IGTI. Proceedings of Irkutsk State Technical University.-2018.-V.22.- No.9.-Pp.184–193. DOI: 10.21285/1814-3520-2018-9-184-193 (in Russian).

9. Naumov K.D. Theoretical and technological foundations of the precipitation of gold from cyanide solutions with coarse zinc.- Abstract of the thesis. diss. at sois us.st. Ph.D. Yekaterinburg - 2019. - 23 p. (in Russian).

10. S.N. Rasulova, V.P. Guro, H.T. Sharipov, M.A. Ibragimova, E.T.Safarov. Comparative characteristics of the processes of soda and ammonia leaching of molybdenum middling cinder. Part 1 // Uzbek. chem. and. - 2022. - No 3. - P.3-9. (in Russian).

11. S.N. Rasulova, V.P. Guro, U.N. Ruziev et al. Complex formation of chloraurates with diphenylguanidine in hydrometallurgical processes.// Republic on the topic "Actual problems of the chemistry of complex compounds". scientific-practical conference a collection of materials. - September 14-15, 2021. - P.103. (in Russian).

To cite this article:  S. N. Rasulova, U. N. Ruziev, V. P. Guro,  Kh. T. Sharipov, Z. A. Nabiyeva, E. T. Safarov. Comparison of the processes of soda and ammonia leaching of the industrial molybdenum product. Part 2 // Uzbek chemical journal. -2022. – Nr4. - Pp.3-9. 

Received: 25.04.2022; Accepted: 31.05.2022; Published: 30.06.2022

 

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UDK 544.723.21+541.145

¹I. A. Bakhromova, ¹N. T. Kattaev, ¹KH. I. Akbarov, ²O. N. Ruzimuradov

NEW GRAPHITIC CARBON NITRIDE SYNTHESIS AND PHOTOCATALYTIC PROPERTIES

¹National University of Uzbekistan named after MirzoUlugbek, e-mail: irodabaxromova1@gmail.com [1]., ²Turin Polytechnic University in Tashkent

Abstract. Background. In order to solve the problems associated with the shortage of energy resources and the environment, the use of graphitic carbon nitride (g-C₃N₄) is of particular relevance. Due to the presence of a specific structure, g-C₃N₄ exhibits photocatalytic activity in the visible light region.

Purpose. Synthesis of the oxygen-doped allotropic form of graphitic carbon nitride, study of photocatalytic degradation of methylene blue.

Methodology. The structural features of the prepared photocatalyst were studied by IR spectroscopy, SEM analysis, and diffuse reflectance spectroscopy. Changes in the concentration were controlled by the spectrophotometric method.

Originality. A new derivative (O-g-C₂N₃) of the allotropic form of graphitic carbon nitride has been synthesized. Its structural-morphological and electronic properties of O-g-C₂N₃ have been determined. The photocatalytic activity was studied. It was shown that O-g-C₂N₃ exhibits the highest activity under sunlight.

Findings. The low value of the photocatalyst band gap (2.6 eV) evidences photocatalytic activity of the synthesized new photocatalyst. As a result, O-g-C₂N₃ under visible light and sunlight photocatalytically decomposes methylene blue almost 100%.

Key words: graphitic carbon nitride, photocatalyst, degradation, methylene blue, visible light, band gap.

Highlights:

- synthesis of a new O-g-C₂N₃photocatalyst;

- the  morphology and electronic structure of the O-g-C₂N₃photocatalyst;

- degradation of methylene blue under UV and visible light.

References

1.   Hamid Saufi, et. al. "Photocatalytic Degradation of Methylene Blue from Aqueous Medium onto Perlite-Based Geopolymer"// International Journal of Chemical Engineering:-Vol.-2020.- Article ID 9498349.-7 pages. https://doi.org/10.1155/2020/9498349 [2].

2.   Ding, Z.; Chen, X.; Antonietti, M.; Wang, X. Synthesis of Transition MetalModified Carbon Nitride Polymers for Selective Hydrocarbon Oxidation //ChemSusChem.-2011.-4.- 274–281.

3.   Iwano, Y.; Kittaka, T.; Tabuchi, H.; Soukawa, M.; Kunitsugu, S.; Takarabe, K.; Itoh, K. Study of Amorphous Carbon Nitride Films Aiming at White Light Emitting Devices // Jpn. J. Appl. Phys. -2008.-47.-7842. 

4.   Wang, X.C.; Chen, X.F.; Thomas, A.; Fu, X.Z.; Antonietti, M. MetalContaining Carbon Nitride Compounds: A New Functional Organic–MetalHybrid Material // Adv. Mater.-2009.-21.-1609.

5.   Y. Zhong, Z. wang, J. Feng, S. Yan, H. Zhang, Z. Li, Z. Zou, Improvement in photocatalytic H₂ evolution over g-C₃N₄ prepared from protonated melamine, Applied Surface Science 295 (2014) 253-259. http://dx.doi.org/10.1016/j.apsusc.2014.01.008 [3]

6.   F. Chang, Y. Xie, C. Li, J. Chen, J. Luo, X. Hu, J. Shen, A facile modification of g-C₃N₄ with enhanced photocatalytic activity for degradation of methylene blue, Applied Surface Science 280 (2013) 967-974. http://dx.doi.org/10.1016/j.apsusc.2013.05.127 [4].

7.   S.C. Lee, H.O. Lintang, L. Yuliati, A Urea Precursor to Synthesize Carbon Nitride with Mesoporosityfor Enhanced Activity in the Photocatalytic Removal of Phenol, Chemistry// An Asian Journal.-7 (2012) 2139-2144. http://dx.doi.org/10.1002/asia.201200383 [5].

8.   Yang, J.; Wu, X.; Li, X.; Liu, Y.; Gao, M.; Liu, X.; Kong, L.; Yang, S.Synthesis and characterization of nitrogen-rich carbon nitride nanobelts bypyrolysis of melamine // Appl. Phys. A.-2011.-105, 161.

9.   M.B. Ansari, H. Jin, S.E. Park, Carbon dioxide augmented oxidation of aromatic alcohols over mesoporous carbon nitride as a metal free catalyst.//Catalysis Science and Technology.-3 (2013) 1261-1266. http://dx.doi.org/10.1039/c3cy20869a [6] .

10. Cao SW, Low JX, Yu JG, Jaroniec M. Polymeric photocatalysts based on graphitic carbon nitride. Adv Mater. 2015; 27: 2150–2176. doi: 10.1002/adma.201500033 PMID: 25704586  

11. Hemant K. Chitte, Narendra V. Bhat, Vasant E. Walunj, Ganesh N. Shinde; Synthesis of Polypyrrole Using Ferric Chloride (FeCl3) as Oxidant Together with Some Dopants for Use in Gas Sensors // Journal of Sensor Technology.-2011.-1.-47-56.

12. Yong-Jun Yuana,, ZhikaiShena, ShitingWua, Yibing Sub, Lang Peia, Zhenguo Jia, MingyeDinga, WangfengBaia, YifanChena,c, Zhen-Tao Yub, ZhigangZoub, Liquid exfoliation of g-C₃N₄ nanosheets to construct 2D-2D MoS₂/g-C₃N₄ photocatalyst for enhanced photocatalytic H₂ production activity, Applied Catalysis B: Environmental 246 (2019) 120–128.

13. Sidrasulieva G.B., Kattaev N.T., Akbarov Kh.I. Synthesis of nanosized graffito-like carbon nitride g-O-C₃N_x // Universum: chemistry and biology. – Moscow.-2021. - No. 12 (90). – P. 84-88. (in Russian)

To cite this article:  I. A. Bakhromova, N. T. Kattaev, KH. I.  Akbarov, O. N. Ruzimuradov. New graphitic carbon nitride synthesis and photocatalytic properties  // Uzbek chemical journal. -2022. – Nr4. - Pp.9-14. 

Received: 01.07.2022; Accepted: 01.08.2022; Published: 15.08.2022

 

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INORGANIC CHEMISTRY

 

UDK 541.123.3

G. A. Saydullaeva, M. K. Askarova, B. S. Zakirov, B. Kh. Kucharov, M. B. Eshpulatova

INVESTIGATION OF THE MUTUAL INFLUENCE OF COMPONENTS IN A WATER SYSTEM INCLUDING CALCIUM NITRATE AND MONOETHANOLAMMONIUM ACETATE

Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, ionxanruz@mail.ru [7]

Abstract. Background. Increased interest in agricultural production is enjoyed by liquid fertilizers, as well as their combined use with physiologically active substances that help accelerate the growth and development of plants and obtain high yields.

Purpose is to study the mutual influence of one of the main components of liquid fertilizer, i.e. calcium nitrate and monoethanolammonium acetate in the system: Ca(NO₃)₂-CH₃COOH∙NH₂C₂H₄OH-H₂O.

Methodology. The calcium content was determined by the volumetric complexometric method, the content of elemental nitrogen, carbon, hydrogen was carried out according to the procedure, and X-ray diffraction analysis was also applied.

Originality. It has been established that a new phase substance of calcium nitrate with monoethanolammonium Ca(NO₃)₂∙NH₂C₂H₄OH is formed in this system whose composition is confirmed by the results of X-ray diffraction and chemical analyses.

