Volume NR 2
INORGANIC CHEMISTRY
UDK 548.75:546.3
1.2Sh. Sh. Daminova, 1,2Z. C. Kadirova, 3Kh. T. Sharipov
IR-SPECTROSCOPIC STUDY OF NOBLE METALS WITH IMPREGNATED SORBENTS
1Technological Institute of Chemistry and Technology, Tashkent, Uzbekistan
2GU "Uzbek-Japanese Youth Innovation Center", Tashkent, Uzbekistan
3GUP "Fan va taraqqiyot", Tashkent, Uzbekistan, E-mail: daminova_sh@mail.ru
Abstract. Background. Despite of the high sensitivity of modern analytical methods, direct determination of noble metals is difficult due to small content, complex composition of the natural object matrixes and the interference influence of macro components on the analytical signal. Therefore, in order to increase the results reliability and correctness of the natural objects analysis the various methods of separating elements from the matrix background are used in practice. The sorption with complexing sorbent is an effective way of isolation and preconcentration in the analysis of objects with complex composition because such sorbents have a high selectivity to noble metals due to the presence of donor atoms.
Purpose. The aim is to study the microstructure and structure of sorbents before and after sorption of noble metal ions to obtain additional data on the structure and mechanism of complex formation on impregnated sorbents.
Methodology. The IR spectra of the sorbents before and after sorption were recorded on a FT-IR spectrometer with ATR attachment (Nicolet iS50, Thermo Scientific, Germany).
Originality. IR absorption spectra of initial and modified impregnated sorbents were studied before and after metal sorption in solution. The participation of functional groups of the impregnated organic reagents was confirmed during complex formation. The interaction between impregnated organic ligands and metal ions with the formation of stable metal complexes has been established by the characteristic bands shifts in the spectrum.
Findings. The processes of complex formation between the impregnated sorbents and the noble metals ions (NB) on the surface of the sorbent were studied by the FTIR method. A number of characteristic bands in the IR spectrum indicated on the interaction of metal ions with an impregnated organic ligand forming NM complexes.
Key words: IR spectra, sorption, silver, gold, platinum, impregnant.
Highlights:
* IR spectra and link between noble metal ions and impregnated sorbent
* Impregnation of the PAD400 and PAD600 with the MAB, DADTFK
* MAB coordinates metal ions on mono-dentate, DADTFK - bi-dentate nature.
To cite this article: Sh. Sh. Daminova, Z. C. Kadirova, Kh. T. Sharipov. IR-spectroscopic study of noble metals with impregnated sorbents // Uzbek chemical journal.- 2018. – Nr2. – Pp.3-11.
Received: 29.03.2018; Accepted: 11.04.2018; Published: 27.04.2018.
References
1. Myasoedova G. V., Mokhodoeva O. B., Kubrakova I. V. Trends in sorption preconcentration combined with noble metal determination //Analytical Sciences. – 2007. – Т. 23. – No.9. – P. 1031-1039.
2. Ünlü N., Ersoz M. Adsorption characteristics of heavy metal ions onto a low cost biopolymeric sorbent from aqueous solutions //Journal of Hazardous Materials. – 2006. – Т. 136. – No. 2. – P. 272-280.
3. Ying X., Fang Z. Experimental research on heavy metal wastewater treatment with dipropyl dithiophosphate//Journal of hazardous materials. – 2006. – Т.137. – No. 3. – P.1636–1642.
4. Sharma S., Rajesh N. 2-Mercaptobenzothiazole impregnated cellulose prepared by ultrasonication for the effective adsorption of precious metal palladium //Chemical Engineering Journal. – 2014. – Т. 241. – P. 112-121.
5. Mokhodoeva O. B., Myasoedova G. V., Kubrakova I. V., Nikulin A. V., Artyushin O. I., Odinets I. L. New solid extractants for preconcentrating noble metals //Journal of Analytical Chemistry. – 2010. – Т. 65. – No. 1. – P. 12-16.
6. Kubrakova I. V., Nikulin A. V., Koshcheeva I. Y., Tyutyunnik O. A. Platinum metals in the environment: content, determination, and behavior in natural systems //Khim. Interesakh Ustoich. Razvitiya. – 2012. – Т. 20. – No. 6. – P. 645-656.
7. Malofeeva G. I., Petrukhin O. M. Chelating heterochain sorbents based on amines of different basicity and their application to metal preconcentration //Journal of Analytical Chemistry. – 1992. – Т. 47. - No. 3– P. 456-465.
8. Mokhodoeva O. B., Myasoedova G. V., Zakharchenko E. A. Solid-phase extractants for radionuclide preconcentration and separation. New possibilities //Radiochemistry. – 2011. – Т. 53. – No.1. – P. 35-43.
9. Daminova Sh.Sh., Kadirova Z.Ch., Sharipov H.T. Nanostructirovanniye tverdiye extragenti na osnove stirol-divinilbenzolnich matris i N,O,P,S-polifuncsionalnich ligandov // Хimiya i chimicheskaya technologiya -2016. - No.1. –S.45-48.
10. Daminova Sh.Sh., Kadirova Z.Ch., Sharipov H.T. Investigation of copper, nickel (II), and iron (III) ions sorption on SIR by using FTIR and DRS methods // Austrian Journal of Technical and Natural Sciences. -2016. - No. 9-10. –P.79-83.
11. Daminova Sh.Sh., Kadirova Z.Ch., Sharipov H.T. IR-spectroscopic study of transition metal sorption with impregnated sorbents based on Porolas // Uzbekskii Khimicheskii Zhurnal -2016. - No.6. -S.3-9.
12. Daminova S. S., Kadirova Z. C., Sharipov K. T., Stoyko O. V., Chepulsky S. A., Adewuyi A., Hojamberdiev M. Diisopropyldithiophosphoric acid-impregnated macroporous non-ionogenic styrene-divinylbenzene polymeric sorbent (Porolas) for effective copper extraction //Journal of Industrial and Engineering Chemistry. – 2017. – Т. 55. – P. 204-214.
13. Daminova Sh.Sh., Kadirova Z.Ch., Sharipov H.T. Sorption of Ag(I) ions on solid impregnated resins PAD600 and PAD400 // Austrian Journal of Technical and Natural Sciences -2016. –No.11-12. –P. 60-63.
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UDK 541.123.3
I. M. Miyassarov, A. S. Toghasharov, J. S. Shukurov, S. Tukhtaev
PHYSICAL AND CHEMICAL BASES FOR RECEPTION DEFOLIANT BASED ON MONOCARBAMIDOCHLORATE SODIUM AND AMMONIUM CITRIC ACID
Institute of General and Inorganic Chemistry of Uzbek Academy of Sciences, E-mail: ionxahat@mail.ru
Abstract. Background. Carrying out high-quality defoliation of cotton makes it possible to carry out a complete cleaning of raw cotton in a short time. Produced in the domestic industry defoliants-magnesium chlorates and sodium in the application of "hard" act on the plant and do not have complex properties, ie not fully meet the requirements of cotton. "Rigidity" of their action on plants requires the creation of new effective, gently acting on plants defoliants.
Purpose. The aim of the study is the physico-chemical substantiation of the process of obtaining a comprehensive acting defoliant of cotton on the basis of monocarbamidochlorate sodium and physiologically active substances.
Methodology. For the physico-chemical substantiation of the process of obtaining a comprehensive acting defoliant of cotton, for the first time obtained data on the solubility and rheological properties of solutions to including monocarbamidochlorate sodium and physiological active substance. For the job used the visual-polythermal, picnometric methods.. Measurement of viscosity of solutions was performed using a viscometer VСL, pH was determined by рН meter FE 20 METTLER TOLEDO.
Originality. Established physico-chemical basis for interaction of components in the system involving water, the chlorate of sodium, urea and ammonium citrate, built by his polythermal solubility diagram. To justify the process of obtaining a complex defoliant containing physiologically active substances, the "composition-properties" of the system [60%NaClO3•CO(NH2)2+ 40%H2O]-C6H17O7N3 were studied. The results of the studies show the pssibility of obtaining a liquid defoliant with physiological activity.
Findings. Based on polytherm binary systems and internal sections built polythermal solubility diagram of the system of NaClO3•CO(NH2)2-C6H17O7N3-H2O in the temperature range from -33,0 to 40°C. polythermal solubility diagram of the delineated field of crystallization of ice, CO(NH2)2, NaClO3•CO(NH2)2,C6H17O7N3•H2O and C6H17O7N3. Crystallization temperatures, viscosity, density and pH of the medium, solutions of the system [60% NaClO3•CO(NH2)2+40% H2O]-C6H17O7N3 depending on the ratio of components are determined.
Keywords: solubility, system, diagram, concentration, defoliants.
Highlights:
* Crystallization fields in a system NaClO3•CO(NH2)2-C6H17O7N3-H2O;
* Оptimal parameters for obtaining a liquid defoliant were established.
To cite this article: I. M. Miyassarov, A. S. Toghasharov, J. S. Shukurov, S. Tukhtaev. Physical and chemical bases for reception defoliant based on monocarbamidochlorate sodium and ammonium citric acid // Uzbek chemical journal.- 2018. – Nr2. – Pp.12-17.
Received: 05.03.2018; Accepted: 05.04.2018; Published: 27.04.2018.
References
1. Umarov A.A., Kutyanin L.I. Novyie defoliantyi: poisk, svoystva, primeneniya. M.: Himiya. 2000. -87s.
2. Teshaev F., Khaitov B. Effect of defoliants and fertilizers on yield and quality of upland cotton (Gossypium hirsutum L.) // Journal of Cotton Research and Development (CRDA). -India, 2015. –No.1. pp. 57-60.