Findlings. The solubility diagram of the Ca(NO₃)₂-CH₃COOH∙NH₂C₂H₄OH-H₂O, system revealed crystallization fields: ice, four-, three-, and two-water calcium nitrate, acetic acid, monoethanolammonium acetate, and Ca(NO₃)₂∙NH₂C₂H₄OH. The results contribute to the production of a liquid fertilizer based on the complex nitric acid decomposition of dolomite and a physiologically active substance.

Key words: liquid fertilizers, dolomite decomposition, binary systems, internal sections, polythermal solubility diagram,

Highlights:

- the process of interaction of components in liquid fertilizers;

- a new phase of calcium nitrate with monoethanolammonium was obtained;

- X-ray diffraction analysis of calcium nitrate and monoethanolammonium.

References

1. Muromtsev G.S., Chkanikov D.I., Kulaeva O.N. Fundamentals of chemical regulation of plant growth and productivity.- M.: Agropromizdat, 1987.-387 p. (in Russian)

2. Nickell L.J. plant growth regulators. Application in agriculture, translation from English, -1984.-26-34 p (in Russian)

3. Saibova M.T. A complex of nitrogen and nitrogen-phosphorus fertilizers with physiologically active substances: Diss ... Doctor of Chemical Sciences - Tashkent, 1989. -351p. (in Russian)

4. Askarova M.K., Isabaev Z., Eshpulatova M.B., Makhamatova G.A., Ergashev D.A., Isabaev D.Z. Study of systems that substantiate the process of obtaining a liquid fertilizer of complex action // International Scientific Research Journal “Eurasian Union of Scientists” (ESU) .- No. 5 (62). -2019.-1 Part. -p.25-30. (in Russian)

5. Zh.S.Shukurov., Askarova M.K., S.Tukhtaev. Solubility in systems containing sodium dicarbamidochlorate, vonoethanolamine acetate, ethanol and acetamprid//Russian Journal of Inorganic Chemistry.-Moscow.- 2018.-Vol. 63.- No. 2.- Pp. 260-264 (Springer, IF-0.787).

6. Abdullaeva M. T. Obtaining liquid nitrogen fertilizers based on urea and ammonium nitrate with physiologically active substances: Abstract of ... (РhD) doc. philosophy in tech. Sciences. -Tashkent. -2018. –p.53. (in Russian)

7. Trunin A.S. Petrova D.G. Visual-polythermal method// Kuibyshev Polytechnic. Inst. - Kuibyshev.-1977.-94 p. Dep. in VINITI No. 584-78. (in Russian)

8. Kalyukova E.N. Judgmental and complexometric titration: Guidelines for laboratory work in analytical chemistry. - Ulyanovsk: Ul - GTU, 2003.-28 p. (in Russian)

9. Klimova V.A. Basic micromethods for the analysis of organic compounds.-M.: Chemistry, 1975. -224p. (in Russian)

10. Giller Ya. L. Tables of interplanar distances. -M.: Nedra, 1966. -T. 2. -330 p. (in Russian)

11. Nedoma I. Interpretation of X-ray powders. - M.: Metallurgy, 1975.-423 p. (in Russian)

12. Kirgintsev A.N., Trushnikova L.N., Lavrent'eva V.G. Solubility of inorganic substances in water. Directory. -Publishing house "Chemistry", 1972.-P. 152-154. (in Russian)

13. Zh.S.Shukurov, S.S.Ishankhodzhaev, Askarova M.K., S.Tukhtaev. Study of the Solubility of Components in the NaClO₃∙2CO(NH₂)₂-NH₂C₂H₄OH•CH₃COOH-H₂O System //Russian Journal of Inorganic Chemistry.-2011.-Vol.56.-No.3.Рp.463-466.

To cite this article: G. A. Saydullaeva, M. K. Askarova, B. S. Zakirov, B. Kh. Kucharov, M. B. Eshpulatova. Investigation of the mutual influence of components in a water system including calcium nitrate and monoethanolammonium acetate  // Uzbek chemical journal. -2022. – Nr4. - Pp.15-20. 

Received: 30.05.2022; Accepted: 29.07.2022; Published: 15.08.2022

 

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UDK 541.123.4

E. S. Khusanov, Zh. S. Shukurov, O. J. Khamidov, A. S. Togasharov

SOLUTION OF COMPONENTS IN THE CARBAMIDE ACETATE-MONOETHANOLAMINE-WATER SYSTEM

¹Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, e-mail: husanov-eldor@mail.ru [8] , ²Navoi State Mining and Technological University.

Abstract. Background. The increase in productivity is facilitated by the use of chlorate-containing defoliants, which include physiologically active substances and stimulants in their composition. For their synthesis, it was of interest to study the urea acetate-monoethanolamine-water system in a wide range of temperatures and concentrations.

Purpose: physical and chemical substantiation of the process of obtaining physiologically active substances based on carbamide acetate and monoethanolamine.

Methodology. The nitrogen content of the amide group was determined by the spectrophotometric method. The temperature was measured with thermometers TN-6 and TL-15% solution density - pycnometer (GOST 31992.1-2012); viscosity - VPZh viscometer pH - pH meter FE 20 METTLER TOLEDO.

Originality. The polythermal diagram and "composition-properties" of systems consisting of carbamide acetate, monoethanolamine and water have been studied, new compounds of the composition urea monoethanolammonium acetate have been obtained.

Findings. Based on the polytherms of binary systems and internal sections, a polythermal solubility diagram for the CH₃COOH·CO(NH₂)₂ – NH₂C₂H₄OH- H₂O systems was constructed in the temperature range from -53.0 to 20.0°C. Viscosity, density and pH of the medium of 50% systems were determined; 60%; 70% solutions of carbamide acetate with the addition of monoethanolamine.

Key words: carbamide acetate, monoethanolamine, solubility diagram, viscosity, density, medium pH, crystallization temperature.

Highlights:

- the fields of crystallization of components are delimited in the system;

- the optimal conditions for obtaining a 60% solution of urea monoethanolammonium acetate were established.

References

1. Veselova S.V., Burkhanova G.F., Nuzhnaya T.V., Maksimov I.V. The role of ethylene and cytokinins in the development of defense responses in Triticum aestivum plants infected with Septoria nodorum // Plant Physiology. -2016. -T. 63.- P. 649-660. (in Russian)

2. Tsyplenkova A.Yu., Koltsova O.V., Lobanov N.N., Ershov M.A., Skvortsov V.G. Physico-chemical systems of dicarboxylic acids, amino alcohol and water at 25 0C. // Butler messages. - 2013.-T. 36.- No. 11.-S.146-155. ROI: jbc-01/13-36-11-156. (in Russian)

3. Isaev FG The effect of ethanolamines on the yield, quality and lodging of plants. and example. chemistry. Ref. Report and message. - M.-1981.-No. 6.-P. 157-158. (in Russian)

4. Zh. S. Shukurova, E. S. Khusanova, M. Sh. Mukhitdinova, and A. S. Togasharova. Solubility of components in the aqueous system acetic acid–monoethanolamine. // Journal of Inorganic Chemistry. – M.- 2021.- no. 4.- P. 807–813. (in Russian)

5. E. S. Khusanov, Zh. S. Shukurov, and A. S. Togasharov. Solubility of components in the aqueous system H₃PO₄∙CO(NH₂)₂ – NH(C₂H₄OH)₂ – H₂O. // Uzbek chemical journal. – Tashkent.-2021.-№2. -P.8–14. (in Russian)

6. A. Sidikova, A. S. Toghasharova, J. S. Shukurova, and S. Tukhtaeva. Solubility and Rheological Properties of the System NaClO₃⋅CO(NH₂)₂–H₂SO₄⋅N(C₂H₄OH)₃–H₂O. //Russian Journal of Inorganic Chemistry. – M.-2021. -No.10.-P. 1554–1560

7. Koshkin E.I. Physiology of sustainability of agricultural crops: a textbook by E.I. Koshkin. Bustard.-2010.-P. 638. (in Russian)

8. Veselova S.V., Burkhanova G.F., Nuzhnaya T.V. et al. Effect of ethylene and reactive oxygen species on the development of the Stagonospora nodorum Berk pathogen in wheat plant tissues // Biomika.-2018.-T. 10(4).-P. 387-399.

9. Broekgaarden C., Caarls L., Vos I.A. et al. Ethylene: traffic controller on hormonal crossroads to defense // Plant Physiol.-2015.-V. 169.-p. 2371–2379. (in Russian)

10. Taverner E., Letham D., Wang J. et al. Influence of ethylene on cytokinin metabolism in relation to Petunia corolla senescence // Phytochemistry. -1999.-V.-51. P. 341–347. (in Russian)

11. Molodkin A.K., Ellert G.V., Ivanova O.M., Skotnikova G.A. On compounds of urea with acids. // Journal of Inorganic Chemistry. - M. - Science. -1967. - T. 7. - Issue. 4. - P. 947-957. (in Russian)

12. Trunin A.S. Petrova D.G. Visual-polythermal method / Kuibyshev Polytechnic. Inst. - Kuibyshev.: 1977, - 94 p. Dep. in VINITI No. 584-78. (in Russian)

13. Bazhenova L.N. Quantitative elemental analysis of organic compounds. – Yekaterinburg, 2008. – 356 p. (in Russian)

14. Zh.S.Shukurov, S.S.Ishankhodzhaev, Askarova M.K., S.Tukhtaev. Study of the Solubility of Components in the NaClO₃∙2CO(NH₂)₂-NH₂C₂H₄OH•CH₃COOH-H₂O System //Russian Journal of Inorganic Chemistry.-2011.-Vol.56.-No.3.Рp.463-466.

15. Nurakhmetov N.N., Beremzhanov B.A., Khanapin K.G. Solubility polytherm of the CO(NH₂)₂ – H₃PO₄ –H₂O system. // Journal of Applied Chemistry. - L .: Nauka, 1973. -P. 2405–2408. (in Russian)

16. Kulvir Singh, Pankaj Rathore, Gamber R. K. Impact of defoliants that contribute to the harvest on the yield of American cotton and their monetary value.// VEGETOS. -2015. - T. 28. - No. 2. -S. 41-46. (in Russian)

17. Khaidarov G.Sh. Development of defoliants based on chlorates, 2-chloroethylphosphonic acid and ethanolamines: Dis... cand.tech. Sciences. – Tashkent, 1998. -155 p. (in Russian)

To cite this article: E. S. Khusanov, Zh. S. Shukurov, O. J. Khamidov, A. S. Togasharov. Solution of components in the carbamide acetate-monoethanolamine-water system  // Uzbek chemical journal. -2022. – Nr4. - Pp.20-26. 

Received: 30.05.2022; Accepted: 25.07.2022; Published: 15.08.2022

 

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UDK 631.416.9 661.632.14

М. H. Fazilova, Sh. B. Hasanov, U. К. Аlimov, D. U. Ibragimov, C. R. Sadullaev

RHEOLOGICAL PROPERTIES OF THE MELTING OF MICROELEMENT-CONTAINING NITROGEN FERTILIZER

¹Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, e-mail: husanov-eldor@mail.ru [8],  ²Navoi State Mining and Technological University.

Abstract. Background. Ammonium nitrate serves as an agricultural fertilizer. However, it has a negative caking property due to its hygroscopicity, which causes difficulties in transportation, storage and application. Additives have been developed that improve the properties of saltpeter. The introduction of a used lithium cathode containing lithium, cobalt, manganese and nickel into the composition of ammonium nitrate, as well as the study of rheological properties, is of both scientific and practical interest.

Purpose. Study of the crystallization temperature and rheological properties of the products of mixing saltpeter melt with a polymicroelement additive.

Methodology. The rheological properties of the melt were studied by mixing ammonium nitrate (NA) with a polymicroelement additive (PMD), at a mass ratio of NA:PMD = 100:(0.5-3), at 175°C for 5 min. The density of the samples of the mixture was measured by the pycnometric method, the viscosity was measured using a VPZh-2 glass capillary viscometer in the temperature range of 165-185°C.

Originality. Data were obtained on the crystallization temperature and rheological characteristics of the melt of trace-containing ammonium nitrate in a wide range of AN:PMD mass ratios; it was shown that the addition of lithium cathode powder to the ammonium nitrate melt reduces the crystallization and melting temperatures.

Findings. It was found that with an increase in the mass fraction of lithium cathode powder from 0.5 to 3 g per 100 g of ammonium nitrate, the saltpeter crystallization temperature decreased from 160.2 to 157.3°C, which is by 4.8 and 7.7°C, as well as 2.8 and 5.7°C less than that of pure HA (T=165°C) and AS (T=163°C with the addition of 0.28% MgO, and melting is below 165°C). It is shown that at a mass ratio of ND : PMD = from 100 : 0.5 to 100 : 3 and a temperature from 165 to 185°C, the values of the density and viscosity of the melt vary within 1.4781-1.5176 g/cm³ and 6.01-5.78 cPz, respectively. The rheological properties of the melt of said mixture are suitable for pumping from one apparatus to another.

Key words: ammonium nitrate, lithium cathode powder, trace element, density, viscosity, melt, crystallization temperature.

Highlights:

- lowering the crystallization temperature of the ammonium nitrate melt;

- the effect is caused by the addition of trace elements;

- the melt of the mixture is suitable for use in industry in terms of fluidity

References

1. Volkova A.V. Mineral Fertilizer Market - 2019 / National Research University. High School of Economics. Development Center. -2019. - 52 c. (in Russian)

2. RBC. Market research. World and Russian market of mineral fertilizers // http://marketing.rbc.ru [9] (in Russian)

3. Beglov B.M., Namazov Sh.S., Reimov A.M., Seitnazarov A.R. Activation of natural phosphate raw materials. -Tashkent, 2021.- 252 p. (in Russian)

4. Chernyshov A.K., Levin B.V., Tugolukov A.V., Ogarkov A.A., Ilyin V.A. Ammonium nitrate: properties, production, application. - M.: CJSC "INFOKHIM", 2009. - 544 p. (in Russian)

5. Dibrov I.A., Nikolaev Yu.N., Borovikov V.A., Ugolkov V.L. Using thermal analysis to assess the thermodynamic parameters of the process of thermal decomposition of ammonium nitrate // ZhPKh.- 2000. - V.73. - No 6. - S. 900-905. (in Russian)

6.   Erdey Z. The thermoanalytical properties of analgrade reagents NH₄ Bolts // Talanta.-1964. - No 11. – P. 913. (in Russian)

7. Levin B.V., Sokolov A.N. Problems and technical solutions in the production of complex fertilizers based on ammonium nitrate // World of sulfur, N, P and K. - 2004. - No 2. - P. 13-21. (in Russian)

8. Tsekhanskaya Yu.V., Titova O.I., Novikova O.S., Gorelova G.K. Thermal characteristics of lime-ammonium nitrate // Chemical industry. - 1986. - No 5. - S. 283-285. (in Russian)

9.   Kiiski H. Properties of Ammonium Nitrate based fertilizers: Dissertation for the degree of doctor philosophiae. –Helsinki, 2009. – 215p.

10. Zhe  Han.  Thermal  stability  of  Ammonium  Nitrate.  Dissertation  for  the degree of doctor philosophy.-Texas:A&M University. – USA, 2016. - 210р.

11. Mikula K et al. Controlled release micronutrient fertilizers for precision agriculture – A review. Science of the Total Environment 712 (2020). doi.org/10.1016/j.scitotenv.2019.136365

12. Buligina S.Yu., Demishev L.F. etc. Trace elements in agriculture. – Dnepropetrovsk, 2007.-100c. (in Russian)

13. Meshalkina L.K., Leonova G.V. Influence of impurities on the thermal stability of ammonium nitrate // Chemical industry.-1987. - No 9. - S. 538-539. (in Russian)

14. A.S. 1129194 A1 USSR. Reducing the caking ability of granular ammonium nitrate // Fedun O.S., Smirnova L.V., Streltsov O.A. Declared 07/22/1983., Publ. 12/15/1984. B.I. 1984. - No. 46. (in Russian)

15. Scrosati, J.Hassounab, Sun, Y., 2011. Lithium-batteries. A look into the future Energy. //Environ. Sci. 4.-3287-3295.

16. The Supply and Demand Giga-Risk for Cobalt, Lithium and Graphite in Lithium-Ion Batteries, 2016. <http://investorintel.com> [10]. A.  Energy, Worldwide Rechargeable Battery Market 2015–2025, 2016 ed.<http://www.avicenne.com/> [11], 2016.

17. Chen X., Cao L., Kang D., Li J., Zhou T., Ma H. Recovery of valuable metals from mixed types of spent lithium ion batteries. Part II: Selective extraction of lithium. Waste Management 80 (2018) 198-210.

18. Kedrinsky I.A., Yakovlev V.G. Li-ion batteries. Popular science edition. - Krasnoyarsk: "Platinum", 2002.-268 p.

19. X.-H. Yue et al. Recycling phosphorus from spent LiFePO4 battery for multifunctional slow-release fertilizer preparation and simultaneous recovery of Lithium.//Chemical Engineering Journal.-426.-2021. /doi.org/10.1016/j.cej.2021.131311.

20. Thagapsu A.Yu. Lithium in rice nutrition and productivity: Author's abstract…. cand. agricultural sciences. –Krasnodar, 2008.- 22 p. (in Russian)

21. Cotton growing / A.I. Avtnomov, M.Z. Kaziev, A.I. Shleikher et al. - M: Kolos, 1983. - 224p. (in Russian)

22. Anspock P.I. Microfertilizers: Reference book. - L .: Agropromizdat, 1990. - 272 p. (in Russian)

To cite this article: М. H. Fazilova, Sh. B. Hasanov, U. К. Аlimov, D. U. Ibragimov, C. R. Sadullaev. Rheological properties of the melting of microelement-containing nitrogen fertilizer // Uzbek chemical journal. -2022. – Nr4. - Pp.26-34. 