3. Saibova M.T. Kompleks azotnyih i azotnofosfornyih udobreniy s fiziologicheski aktivnyimi ves`hestvami: dis. D-ra. him. nauk. 05.17.01. /AN RUz In-t. himii. T. 1989g. 351 s.
4. Adilova M.SH. poluchenie defoliantov na osnove hlorata natriya, magniya, karbamida i monoyetanolaminnyih soley karbonovyih kislot: Avtoref. dis….kand.tehn.nauk. -Tashkent, 2009.- 24s.
5. Trunin A.S. Petrova D.G. Vizual`no-politermicheskiy metod/ Kuybyishevskiy politehn. Ins-t. - Kuybyishev. 1977.-94s./ Dep. v VINITI No.584-78 Dep.
6. Zdanovskiy A.B., Gallurgiya: -L.: Himiya. 1972. -572s.
7. Frolov YU.G Kurs kolloidnoy himii // Poverhnostnoe yavlenie i dispersnyie sistemyi. -M.: 1982. 117-124s.
8. Gorbachev S.V. Praktikum po fizicheckoy himii -M.: Vyisshaya shkola. 1974. -310s.
9. Poluyektov N.S. Metodyi analiza po fotometrii plameni. - M.: Himiya, 1967. - 307 s.
10. Shukurov J.S., Askarova M.A., Tukhtaev S. The solubility of components in the system NaClO3•CO(NH2)2-C2H5OH-H2O // Austrian Journal of Technical and Natural Sciences. - No. 7-8. 2017 May-June pp. 69-72
11. Togasharov A.S. Politerma rastvorimosti sistemyi hlorat magniya - ammoniy limonnokislyiy trehzames`hennyiy - voda // Uzbekskiy himicheskiy zhurnal. 2011. - No.3. S. 175-178
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UDK 669.213.63+661.887
1А. H. Turesebekov, 2R. D. Allabergenov, 3S. N. Rasulova, 3V. P. Guro, 4H. T. Sharipov
REFRACTORY GOLD-CONTAINING BLACK-SHALE ORES AND APPROACHES TO THEIR PROCESSING
1Institute of Geology and Geophysics of the Academy of Sciences of the Republic of Uzbekistan, 2GP "Central Laboratory" of the State Committee of Geology of the Republic of Uzbekistan, 3IONH AS RUz, 4GUP "Fan va tararkiyot", Tashkent, Uzbekistan.
Abstract. Background. The main gold-bearing raw materials of Uzbekistan are quartz gold-bearing rocks containing sulfides, native gold and so-called "invisible" gold. The latter includes organogenic Au-forms, "organophilic" sulphide compounds, as well as native inclusions in pyrite, arsenopyrite, chalcopyrite. They concern black shale ore Kokpatas and Daugyztau. Existing processing technologies for them are of little use due to the under-production of gold.
Purpose: to evaluate the forms of gold and silver deposits in stubborn black shale ores from the Kokpatas and Daugyztau fields, and to develop approaches to their processing.
Methodology. The content of minerals in the samples was determined using X-ray phase analysis; the elemental analysis is performed on an Aligent 7500 IСP MS spectrometer, and the gold content in the matrix of the minerals is measured on a JXA-8800R, TRoe probe microanalyzer, Japan.
Originality. It has been established that the under-extraction of gold during processing of resistant Au-raw materials is solved by tightening the technological regime of the process: fine grinding of raw materials, mechano-physico-chemical activation, use of autoclave and oxidation-catalytic processes.
Findings. The mineral composition of the Kokpatas and Daugyztau ores is established. The forms of finding and content of gold, silver in these stubborn ore deposits have been revealed. The technology of processing these ores is proposed.
Key words: gold ore, black shale ore, gold, silver, sulphide minerals
Highlights:
* The forms of finding gold in black shale ores are revealed
* The under-extraction of Au originates at the stage of ores leaching
* Mechanophysical, pyrochemical activation of raw materials is required.
To cite this article: А. H. Turesebekov, R. D. Allabergenov, S. N. Rasulova, V. P. Guro, H. T. Sharipov. Refractory gold-containing black-shale ores and approaches to their processing // Uzbek chemical journal.- 2018. – Nr2. – Pp.17-23.
Received: 24.03.2018; Accepted: 17.04.2018; Published: 27.04.2018.
References
1. Turesebekov A.H., Kim M.A., SHaripov H.T. Formyi nahozhdeniya zolota v zoloto-sul`fidnyih mestorozhdeniyah Zapadnogo Uzbekistana // Materialyi Respubl. N.-tehn. konferencii. - Navoi: 12-14 maya 2011. - S.504-505.
2. Limberova V.V. i dr. Laboratornyie issledovaniya processa vyis`helachivaniya zolo-ta iz rud Taseevskogo mestorozhdeniya aktivirovannyim ul`trazvukom rastvoritelem //internet-resurs (RF).