Received: 06.07.2022; Accepted: 08.08.2022; Published: 15.08.2022

         

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UDK 66.074.3 620.193:665.511

F. M. Yusupov, V. P. Guro, Sh. J. Shamsiev, S. K. Yusupov, Zh. Kh. Kurbanov, A. A. Kucharov

EXTRACTION OF METHYLDIETHANOLAMINE FROM THE PHLEGM OF MUBAREK GAS PROCESSING PLANT

Institute of General and Inorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan

Abstract. Background. Much attention in the gas processing industry is paid to the purification of natural gas from acidic impurities - CO₂ and H₂S., which is achieved by absorption with an absorption solution based on methyldiethanolamine (MDEA). There are losses.

Purpose: Development of a method for reducing MDEA losses in the technology of natural gas purification from acidic impurities - gases: CO₂ and H₂S.

Methodology. The technological equipment of Mubarek Gas Processing Plant LLC was used, the presence of MDEA and other organic compounds in phlegm and waste water was studied (GOST R 55684-2013).

Originality. Data on the irretrievable losses of methyldiethanolamine and phlegm in the technology of gas purification from sulfur and carbon dioxide and ways to reduce them are presented.

Findings. The patterns of irretrievable losses of phlegm and methyldiethanolamine in the technology of gas purification from sulfur and carbon dioxide at the Mubarek gas processing plant are revealed.

Key words: gas processing plant, phlegm, methyldiethanolamine, wastewater.

Highlights:

- compositions of phlegm and wastewater of Mubarek Gas Processing Plant;

- a way to reduce the loss of phlegm and methyldiethanolamine.

References

1. Strizhov I.N. Gas production / I.N. Strizhov, I.E. Khodanovich. - Moscow-Izhsvsk: Institute of Computer Research, 2003. - 376 p. (in Russian)

2. Manovyan A.K. Technology of primary processing of oil and natural gas.- M.: Chemistry, 2001.-568 p. (in Russian)

3. Bekirov T.M. Primary processing of natural gases.-M.: Chemistry, 1987.-256 p. (in Russian)

4. Murin V.I. Technology of natural gas and condensate processing: a Handbook in 2 hours / V.I. Murin.- M.: OOO Nedra-Businesscenter, 2002.-4.1. 517. (in Russian)

5. Nikolaev V.V. Basic processes of physical and physical-chemical gas processing / V.V. Nikolaev, N.V. Busygina, I.G. Busygin.-M.: OAO Publishing house "Nedra", 1998.-184 p. (in Russian)

6. Mirzajanzade A.Kh. Fundamentals of gas production technology / A.Kh Mirzadzhanzade, O.L. Kuznetsov, K.S. Basniev, Z.S. Aliev.- M.: OAO Publishing House "Nedra", 2003.-880 p. (in Russian)

7. Zibert G.K. Preparation and processing of hydrocarbon gases and condensate. Technologies and equipment: Reference manual / G.K. Siebert, A.D. Sedykh Yu.A. Kashitsky, N.V. Mikhailov, V.M. Demin.-M.: OJSC Nedra-Businesscenter, 2001.-316 p. (in Russian)

8. Purification of process gases /Edited by T.A. Semenova, I.L.-M.: Chemistry, 1977.-243p. (in Russian)

9. Busygina N.V. Technology for processing natural gas and gas condensate. - Orenburg: Gazpromneft, 2002.-432 p. (in Russian)

10. Rudin M.G. Oil refiner's pocket guide / M.G. Rudin, V.E. Somov, A.S. Fomin.-M.: TsNIITEnsftshim., 2004.-336 p. (in Russian)

11. Liz S.N. Purification of industrial gases. Reference manual / S.N. Hans.-Kharkov: NPP MCP Domna, 2006.-118 p. (in Russian)

12. Miralalyuv G.F. Catalytic purification of natural gas and hydrocarbon gas emissions from the petrochemical industry from hydrogen sulfide. //Petrochemistry (RF).-Volume 45.-2005.- No 5.-S. 397-399. (in Russian)

13. Patent RU 2 626 Z67 IPC C02F1 / 72 (2006.01) Sakhabutdinov R.Z. (RU), Abramov M.A. (RU), Buslaev E.S. (RU), Method of water purification from sulfur compounds. Application: 2015155505, 12/23/2015. Registered: 07/26/2017. Submitted: 12/23/2015. Published 06/28/2017. Published: 26.07.2017 Bull. No 21. - P.1-12. (in Russian)

14. Kurbanov Zh.Kh., Guro V.P., Yusupov F.M., Shamsiev Sh.J. and other Wastewater treatment LLC "Mubarek GPP" from sulfide and organic compounds.//Uzbek.chem. j.- 2022.- No 2. - S. 21-27. (in Russian)

15. Abdurahimov M. A., Rakhmanov A. A. Modeling of the natural gas purification process in order to optimize production performance under conditions of changing parameters of the feedstock and requirements for commercial products.// Universum: technical sciences: electron. journal-2021.- 3(84). URL: https://7universum.com/ru/tech/archive/item/11421 [12]. (in Russian)

To cite this article: F. M. Yusupov, V. P. Guro, Sh. J. Shamsiev, S. K. Yusupov, Zh. Kh. Kurbanov, A. A. Kucharov. extraction of methyldiethanolamine from the phlegm of Mubarek gas processing plant // Uzbek chemical journal. -2022. – Nr4. - Pp.34-39. 

Received: 20.05.2022; Accepted: 20.06.2022; Published: 15.08.2022

         

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UDK 666.193.2.

M. N. Kazakova,  Z. R. Kadyrova

THE BASALTS DEPOSIT OF ARVATEN ARE PROMISING RAW MATERIALS FOR OBTAINING BASALT FIBER

Institute of General and Inorganic Chemistry of the AS RUz, kazakova.munira@mail.ru [13]

Abstract. Background. The development of innovative technologies for the production of construction materials, including heat-insulating materials for special purposes, is relevant.

Purpose: Study of chemical and mineralogical compositions, IR spectroscopic characteristics and determination of the module of acidity of basalts of the Arvaten deposit and determination of their suitability for obtaining mineral fiber.

Methodology. The studies were carried out using modern methods of chemical, X-ray phase and IR spectroscopic analyses.

Originality. The suitability of the basalt rock of the Arvaten deposit for the production of mineral fiber has been established. The influence of the material composition on the acidity modulus of the prototype basalt sample was determined.

Findings. The content of rock components - basalt of the Arvaten deposit - was determined. The value of its acidity modulus and the influence of the chemical composition of the basalt sample on it are determined, and the IR spectroscopic characteristics are determined. Its suitability for obtaining basalt fiber has been established.

Key words: basalt, mineral, fiber, acidity modulus, mineralogy, X-ray phase analysis, IR spectroscopy, Arvaten deposit.

Highlights:

- optimal value of the acidity modulus for basalt fiber;

- viscosity of the basalt melt upon reaching the normalized acidity modulus.

References

1. On additional measures for the accelerated development of the building materials industry. GD No 4335 dated May 23, 2019, Tashkent. (in Russian)

2. On measures for the further implementation of promising projects for the localization of the production of finished products, components and materials for 2017-2019. Decree of the President of the Republic of Uzbekistan. GD No 2698 dated December 26, 2016, Tashkent. (in Russian)

3. Decree of the President of the Republic of Uzbekistan, dated January 28, 2022 No. UP-60 On the Development Strategy of New Uzbekistan for 2022-2026. https://lex.uz [14] (in Russian)

4. On the Action Strategy for the further development of the Republic of Uzbekistan. Decree of the President of the Republic of Uzbekistan. UP No 4947 dated February 7, 2017, Tashkent. (in Russian)

5.   Niyazova Sh.M., Kadyrova Z.R., Usmanov Kh.L., Khomidov F.G. Chemical and mineralogical studies of magmatic rocks of Uzbekistan for obtaining heat-insulating materials // Glass and Ceramics. -2019.-V.75.- No.11/12.- Р.491-495.

6.   Kadyrova Z.R., Purkhanatdinov A.P., Niyazova Sh.M.  Karakalpakstan Bentonite Clays - Perspective Raw Materials for Obtaining Ceramic Heat-Insulating Materials. //International Journal of Innovative Technology and Exploring Engineering (IJITEE).- 2020.-Volume-9.- Issue-8.-P.417-420.

7. Niyazova Sh.M., Kadyrova Z.R., Khomidov F.G., Usmanov Kh.L., Eminov A.A. Physico-chemical properties of mineral fibers obtained on the basis of basalt andesite // Glass and ceramics.-2022.-Vol. 95.- No 3.-p.38-45. (in Russian)

8. Gorlov Yu.P., Merkin A.P., Ustenko A.A. Tekhnologiya teploizolyatsionnykh materialov ucheb. for universities - M .: Stroyizdat, 1980.-399s. (in Russian)

9. Lukin E.S., Andrianov N.T. Technical analysis and control of ceramic production. – M.: Stroyizdat, 1986. - P.86-94. (in Russian)

10. Botvinkin O.K., Klikovsky G.I., Manuilov L.A., Laboratory workshop on the general technology of silicates and technical analysis of building materials. - M.: Stroyizdat, 1966.-S.76-93. (in Russian)

11. Tolkachev S. S. Tables of interplanar distances. -L.: Chemistry, 1968.- P.100. (in Russian)

12. ASTM Standards Part 17, “Refractories, Glass, Ceramic Materials, Carbon and Graphite Products”.- Philadelphia.: ASTM, 2005.-Рp. 7-9, 51-61.