3. CHervonnyiy I.F. Issledovanie processa vyis`helachivaniya zolotosoderzhas`hih rud v reaktore konusnogo tipa // internet-resurs (Ukraina).
4. Saltanat Sabitovna Konyratbekova , Aliya Baikonurova & Ata Akcil (2015) Non-cyanide Leaching Processes in Gold Hydrometallurgy and Iodine-Iodide Applications: A Review, Mineral Processing and Extractive Metallurgy Review: An International Journal, 36:3, 198-212, DOI: 10.1080/08827508.2014.942813, http://dx.doi.org/10.1080/08827508.2014.942813.
5. Allabergenov R.D. Avtoklavnyiy azotnokislotnyiy sposob pererabotki hal`ko-piritnyih koncentratov. - Avtoref….k.t.n. - Alma-Ata, 1983. - 25 s.
6. Bard, A. J., Parsons, R., and Jordan. J.. 1985, Standard Potentials in Aqueous Solutions, New York: Dekker, pp. 353-360.
7. A. D. Bas, E. Koc, Y. E. Yazici, H. Deveci. Treatment of copper-rich gold ore by cyanide leaching. Ammonia pretreatment and ammoniacal cyanide leaching // Trans. Nonferrous Met. Soc. China 25 (2015), 597?607 pp.
8. Stepanov B.A. Tiomochevinnoe vyis`helachivanie zolota. T.: 2009, 117 s.
9. Abbruzzese, C., Fornari, P., Massidda, R.. Vcglio. F., and Ubaldini, S. "Thiosulfate leaching for gold hydrometallurgy." Hydrometallurgy, 1995, 39, pp. 265.
10. Ivannikov S.I., YEpov D.G. i dr. Kompleksnyiy podhod k izvlecheniyu zolota iz tehnogennyih ob``ektov zoloto dobyichi Dal`nego Vostoka Rossii // Vestnik ONZ RAN, tom.5, Nr1001, M.: 2013, S.10-15.
11. 3yiryanov M.N., Leonov S. B. Hloridnaya metallurgiya zolota. - M.: "SP INTER-MET INZHINIRING", 1997, - 288 s.
12. Baghalha, M.. 2007, "Leaching of an oxide gold ore with chloride/ hypochlorite solutions." International Journal of Mineral Processing, 82, pp. 178-186.
13. Lodeys`hikov V.V. Upornyie zolotyie rudyi i osnovnyie principyi ih metallurgi-cheskoy pererabotki. Gidrometallurgiya zolota, M., Nauka, 1980g
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UDK 66 097 38(088 8)
V. P. Guro, A. T. Dadakhodzhaev, M. A. I bragimova, F. N. Fuzailova
PRODUCTION OF IRON-MOLYBDENUM CATALYST FOR OXIDATION OF METHANOL TO FORMALDEHYDE
Institute of General and Inorganic Chemistry of Uzbek Academy of Sciences, Tashkent, Uzbekistan
Abstract. Background. At JSC Navoiazot in the production of formaldehyde from methanol, with an output of 95-99%, an imported iron-molybdenum catalyst (IMC) is applied, with an atomic ratio of molybdenum and iron in oxides 2.5:1.7. Localization of the technology of its production is an urgent need of the industry.
Purpose: Preparation and testing in lab of samples of iron-molybdenum catalyst for synthesis formaldehyde from methanol. Tasks: 1) synthesis of samples of IMC in various ways; 2) laboratory studies of the samples of IMC, their transfer for the testing of catalytic activity in the JSC "Navoiazot", 3) development of the technological map of industrial synthesis of IMC from local raw materials.
Methodology. Samples of Fe-Mo (1); Fe-Mo-Cr (2) and Fe-Mo-Ca (3) have been synthesized by the methods described in a number of patents. Elemental analysis of them was performed on Perkin-Elmer 3030B, Aligent 7500 IСP MS spectrometers. Laboratory thermostat, pH meter EV-74 were applied.
Originality. Based on well-known patents, a number of IMC samples have been synthesized. Differences in the methodology of their synthesis, from patent requirements, consisted of the use of local raw materials, temperature and time regimes. The activity of catalysts is evaluated during the testing at JSC "Navoiazot".
Findings. The mechanical strength, the chemical composition and the catalytic activity of synthesized IMCs.
Keywords: iron, molybdenum, catalyst, synthesis of formaldehyde
Highlights:
* An iron-molybdenum catalyst was synthesized from an aqueous suspension;
* An iron-molybdenum catalyst containing chromium was synthesized;
* An iron-molybdenum catalyst containing calcium was synthesized.
To cite this article: V. P. Guro, A. T. Dadakhodzhaev, M. A. I bragimova, F. N. Fuzailova. Production of iron-molybdenum catalyst for oxidation of methanol to formaldehyde // Uzbek chemical journal.- 2018. – Nr2. – Pp.23-27.
Received: 24.03.2018; Accepted: 10.04.2018; Published: 27.04.2018.
References
1. Patent RU 2388536 Zyud-kemi katalists, Italiya, S.R.P. (II)
2. Lender YU. V. i dr. Proizvodstvo metanola i formal`degida. Kiev, Teh-nika", 1972. 172 s.
3. Ivanov G.N., Lyapkov A.A., Bochkarev V.V. Uchebnoe posobie - Tomsk: izd. TPU - 2002. - 113 s.
4. Ogorodnikov S.K. Formal`degid. - L: Himiya, 2004. - 280 s.
5. Patent 2458738 RF, MPK B01J 23/881, 37/00, 37/04, 37/34, S07S 47/04, 47/052. Sposob polucheniya katalizatora okisleniya metanola do formal`-degida / Il`in A.P. (RU), Il`in A.A. (RU), ZHukov A.B. (RU), Rumyancev P.N. (RU);
6. Patent 2388536 RF. Sposob polucheniya katalizatora okisleniya metanola do formal`degida. KONKA YEsterino (IT), RUBINI Karlo (IT), MARKI Marchello (IT). Patentoobladatel`(i): ZYUD-KEMI KATALISTS ITALIYA S.R.L. (IT). Prioritetyi: podacha zayavki: 2005-12-22; publika-ciya patenta: 10.05.2010
7. Patent RU 2047356, B01J 37/04, B01J 23/881, B01J 23/881, B01J 103:48, opubl. 10.11.1995]
8. RU 2611419C1 Sposob polucheniya katalizatora okisleniya metanola do formal`degida Inventor A.A. Il`in; A.P. Il`in; R.N. Rumyancev; I.V. Babichev; Original Assignee: FGBOVO"Ivanovskiy gos. him.-tehnol. uni-versitet" (IGHTU). Priority date 2015-12-28; Family: RU (1) - Date App/Pub Number Status 2015-12-28 RU2015156617A; 2017-02-22 RU 2611419 C1 Grant
9. Patent KZ (C)(11) 1048. Sposob polucheniya oksidnogo katalizatora dlya okisleniya metalnola v formal`degid. 6 B01J 37/04, B01J 23/86, B01J 23/86; Reg. No. 31837.1. data 02.08.93;opubl. 14.03.97,Byul.No.1 KZ(B) 1048,15.09.94. Avtoryi SHohireva T.X. (RU), YUr`eva T.M. (RU), Demesh-kina M.P. (RU), Skomorohova N.G. (RU), SHkuratova L.N. (RU). (73) In-stitut kataliza im. G.K.Boreskova Sibirskogo otdeleniya RAN (RU). Pastuhova O.V.
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UDK 662.71+504
R.A. Paygamov, D.S. Salikhanova, I.D. Eashmetov, D.J. Jumaeva
OBTAINING CARBON ADSORBENTS FROM LOCAL WOOD
Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, E-mail: rpaygamov@mail.ru
Abstract. Background. Presently, the problem of pollution of the environment becomes significant all over the world. The need for both the discharge of wastewater and the solution of the problem of their reuse, connected with the deficit of fresh water in Republic, stipulates the requirements to applied dsorbents. Thus, the development of new types of treatment on the basis of local raw materials, as well as the development of local adsorbents, reagents and their use is one of the actual problem for the purification of industrial wastewater.
Purpose. Obtaining new carbon adsorbents on the bases of local raw materials while studying influence of temperature of thermal pyrolysis and degree of grinding on porosity of the resulting adsorbents.
Methodology. Porosity of adsorbents thermal pyrolysis was carried out at 400 °C by carbonization of coals, i.e. high-temperature heating without oxygen access. Determination of porosity by acetone was carried out in accordance with GOST 6217-52
Originality. The optimal temperature of thermal pyrolysis 400 °C was determined, in which the maximum porosity of the charcoals with a size between 1-2 mm is reached.
Findings. Dependence of the porosity of coal from temperature of thermal pyrolysis and degree of grinding is studied. The optimal temperature of thermal pyrolysis 400 °C was determined, in which the maximum porosity of the charcoals with a size between 1-2 mm is reached. Porosity of coal obtained from wood oak and ash-tree processed at 400 °C makes 75.4 and 75.7%, respectively. Porosity of the ash coal in the size between 1-2 mm is closer to the control sample of birch activated coal (BAC).
Keywords: charcoal, pyrolysis, adsorbent, ash coal, chinar coal, ash content, humidity.
Highlights:
* A highly efficient adsorbent from oak and ash woods is obtained;
* Import-substituting coal adsorbent on the basis of wood;
* Optimal conditions for obtaining carbonaceous adsorbents were developed.
To cite this article: R.A. Paygamov, D.S. Salikhanova, I.D. Eashmetov, D.J. Jumaeva. Obtaining carbon adsorbents from local wood // Uzbek chemical journal.- 2018. – Nr2. – Pp.28-32.