13. GOST 4640-93. Mineral wool. Specifications (in Russian)

14. Вuratti C. Morretti E Belloni E. Agosti F Thermal and acoustic performance evaluation of new basalt fiber insulation  panels for buildings // 6th International Building Physics Conference IBPC.Energy Procedia.-2015.-No78.-P 303-308c.

15. Tikhomirova. I.N., Skorina T.V. Influence of the silicate module of liquid glass on the properties of binders // Construction materials. - No 12.-2009. – P. 11. (in Russian)

16. Niyazova Sh.M., Kadyrova Z.R., Usmanov Kh.L., Khomidov F.G. Chemical and mineralogical studies of igneous rocks of Uzbekistan for obtaining heat-insulating materials // Glass and Ceramics.-2018.- No 12. - P.36-39. (in Russian)

To cite this article: M. N. Kazakova,  Z. R. Kadyrova. The basalts deposit of Arvaten are promising raw materials for obtaining basalt fiber // Uzbek chemical journal. -2022. – Nr4. - Pp.34-39. 

Received: 20.05.2022; Accepted: 20.06.2022; Published: 15.08.2022

         

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UDK 666.193.2/199

A. Axmadjonov, Z. R. Kadyrova

PROMISING QUARTZ SANDS OF NEW DEPOSITS OF UZBEKISTAN FOR THE PRODUCTION OF GLASS MATERIALS

Institute of General and Inorganic Chemistry of the AS RUz, axmadjonov.1988@gmail.com [15]

Abstract. Background.  Products of the glass industry of the republic are in great demand. For its uninterrupted supply of raw materials, the search for promising deposits through their exploration, production and processing of local raw materials is in demand.

Purpose. Study of the chemical and mineralogical composition, determination of the suitability of new deposits of quartz sands, including Tamdinsky, for the development of technology for glass materials for various purposes.

Methodology. Laboratory studies were carried out using modern physical and chemical methods, in particular, rational chemical, X-ray phase and microscopic analyses.

Originality. The suitability of a promising deposit of quartz sands in Uzbekistan for the production of glass materials has been determined. The phase, mineralogical and chemical composition of the Tamda quartz sands has been established.

Findings. The chemical and mineralogical composition, optical characteristics of quartz sands of the Tamdinsky deposits are determined. The main physical and chemical characteristics of various deposits of quartz sands of Uzbekistan are determined, the prospects for their further use are determined.

Key words: quartz sand, mineral, raw materials, deposits, Tamdi, chemical, mineralogical, microscopic, suitability, glass materials.

Highlights:

- suitability of a new deposit of quartz sands in Uzbekistan for the production of glass materials:

- the prospect of using quartz sands from the Tamdinskoye deposit to produce glass products.

References          

1. Goncharov Yu. I. Raw materials of the silicate industry.-M.: Publishing House of the Association of Construction Universities, 2009.-124 p. (in Russian)

2. Zakirov M.Z., Gafurdzhanov S. Quartz and quartz-feldspar sands of Uzbekistan. - Tashkent: Fan, 1983.-93 p. (in Russian)

3.   Еminov A. A., Abdullaeva R. I., Kadyrova Z. R. Dzherdanakskoe Quartz Rock for Ceramic and Refractory Materials Production // Glass Ceram.-2017.-V. 74.- No. 1-2. -P. 64–66.

4.   https://prom-glass.com [16] 

5.   https://www.mirstekla-expo.ru [17] .

6.   . Babaev Z.K., Ibragimov D.U., Karimov Sh.Kh., Kenzhaev F.D., Yadgorov A.M. State and development of the glass industry in Uzbekistan // Chemical technology. – 2018. – No 2 (47). – S. 1503. (in Russian)

7. Botvinkin O.K., Klikovsky G.I., Manuilov L.A. Laboratory workshop on general silicate technology and technical analysis of building materials. - M.: Stroyizdat, 1966. - S.76-93. (in Russian)

8. Tolkachev S. S. Tables of interplanar distances.-L .: Chemistry, 1968. - P.100. (in Russian)

9.   ASTM Standards Part 17, “Refractories, Glass, Ceramic Materials, Carbon and Graphite Products”, ASTM. –Philadelphia,2005.-Рp. 7-9, 51-61.

10. O. V. Kazmin, E. N. Belomestnova, and A. A. Ditz, Chemical technology of glass and glass-ceramics. -Tomsk: Tomsk Publishing House. polytechnic un-ta, 2011.-170 p. (in Russian)

11. Seylkhanova G.A., Ashimkhan N.S. Chemical technology of glass.-Almaty: Ed. Kazakh. un-ta, 2013. - 72 p. (in Russian)

12. GOST 22551–2019. Quartz sand, ground sandstone, quartzite and vein quartz for the glass industry.-M.: Standartinform, 2019. (in Russian)

13. Ergeshov A. M., Fimushkin L. I. Geological and economic monitoring of the state and use of the mineral resource base of non-metallic raw materials in Uzbekistan. Tashkent, 2005. - 161 p. (in Russian)

14. Babaev Z. K., Hojamberdiev M. I., Mingulova F. A., Yunusov M. Y. Properties and application potential of Uzbek quartz sands || Eigenschaften und einsatzmöglichkeiten der quarz sande Usbekistans // Keramische Zeitschrift this link is disabled.-2006.-Bd 58.-No. 1. - S. 4–6.

15. Матвеев А.И., Еремеева Н.Г., Слепцова Е.С. Исследование кварцевых песков Западно-Хомустахского месторождения на обогатимость // Горный информационно-аналитический бюллетень. -2009.- No 1. – С.121 – 126. (in Russian)

To cite this article: A. Axmadjonov, Z. R. Kadyrova. promising quartz sands of new deposits of Uzbekistan for the production of glass materials // Uzbek chemical journal. -2022. – Nr4. - Pp. 43-48. 

Received: 06.08.2022; Accepted: 08.08.2022; Published: 15.08.2022

         

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UDK 577.4(575.1)+631.6.02

N. A. Ulasheva, B. Kh. Kucharov, A. U. Erkaev, B. S. Zakirov, R. N. Kim

STUDY OF COСRISTALLIZATION OF POTASSIUM IODIDE IN CRYSTALS OF TABLE SALT USING PHYSICO-CHEMICAL METHODS OF ANALYSIS

Institute of General and Inorganic Chemistry of the AS RUz, kbx74@yandex.ru [18]

Abstract. Background. The study of the physicochemical properties of raw materials production of iodized sodium salt, the improvement of environmentally friendly technologies for its production is relevant for the republic as iodine deficiency.

Purpose: development of a technology for obtaining sustainable iodized table salt during comprehensive processing of local sulfate and chloride saline deposits.

Methodology. As the original, the cleaned brine of JSC “Kungrad Sodovaya Plant” was used. The additive of potassium iodide in the form of a saturated solution varied from 1 to 10 ml/l of the purified solution. With the achievement of a given degree of evaporation, the liquid and solid phases was divided by filtration, the fractional composition and ratio of phases was determined.

Originality. Changes in the chemical and fractional composition of products are determined depending on the technological parameters of the crystallization process, optimal conditions for its conduct in the presence of potassium iodide at a temperature of 25 are established; 60 and 100^°C, the physico-chemical and commodity properties of iodized table salt are determined;

Findings. Microscopic and X-ray phase analysis methods have found that potassium iodide crystals are obeyed, introducing into the crystal lattice of sodium chloride, which ensures the stability of iodine in gathered salt.

Key words: brine, salt, potassium iodide, crystals, steam, conditions, solution, product.

Highlights:

- a stable iodized sodium salt with 1.2-2.5% iodine was obtained;

- The output of sodium chloride is 87-90% of the content in the source.

References

1. Nabiev M.N., Osichkina R.G., Tukhtaev S. Potassium sulfate with trace elements. - Tashkent: FAN, 1988. - 165 p. (in Russian)

2. H.Ch. Mirzakulov, G.Kh. Zhuraeva. Production of sodium sulfate. Tashkent: Ed. "Navruz", 2014. -224 p. (in Russian)

3. Kucharov B.Kh., Koschonova B.T., Erkaev A.U., Toirov Z.K. Physico-chemical studies of obtaining sulfate-carbonate salts of sodium.// Uzbek chemical journal. - Tashkent. - 2017. - S. 27-33. (in Russian)

4. Erkaev A.U., Kucharov B.Kh., Reimov K.D., Kaipbergenov A.T., Bayraeva D.A. Chemical composition of coastal sediments in the western part of the large Aral Sea. // "Chemistry and chemical technology". – Tashkent.-2017.- No 3(57). - S. 59-65. (02.00.00. No 3) (in Russian)

5. Koshanova B.T., Kucharov B.Kh., Erkaeva A.U., Mamarasulov B. Obtaining burkeite from sulfate salts of Uzbekistan. // Universum: Engineering sciences. - No. 12 (57).-2018. -FROM. 102-107. (02.00.00. No 1) (in Russian)

6. 6. Patent of the Republic of Uzbekistan. No. IAP 05634. Method for producing burkeite. / Erkaev A.U., Koshchanova B.T., Kucharov B.Kh., Begdullaev A.K., Toirov Z.K. and others (UZ) - // publ. 08/30/2018. Bull., 2018. No 8. (in Russian)

7. S.Yu. Sukhinina, G.I. Bondarev, .M. Poznyakovsky. Iodine and its importance in human nutrition // Zhurn. Nutrition issues. – 2005.- No 3.– 12 p. (in Russian)

8. Guidelines "Methods for determining the iodine content in food raw materials and food products." – Krasnodar, 2014. -FROM. 18 p. (in Russian)

9.  GOST R 51575-2000 “Iodized table salt. Methods for the determination of iodine and sodium thiosulfate. (in Russian)

10. Poluektov N.S. Flame photometry analysis methods. Moscow: Chemistry, 1967. 307 p. (in Russian)

11. Makoto Otsuka  and  Hajime Kinoshita.Quantitative Determination of Hydrate Content of Theophylline Powder by Chemometric X-ray Powder Diffraction Analysis. // AAPS Pharm Sci. Tech.-2010 March; 11(1): 204–211.