Received: 23.01.2018; Accepted: 23.04.2018; Published: 27.04.2018.
References
1. Business plan. The production of charcoal demo // www.business35.ru MA "NAVIGATOR", -P. 5-7.
2. Budnitskii, G. A., Matveev V. S., Kazakov M. E. // Chem. fibers. 1993. No. 5. Pp. 19-22.
3. Kumar M., Gupta R. C. // Energy Sources. 1998. V. 20, No. 7. P. 575-589.
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6. Bogdanovich N. And. Tsaplin, S. A., Kuznetsova L. N. // 2nd meeting of the wood chemistry and organic synthesis. Syktyvkar. 1996. -P.115.
7. Samoilova N. Ah. // 3-I Resp. Conf. by intensification. Neftekhim. Processes, “Petrochemistry-94”: Proc. Dokl. Nizhnekamsk, 1994. -C. 176-177.
8. Yuriev U. L., Nichkov N. // Hydrolytic and wood chemical industry. 1991. No. 8. C. 10.
9. Keltsev N. In. The basics of adsorption technology. M., 1984. -512 p.
10. Bogdanovich N. A., Dobele G. V., Kuznetsova L. N., Tsaplina S. A. / Izv. Higher education. got him. Forest magazine. 1998. No. 2-3. C. 153-166.
11. E. Y. Belyaev, production and use of wood activated carbons for environmental purposes// Chemistry of vegetable raw materials. 2000. No. 2. C. 5–15.
12. Kolyshkin D., Mikhaylova K. K., Active coals. Handbook. Leningrad: Chemistry.-1969.- P. 284.
13. Eshmetov I. D. Adsorption method of wastewater treatment of oil refining by local coal adsorbents. Diss. Tashkent, NUU, -2011.- P. 58-62.
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ORGANIC CHEMISTRY
UDK 661.717.3
B. B. Eshmuratov, *A. T. Djalilov, *M. U. Karimov
A STUDY OF THE SYNTHESIS ETHANOLAMINES FROM ETHYLENE OXIDE
JSC "Uztransgaz", *S.U.E. Tashkent Scientific - Research Institute of Chemical Technology, E-mail: adler_219@mail.ru
Abstract. Background. One of the most pressing issues of our republic is the implementation of the production of ethanolamines based on local raw materials. The raw material base of ethanolamines are ethylene oxide and ammonia, which are derived from ethylene present in sufficient quantities in our country.
Purpose. To improve the efficiency synthesis step of production of ethanolamines, providing the maximum yield of ethanolamines in the reaction mixture.
Methodology. Chemical methods for determining the kinetics of the reaction of ethylene oxide with ammonia and the resulting product composition.
Originality. The scientific novelty of this work consists in the following: definition of optimal conditions for obtaining ethanolamines based on ethylene oxide; establishment of optimal compositions for targeted ethanolamines.
Findings. It was determined that the optimum ratio of ammonia and ethylene oxide to produce ethanolamines is 1:21, and the optimum temperature - 70 0C. Experimental data show that the permissible content of 60-70% DEA output is achieved at an initial molar ratio of ammonia-ethylene oxide 1: 17-21 and the degree of conversion of 70-80%, which allows to determine the upper limit on the degree of conversion of 80%.
Keywords: ethanolamines, ethylene oxide, ammonia, monoethanolamine.
Highlights.
* Determination of the optimal conditions for ethanolamines;
* The optimum compositions for obtaining diethanolamines were established.
To cite this article: B. B. Eshmuratov, A. T. Djalilov, M. U. Karimov. A study of the synthesis ethanolamines from ethylene oxide // Uzbek chemical journal.- 2018. – Nr2. – Pp.33-37.
Received: 07.09.2017; Accepted: 07.04.2018; Published: 27.04.2018.
References
1. Ethanolamines: Technical Bulletin/«Oxiteno». Brazil, 2002. - 4 р.
2. Ethanolamine. Monoethanolamine, diethanolamine,triethanolamine: Technical bulletin/ "Dow Chemical Company". Midland, USA, 2003. - 20 p.
3. Chemical Profile ethanolamines - brief article//Chemical Market Reporter.2001. June 11.
4. Chemical Profile etanolamines// Chemical Market Reporter. - 2004, July.
5. Patent №2162461 of RF, MKI S07S213 / 04 Sposob polucheniya etanolaminov/ Rileyev G.I., Mikhailova T.A., Nikuschenko N.T., Lugovskoy S.A. (RF) -№2000112562/04, zayavl. 22.05.2000, opubl. 27.01.2001 Bulletin No.3
6. Patent №2167147 of RF, MKI S07S215 / 08 Sposob polucheniya etanolaminov/ Rileyev G.I., Mikhailova T.A., Nikuschenko N.T., Lugovskoy S.A. (RF) -№2000119218/04, zayavl. 20.07.2000, opubl. 20.05.2001 Bulletin 14.
7. Patent №2225388 of RF, MKI, MKI S07S 213/04. Sposob polucheniya etanolaminov/ T.A. Mikhailova, S.A. Lugovskoy, N.T. Nikuschenko, M.I. Nagrodsky, I.A. Lavrentiev (Russia). №2003105171/04; zayavl. 21.02.2003, opubl. 10.03.2004, Bull. No. 7.
8. Sarkisov P.D. Problemi energo- i resursosberejeniya v himicheskoy technologii//Himicheskaya promishlennost, 2000, No.1. P.19-25.
9. V.P. Gruzinov Ekonomika predpriyatiya. - M .: Finansi and Statistika, 2000. 326 s.
10. Djalilov A.T., Khamidov A.A., B.B. Eshmuratov, Karimov M.U. Issledovanie polucheniya okisi etilena iz etilena//VIII Mejdunarodnaya nauchno-tekhnicheskaya konferensiya "Gorno-metallurgicheskiy komleks: dostijeniya, problemi i sovremennie tendensii razvitiya", Navoiskiy gosudarstvenniy gorniy institut, g. Navoi, 19-21 Noyabr 2015. S. 18-19
11. Djalilov A.T., Khamidov A.A., B.B. Eshmuratov, Karimov M.U. Izucheniya sinteza etanolaminov iz etilenhlorgidrina // VIII Mejdunarodnaya nauchno-tekhnicheskaya konferensiya "Gorno-metallurgicheskiy komleks: dostijeniya, problemi i sovremennie tendensii razvitiya", Navoiskiy gosudarstvenniy gorniy institut, g. Navoi, 19-21 Noyabr 2015. S. 13-14
12. Djalilov A.T., Khamidov A.A., Eshmuratov B.B., Karimov M.U. Issledovanie sinteza etanolaminov// Respublikanskaya nauchno-tekhnicheskaya konferensiya “Aktualnie problemi innovatsionnikh tekhnologiy himicheskoy, neftegazovoy I pishevoy promishlennosti” Tashkent-2015., 18-20 Noyabr. S. 33-34
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UDK 678.686.019
A. M. Erkaev, A. T. Djalilov, F. N. Nurkulov, H. S. Beknazarov
SYNTHESIS AND INVESTIGATION OF EPOXY BINDERS AND THEIR COMPOSITES IN HIGH-COMPLETE POLYMER MATERIALS
OOO Tashkent Scientific Research Institute of Chemical Technology; Uzbekistan, E-mail: nfayzulla@mail.ru
Abstract. Background. Currently, epoxy binders and composites are used in the construction industry as glue, protective and polymeric materials. The raw material base of metal-containing epoxy binders is epichlorohydrin and adduct.
Purpose. Increasing the production efficiency of metal-containing epoxy binders and its composites in highly filled polymeric building materials improves the physicochemical characteristics of these materials
Methodology. In the present work we used methods for determining the composition and structure of the epoxy binders and its compositions prepared by the IR spectroscopic method and the electron microscope method with elemental analysis
Originality. New polyfunctional metal-containing epoxy binders based on epichlorohydrin with an adduct were synthesized, and composites of highly filled polymeric building materials were obtained on their basis.
Findings. It was found that the optimum ratio of epichlorohydrin to adduct is 5: 1, the temperature is 90 0С, the yield is 80%. The data show that the allowable content of metal-containing epoxy binders is achieved at the initial molar ratio, which makes it possible to determine the upper limit of the degree of conversion at 80%.
To produce the composite material, a calcium hydroxide filler was used, and sulfur, nitrogen and a metal-containing epoxy oligomer of the SNED-3 brand and high-pressure polyethylene of the F-0220S brand (LDPE) were used as a binder. The amount of filler in the polymer matrix was 40 wt. h, this amount is optimal for compositions based on calcium hydroxide excipient with SNED-3 and polyethylene.
Keywords: metal-containing epoxy binders, epichlorohydrin, adduct, elemental analysis, high fillers.
Highlights.
* Epoxy binders were prepared, with a yield of 80%.
* Тheir compositions by IR spectroscopy, an electron microscope with elemental analysis.
To cite this article: A. M. Erkaev, A. T. Djalilov, F. N. Nurkulov, H .S. Beknazarov. Synthesis and investigation of epoxy binders and their composites in high-complete polymer materials // Uzbek chemical journal.- 2018. – Nr2. – Pp.38-43.
Received: 23.03.2017; Accepted: 17.04.2018; Published: 27.04.2018.
References
1. Ogrel L.YU., Strokova V.V., Chebotareva Ye.G., Vladimirova V.A.. Nanomodifitsirovannyye epoksidnyye svyazuyushchiye s povyshennymi kharak-teristikami// Vestnik BGTU im. Shukhova. –Belgorod, 2009. -No.3. -S. 6.