12. Patrick Echlin Handbook of Sample Preparation for Scanning Electron Microscopy and X-Ray Microanalysis, Cambridge Analytical Microscopy, UK, Springer.-2009.-330p.

To cite this article: N. A. Ulasheva, B. Kh. Kucharov, A. U. Erkaev, B. S. Zakirov, R. N. Kim. study of coсristallization of potassium iodide in crystals of table salt using physico-chemical methods of analysis // Uzbek chemical journal. -2022. – Nr4. - Pp. 48-53. 

Received: 02.08.2022; Accepted: 12.08.2022; Published: 15.08.2022

         

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UDK 631.84.+631.811

D. O. Obidjonov, N. R. Zokirova, F. B. Khairiev, M. V. Yulbarsova, A. U. Erkaev,  B. X. Kucharov, B. S. Zakirov

STUDY OF THE PROCESS OF OBTAINING LIQUID FERTILIZERS

Institute of General and Inorganic Chemistry of the AS RUz

Abstract. Background.  The organization of production of complex fertilizers in the republic is relevant and promising.

Purpose: development of technology for obtaining microelement-containing concentrated nitrogen-potassium liquid fertilizers.

Methodology. The pH of solutions was measured on a BANTE 210 pH meter; kinematic viscosity - on the capillary viscometer VPZH. Mass spectrometric (ICP-MS) analysis of the samples was carried out according to the procedure.

Originality. The solubility of components in the system KNO₃ - CO(NH₂)₂ - H₂O at 25°C, the rheological properties of solutions from solubility diagrams were studied. Stable liquid fertilizers with a crystallization temperature of less than 10℃ have been obtained.

Findings. A feature of solubility isotherms is that the components of the system have a mutual salting out effect. Solubility in their joint presence decreases to the eutonic point.

Key words: component, solution, crystallization, density, viscosity, potassium nitrate, urea, fertilizer, trace element.

Highlights:

- studied the process of decomposition of spent catalysts with nitric acid;

-optimal parameters of the decomposition process were found.

References

1. Pirogovskaya. G.V., Vermeichik L.A., Daineko T.M. Efficiency of liquid mineral fertilizers on soddy-podzolic soils// Agropanorama: Scientific and technical journal for workers of the agro-industrial complex. -2002. -No.2.-S.25-28. (in Russian)

2. Murovtsev G.S., Chkanikov D.I., Kulaeva O.N. Fundamentals of chemical regulation of plant growth and productivity. -M.: Agropromizdat, 1987.-387 p. (in Russian)

3. Nickell L. J. Plant growth regulators. Application in agriculture, translation from English, 1984. (in Russian)

4. Saibova M.T. A complex of nitrogen and nitrogen-phosphorus fertilizers with physiologically active substances: Dis....dok.him.nauk.-Tashkent, 1989. -351 p. (in Russian)

5. Borodin P.V. The effectiveness of the use of foliar liquid fertilizer Ecolist on crops of malting barley. // Proceedings of the conference "Modern technologies of agricultural production": XII international scientific and practical conference. Ministry of Agriculture and Food of the Republic of Belarus, Educational Institution "Grodno State Agrarian University". – Grodno. -2009. -p.159-160. (in Russian)

6. Vinnik M.M., Erbanova L.N., Zaitsev P.M. et al. Methods for the analysis of phosphate raw materials, phosphate and complex fertilizers, feed phosphates. – Moscow.: Chemistry, 1975.-218 p. (in Russian)

7. Poluektov N.S. Methods of analysis by photometry of the flame. - Moscow.: Chemistry, 1967. - 307 p. (in Russian)

8. Zdanovsky A.B. Galluria. -L.: Chemistry, 1972. - S. 572. (in Russian)

9. Gorabachev S.V. Workshop on physical chemistry. - M.: Higher School, 1974. -310 p. (in Russian)

10. Florov Yu.G. Course of colloid chemistry. Surface phenomenon and disperse systems. - M.: Chemistry, 1982. - S. 117-124. (in Russian)

11. Handbook of solubility / V.B. Kogan, S.K. Ogorodnikov, V.V. Kafarov; ed. V.V. Kafarov. T.3 in 3 books. - L .: Nauka, 1969. book 2. - 1171 p. (in Russian)

12. Handbook of solubility / V.B. Kogan, S.K. Ogorodnikov, V.V. Kafarov; ed. V.V. Kafarov. -T.3 in 3 books. - L .: Nauka, 1969. book 3. – 1222 p. (in Russian)

To cite this article: N. A. Ulasheva, B. Kh. Kucharov, A. U. Erkaev, B. S. Zakirov, R. N. Kim. study of coсristallization of potassium iodide in crystals of table salt using physico-chemical methods of analysis // Uzbek chemical journal. -2022. – Nr4. - Pp. 54-58. 

Received: 01.08.2022; Accepted: 15.08.2022; Published: 15.08.2022

         

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ORGANIC CHEMISTRY

 

UDK 547.735’854.218.07:542.924

A. U. Berdiev, I. S. Ortikov, B. Zh. Elmuradov

NUCLEOPHILIC SUBSTITUTION REACTIONS OF 4-CHLORO-5,6,7-TRIHYDROCYCLOPENT[4,5]THIENO[2,3-D]PYRIMIDINE WITH SOME SECONDARY HETEROCYCLIC AMINES

Institute of Chemistry of Plant Substances of the AS of the Republic of Uzbekistan, E-mail: 4bdugani@gmail.com [19]

Abstract. Background. In recent years, new medicinal substances have been identified, including derivatives of condensed thieno[2,3-d]pyrimidine. It is important to obtain their new derivatives using organic synthesis, to determine their biological activity for the creation of medicines.

Purpose: synthesis of 4-chloro-5,6,7-trihydrocyclopenta[4,5]thieno[2,3-d]pyrimidine and based on it - the reaction of nucleophilic exchange with secondary amines, to determine the factors affecting the reaction and the optimal reaction conditions.

Methodology. Methods of organic synthesis were used to create new derivatives of 4-chloro-5,6,7-trihydrocyclopenta[4,5]thieno[2,3-d]pyrimidine. The structure of the synthesized substances was confirmed by IR and ¹H NMR spectroscopy.

Originality. Based on 4-chloro-5,6,7-trihydrocyclopenta[4,5]thieno[2,3-d]pyrimidine, 4-piperidino-5,6,7-trihydrocyclopenta[4,5]thieno[2,3-d]pyrimidine, 3-(5,6,7-trihydrocyclopenta-[4,5]thieno[2,3-d]pyrimi- din-4-yl)- 1,2,3,4,5,6-hexahydro- 8H-1,5-methanopyrido-[1,2-a][1,5]diazocin-8-one, 4-morpholino-5,6,7-trihydrocyclopenta[4,5]thieno[2,3-d]pyrimidines.

Findings. 4-Chloro-5,6,7-trihydrocyclopenta [4,5]thieno[2,3-d]pyrimidine and new compounds based on it were synthesized in high yield. Their IR, ¹H, and ¹³C NMR spectra were analyzed and their compliance with the proposed structure was proved.

Key words: thieno[2,3-d]pyrimidin-4-one, 3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one, 4 -chloro-5,6,7-trihydrocyclopenta[4,5]thieno[2,3-d]pyrimidine, phosphorus oxychloride, triethylamine, cytisine, piperidine, morpholine, ¹H NMR spectroscopy.

Highlights:

- ester of 2-amino-5,6-disubstituted thiophene carboxylic acid,

- 5,6-disubstituted thieno[2,3-d]pyrimidin-4-one was synthesized by the Gewald reaction.

- the synthesis of 4-chloro-5,6,7-trihydrocyclopenta[4,5]thieno[2,3-d]pyrimidine was carried out.

- nucleophilic substitution reactions with various secondary amines

- the factors influencing the reaction and the optimal reaction conditions are determined.

- structure confirmed by IR, ¹H NMR spectroscopy.

References

1.   Virupakshi Prabhakar, Kondra Sudhakar Babu, LK Ravindranath and VM Dayalan. Design, synthesis of novel thieno[2,3-d] derivatives and their anti-microbial studies, Organic & Medicinal Chem IJ 3(4): OMCIJ.MS.ID.555618 (2017), DOI: 10.19080/OMCIJ.2017.03.555618.

2.   Khurshed Bozorov, Jiang-Yu Zhao, Burkhon Elmuradov, Apar Pataer, Haji A. Aisa. Recent developments regarding the use of thieno[2,3-d]pyrimidin-4-one derivatives in medicinal chemistry, with a focus on their synthesis and anticancer properties, //European Journal of Medicinal Chemistry (2015), DOI: 10.1016/j.ejmech.2015.08.018.

3.   Elmahdy KM, Elkazak AM, Abdel Megid M, M Seada, Osama F Mohamed. Synthesis, characterization and biological evaluation of some new thieno[2,3-d]pyrimidine derivatives. Advances in Chem (2013), 5: 581-591.

4.   Rashad AE, Ali MA  Synthesis and antiviral screening of some thieno[2,3-d] pyrimidine nucleosides. Nucleotides (2006) 25: 17-28.

5.   El-Gazzar ABA, Hussein HAR, Hafez HN Synthesis and biological evaluation of Thieno[2,3-d] pyrimidine derivatives for antiinflammatory, analgesic and ulcerogenic activity. Acta Pharm (2007), 57(4): 395-411.

6.   Deng JF, Peng L, Zhang GC, Lan XB, Li CF, et al. The highly potent and selective dipeptidyl peptidase IV inhibitors bearing a thienopyrimidine scaffold effectively treat type 2 diabetes. H Eur J Med Chem (2011) 46(1): 71-76.

7.   Nagaraju K, Harikrishna N, Vasu K, Rao CV  Synthesis and biological activity of novel bis and mono heterocycles of thienopyrimidine derivatives. Indo Am J Pharm Res (2015), 5(4): 1604-1612.

8.   Guo Y, Li J, Ma J, L Yu Z, Wang H, et al. Synthesis and anti-tumor activity of αaminophosphonate derivatives containing thieno[2,3-d]pyrimidines. Chin Chem Lett (2015), 26: 755.

9.   Zhu W, Chen C, Sun C, Xu S, Wu C, et al. Design, synthesis and docking studies of novel thieno pyrimidine derivatives bearing chromone moiety as mTOR/PI3Ka inhibitors. Eur JMed Chem (2015), 93: 64-74.

10. Kim Y, Kim M, Park M, Tae J, Baek D, et al. Synthesis of novel dihydropyridothienopyrimidin-4,9-dione derivatives. Molecules (2015), 20(3): 5074-5084.

11. Liu H, Wang HQ, Liu ZJ  Synthesis and herbicidal activity of novel pyrazolo [3,4-d]pyrimidin-4-one derivatives containing aryloxy phenoxy propionate moieties. Bioorg Med Chem Lett (2007), 17(8): 2203-2209.

12. Wang JM, Asami T, Yoshida S, Murofushi N  Synthesis and biological evaluation of 5-substituted pyrimidines as potential plant growth regulators that inhibit brassinosteroids biosynthesis. Biosci Biotechnol Biochem (2001), 65: 817.

13. Gordon A., Ford R. Chemist's Companion. Physical and chemical properties, methods. – Moscow: Mir, 1976.- 541 p. (in Russian)

14. Erno Pretsch, Philippe Buhlmann, Martin Badertscher. Structure Determination of Organic Compounds: Tables of Spectral Data 4th ed. Springer Berlin Heidelberg; 4th ed. 2009 edition (March 19,2009), 452 p.

To cite this article: A. U. Berdiev, I. S. Ortikov, B. Zh. Elmuradov. Nucleophilic substitution reactions of 4-chloro-5,6,7-trihydrocyclopent[4,5]thieno[2,3-d]pyrimidine with some secondary heterocyclic amines // Uzbek chemical journal. -2022. – Nr4. - Pp. 59-65. 

Received: 29.06.2022; Accepted: 29.07.2022; Published: 15.08.2022

         

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UDK 547.596:615.291

A. Zh. Dzhuraev, A. D. Matchanov, I. N. Chuliev, R. S. Esanov, M. I. Asrarov

SYNTHESIS OF SOME 3-ACETOXY GLYCYRRETIC ACID DERIVATIVES AND THEIR EFFECT ON LIPID PEROXIDATION

¹Gulistan State University, ²IBOC AS RUz, ³Karshi State University, ⁴Institute of Biophysics and Biochemistry at NUU., Е-mail: alex26111972@gmail.com [20]

Abstract. Background. On the basis of the Licorice plant, anti-inflammatory and antiviral drugs have been created, which are widely used in medical practice. But their mechanism of action has not been established. The synthesis of derivatives of glycyrrhetic acid and the study of their biological activity is of interest.

Purpose: synthesis of amides and esters of 3-acetoxyglycyrrhetic acid and study of their effect on lipid peroxidation.

Methodology. Methods for the preparation of amides and esters, purification of substances by recrystallization, reaction control by TLC, determination of structures by IR and 1H NMR spectroscopy were used.

Originality. New amides and esters of 3-acetoxyglycyrrhetic acid have been synthesized and the antioxidant and prooxidant properties of the obtained substances have been studied.

Findings. Amides and esters of 3-acetoxyglycyrrhetic acid have been synthesized, their structure has been established, their physicochemical parameters have been studied, and it has been established that the synthesized derivatives of 3-acetoxyglycyrrhetic acid affect lipid peroxidation.

Key words: glycyrrhetic acid, amines and alcohols, alkaloids, lipid peroxidation, mitochondria, megapore, malonic dialdehyde.

Highlights:

- amides and esters of 3-acetoxyglycyrrhetic acid containing alkaloid residues.

- the structure of the obtained substances by 1H NMR spectroscopy.

- as LPO inductors - cumene hydroperoxide (HPA) and the Fe^{2 +}-ascorbate system.

References

1. Tolstikov G.A., Baltina L.A., Grankina V.P. Licorice: biodiversity, chemistry, application in medicine. -Novosibirsk: Geo, 2007. -p.312. (in Russian)

2. Tolstikov G. A., Baltina L. A., Shults E. E., Pokrovsky A. G., Glycyrrhizic acid//Bioorganic chemistry.-1997. - No 9.–S.691-709. (in Russian)

3. BaltinaL.A.,NugumanovТ.R.,Borisevich S.S., Khalilov L.M., Petrova S.F.,Khursan S.L., LinCh.W. Glycyrrhetinic acid derivatives as Zika virus inhibitors: Synthesis and antiviral activity in vitro//Bioorg. Med. Chem. -41. -2021. -116204

4. Inoue M., Saito M., Koshihara Y., Murota S. Inhibiting effect of glycyrrhetinic acid derivatives on lipoxygenase and prostglandinesyntetase //Chem. рharm. вull. – Tokyo.-1986. – Vol. 34. – P.897-904.

5. B.Xu ,G.Wu, X.Zhang, M.Yan, R.Zhao, N.Xue, K.Fang, H.Wang, M.Chen, W.Guo, P.Wangand H.Lei.An Overview of Structurally Modified GlycyrrhetinicAcid Derivatives as Antitumor Agents//Molecules. -2017.-22.       –Р.924;doi:10.3390/molecules22060924

6. L. A. Baltina (Jr.), R. M. Kondratenko, O. A. Plyasunova, L. A. Baltina, A. G. Pokrovsky, L. M. Khalilov, F. Z. Galin, G. A. Tolstikov.//Chemical Pharmaceutical Journal.-2008. – No 2. P.14-17(in Russian)

7. V.V. Zarubaev, V.B. Anikin, V.S. Smirnov, Antiviral activity of glycyrrhetic and glycyrrhizic acids//Infection and immunity. -2016. -T.6. - No 3, -S.199–206 (in Russian)

8. Obolentseva G.V., Litvinenko V.I., Ammosov A.S., Popova T.P., Sampiev A.M. Pharmacological and therapeutic properties of licorice preparations (review). // Chem.nature.Comp. - Tashkent. - 1999. - V.8. - P.24-30. (in Russian)

9. Pavlova S.I., Uteshev B.S., Sergeev A.V. Liquorice root. Possible mechanisms of antitoxic, anticarcinogenic and antitumor properties (review) // Chem.-farmats. magazine – Tashkent.-2003.-V.37. - No 6.- P.36-39. (in Russian)

10. Karomatov I.D. Licorice, licorice, licorice - use in medicine (literature review). //Current issues humanities and natural sciences. -2013. - No. 11(58). -p.230-235. (in Russian)

11. Whitehouse M.V., Haslam J.M.,Ability of Some Antirheumatic Drugs to uncouple Oxidative Phosphorylation.//Nature. -1962. -196. P.413

12. Ziyatdinova R.Kh., Izotova L.Yu., Tukfatullina I.I. Study of the effect of glycyrrhetic acid derivatives on structural rearrangements in lipid membranes // Structure and functions of biological membranes. Abstracts of scientific conference May 17-18. Tashkent.-2001.- P.13-14. (in Russian)

13. Zeuzem S. Glycyrrhizin for the treatment of allergic diseases and chronic hepatitis.// Dtsch. Med. Wochenschr. - 1998. - V.123. - P.372-379.

14. Patrick L. Hepatitis C: epidemiology and review of complementary/alternative medicine treatments. // Altern. Med. Rev. - 1999. - V.4. - P.220-238.

15. Juraev A.Zh., Dalimov D.N., Kamaev.F.G. Esters of 18β-glycyrrhetic acid acetate based on some amino alcohols. -1998. –C.83-85. (in Russian)

16. Salakhutdinov B.A., D.N. Dalimov D.N., Aripov T.F., Tukfatullina Ya.Ya., Ziyatdinova R.Kh., Juraev A.Zh., Kamaev F.G., Izotova L.Yu. ., Ibragimov BT, Mavridis Ya., Giastas P. Synthesis, structure and membrane-active properties of new derivatives of glycyrrhetic acid. // Chemistry of nature, connection, -2002. - No 3. S.209-215. (in Russian)

17. Meng Y.,  Wang X., SongY., Li F. Synthesis of Novel Glycyrrhetinic Acid Analogues. International Conference on Bioinformatics and Biomedical Engineering (ICBBE), 18-20 iyun 2010

18. Khalilov L.Kh., Vasil'eva E.V., Fatikhov A.A., Tolstikov G.A. 13C NMR spectra of biologically active compounds: Two-dimensional HH COZY 450 CHHETCORR spectra of 18α- and 18β-isomers of 3-acetate of glycyrrhetic acid//Chemistry natural. connect. -1991. - No 3. -S.363-373. (in Russian)

19. Muravyov I.A., Savchenko L.N. Obtaining glycyrrhetinic acid from extracts of licorice root.// Khim.farm.zhurn.-1979. - No 5. -S.97-102. (in Russian)

20. Tolstov G. A, Goryaev M. And "Glyceric acid". - Alma-Ata. -1966.-p.55. (in Russian)

21. Vladimirov Yu.A., Archakov A.I. Lipid peroxidation in biological membranes. - Moscow, 1972. (in Russian)

22. Gubsky Yu.I., Zaika A.P. Calcium transport and lipid peroxidation in liver microsomes in acute intoxication with carbon tetrachloride// Sat. Pharmacology and toxicology. - Kyiv: "Health", 1990. - S. 90-93. (in Russian)

23.  Batandier C., Leverve X., Fontaine E. Opening of the mitochondrial permeability transition pore induces reactive oxygen species production at the level of the respiratory chain complex I.// J. Biol. chem. – 2004.-V.279 (17). – P.17197-17204.

24. Vladimirov Yu.A. Kinetics of reactions of lipid peroxidation and the mechanism of regulation of this process in the cell // All-Union Biochemical Congress: Proceedings of Symposium. report – M.: Science. 1985. - 300s (in Russian)

25. Carla M., Cardoso P., Leonor M., Almeida and Jose B., Custodio A. Protection of tamoxifen against oxidation of mitochondrial thiols and NAD(P)H underlying the permeability transition induced by prooxidants//Chemico-Biological Interactions. – 2004. –V.148. – P.149-161.

26. Kamburova V.S. Regulation of cyclosporin A - the sensitive pore of mitochondria: the effects of glycyrrhizic acid and its aglycone: Diss. … cand. biol. Sciences. -T. 2001. - 110s. (in Russian)

27. DuchenM.R. Rolesofmitochondriainhealthanddisease. // Diabetes. - 2004.    -V.53. (Suppl. 1). - P.96-102.

To cite this article: A. Zh. Dzhuraev, A. D. Matchanov, I. N. Chuliev, R. S. Esanov, M. I. Asrarov. Synthesis of some 3-acetoxy glycyrretic acid derivatives and their effect on lipid peroxidation // Uzbek chemical journal. -2022. – Nr4. - Pp. 66-73. 

Received: 20.06.2022; Accepted: 12.08.2022; Published: 15.08.2022

         

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UDK 577.114.4  

Zh. A. Abdurakhmanov, Sh. A. Shomurotov, O. R. Akhmedov, Zh. A. Khabibullaev, A. S. Turaev

STUDY OF THE FEATURES OF DEXTRAN PERMANGANATE OXIDATION

Institute of Bioorganic Chemistry of the Academy of Sciences of the Republic of Uzbekistan, st. Mirzo Ulugbek 83, Tashkent 100125, e-mail: ibchem@uzsci.net [21]                                                                                                  

Abstract. Background. Chemical modification of polysaccharides is one of the priorities in the chemistry of macromolecular compounds. Among the methods of modification, periodate oxidation is known, in which vicinal hydroxyl groups are oxidized with the transition to aldehyde groups. However, it is based on the use of expensive reagents. The development of new methods for introducing aldehyde groups into polysaccharide macromolecules is of current interest.

Purpose: study of permanganate oxidation of dextran to obtain reactive dialdehyde derivatives, which are polymer carriers for the immobilization of biologically active substances.

Methodology. Oxidation of dextran with permanganate was carried out, derivatives containing aldehyde groups were obtained. Their structures have been established, and the effect of reaction conditions on the properties and molecular parameters of the reaction products has been studied.

Originality. The optimal conditions for obtaining dialdehyde derivatives of dextrans with controlled properties and parameters were found by oxidizing dextran with potassium permanganate.

Findings. The conditions for obtaining dialdehyde derivatives of dextran are determined, and molecular parameters are established. The obtained dialdehyde derivatives of dextran can be used as a carrier polymer for the immobilization of biologically active substances.

Key words: dextran, oxidation, dialdehyde dextran, hemiacetal bond, carrier polymer, molecular parameters.

Highlights:

- dialdehyde derivatives of dextrans with controlled physical and chemical properties;

- molecular parameters after oxidation of dextran with potassium permanganate;

- structure of synthesized dialdehyde derivatives of dextrans.

References

1. Panarin E.F. Polymer carriers of biologically active substances / E.F. Panarin, N.A. Lavrov, M.V. Solovskiy, L.I. Shalnova.-SPb.: Profession, 2014.-299 p. (in Russian)

2. Gumnikova V.I. Synthesis of dialdehyde dextran and dialdehyde carboxymethylcellulose and their chemical transformations: Diss...cand. chem. Sciences. - Moscow., -2014.-137 p.(in Russian)

3. Karimov A.K., Shomurotov Sh.A., Urazboev Sh.R. Synthesis of a carrier polymer from dextran for obtaining macromolecular medicinal systems of prolonged action//Pharmaceutical journal.-Tashkent.-2020.- No 3.-p.20-26. (in Russian)

4.   Zhang, X., Yang, Y., Yao, J., Shao, Z., & Chen, X. (2014). Strong Collagen Hydrogels by Oxidized Dextran Modification //ACS Sustainable Chemistry & Engineering. -2(5).-Р. 1318-1324.

5. Dolgova A.A., Chapala P.P., Kruppa I.S., Gumnikova V.I., Dyatlov V.A. Chemical structure of dialdehyde dextrans - carrier polymers in medical compositions for bone tissue replacement // Advances in chemistry and chemical technology.-2012.-T.26.- No 3 (132). 91-95. (in Russian)

6.   Coseri S. et al. Oxidized cellulose-survey of the most recent achievements // Carbohydrate polymers.-2013.-V.93.- No. 1.-P.207-215.

7.   Kare A. Kristiansen, Antje Potthast , Bjorn E. ChristensenPeriodate oxidation of polysaccharides for modification of chemical and physical properties // Carbohydrate Research.-2010.-345(10).-Р. 1264-1271.

8. Shomurotov Sh.A., Akhmedov O.R., Turaev A.S. Features of the synthesis of dialdehyde derivatives of polysaccharides// Uzbek chemical journal.-Tashkent.-2013.- No 1.-p.30-33. (in Russian)

9. Gumnikova V.I., Dyatlov V.A., T.A. Grebeneva V.A., Krupna I.S., Kireev V.V., Bakhmutov V.I. Study of the chemical structure of dialdehyde dextrans obtained by periodate oxidation under various conditions // Plastic masses. -2013.- No 6.-S. 44-50. (in Russian)

10. Gumnikova V.I., Dyatlov V.A., Chapala P.P., Dolgova A.A. The structure of the oxidized units of the products of periodate oxidation of the clinical dextran "Polyglukin" // Chemical technology: Proceedings. report International Conference on Chemical Technology "HG12".-Moscow.-2012.-T.3.-S. 300-302. (in Russian)

11. Dyatlov V.A., Gumnikova V.I., Grebeneva T.A., Kruppa I.S., Rustamov I.R., Kireev V.V., Maleev V.I. Study of the chemical structure of dialdehydecarboxymethyl cellulose produced by periodate oxidation under different conditions // Plasticheskie Massy.-2013.-No8.-Р.6-12.

12. Starostenko, A.A., Troitskii, A.V., Medvedev, V.S., Gulyaeva, E.P., Bystrova, T.N., & Shkurupii, V.A. Pharmacokinetic Study of Oxidized Dextrans // Pharmaceutical Chemistry Journal.-2016.-49(12).-Р.795-797.

To cite this article: Zh. A. Abdurakhmanov, Sh. A. Shomurotov, O. R. Akhmedov, Zh. A. Khabibullaev, A. S. Turaev. Study of the features of dextran permanganate oxidation // Uzbek chemical journal. -2022. – Nr4. - Pp. 73-78. 

Received: 16.06.2022; Accepted: 15.07.2022; Published: 15.08.2022

         

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