2. Chebotareva, Ye.G. Kompozity na osnove modifitsirova nnykh epoksidnykh ol igomerov s vysokimi ekspluatatsionnymi kharakteristikami // Fundamentalnye issledovaniya. –M.: Akademiya yestestvo -znaniya, 2007. –Ch. 2. –S. 339-340 / ISSN1812-7339.
3. Shelly Simchaemail, Ana Dotan, Samuel Kenigemail and Hanna Dodiu kemail. Characterization of Hybrid Epoxy Nanocomposites. Nanomaterials 2012, No. 2(4), 348-365p.
4. Nanocomposites based on polyurethane or polyurethane-epoxy hibrid resins prepared avoiding isocyanates: пат. US 2007/0135588 A1 США. No 10 /567945; заявл. 13.08.2004; опубл. 14.06.2007.
5. Kadykova, YU.A. Napolnennyye bazal'tom epoksidnyye kompozitsionnyye materialy // Plasticheskiye massy. – 2013. – No.2. – S. 31-33.
6. Jeong Tai Kim. 3-Aminopropyltriethoxysilane effect on thermal and mechanical properties of multi-walled carbon nanotubes reinforced epoxy composites //Composite Materials. – 2009. – V. 43, no. 22. – p. 2533-2541.
7. Brinkmann S. At al. International Plastics Handbook the Resource for Plastics Engineers. – Ed. Hanser. – 2006. – 920 p.
8. Kruglova, A.N. Struktura i svoystva radiatsionno-zashchitnykh epoksidnykh kompozitov na appretirovannom napolnitele: dis. kand. tekhn. nauk: 05.23.05 / Kruglova Albina Nikolayevna. – Penza, 2011. – 270 s.
9. Mariam Al-Ma'adeed, N.J. Al-Thani Effect of Gamma Irradiation on the Microstructure and Morphology of Polyethylene Oxide and Polyvinyl Alcohol Blends / Mariam Al-Ma'adeed, N.J. Al-Thani // Advanced Materials Research. – 2009. – V. 83-86. – P. 524-529.
10. Starovoytova, I.A. Strukturoobrazovaniye v organo-neorganicheskikh svyazuyushchikh, modifitsirovannykh kontsentratami mnogosloynykh uglerodnykh nanotrubok // Stroitel'nyye materialy. – 2014. – No.1-2. – S. 12-20.
11. Wang, H. Hybrid Effect of Carbon Fiber on Piezoresistivity of Carbon Nanotube Cement-Based Composite / H. Wang, B.J. Zhang, X.Z. Liu, D.Z. Luo, S.B. Zhong // Advanced Materials Research. – 2010. – V. 143-144. – P. 639-643.
12. Jian, L.L. Effect of Compressive Strain on Electrical Resistivity of Carbon Nanotube Cement-Based Composites // Key Engineering Materials. – 2011. – V. 483. – P. 579-583.
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UDK 541.64.547.39
U. М. Мirzayev, O. H. Hasanov, K. K. Baltabayev, А. I. Ismailov
COPOLYMERIZATION OF N-METHYLOLACRYLAMIDE WITH N-VINYLLACTAMS
Tashkent State Technical University, Tashkent, Uzbekistan, alisher3637@mail.ru
Abstract. Background. The activity of N-methylolacrylamide, N-vinylpyrrolidone and N-vinyl lactam, the copolymerization rates of N-methylolacrylamide with N-vinyl lactams and also the polarity of the monomers have been determined in the article. The obtained dependences make it possible, by varying the composition of the monomer mixture and the synthesis conditions, to obtain products of a given composition and a certain degree of alternation. The influence of methylolamide groups on the relative activity of monomers in the course of deep homophase copolymerization is determined.
Purpose. The aim of the study is to determine the copolymerization constants, activity and polarity of monomers. Obtain dependencies by varying the composition of the monomer mixture and the synthesis conditions, obtaining products of a given composition and determining the degree of alternation. Determine the effect of methylolamide groups on the relative activity of monomers during deep homophase copolymerization.
Methodology. Investigation of the kinetics of radical copolymerization of N-methylolacrylamide with N-vinyllactams in dimethylformamide, and dilatometric studies using dinitrilazobisisobutyric acid as an initiator. Determination of the intrinsic viscosity in a Ubbelohde viscometer. Study of the compositions of the obtained copolymers by elemental analysis and IR spectroscopy.
Originality. Synthesis and study of some properties of copolymerization of N-methylolacrylamide with N-vinylpyrrolidone and N-vinylcaprolactam.
Findings. High-molecular compounds having different functional groups that do not require additional activation and ways to enter into various chemical reactions under rather mild conditions are synthesized.
Keywords: N-methylolacrylamide, alkylolacrylamide, polarity factor, relative activity, dispersion, degree of non-uniformity.
Highights:
* Copolymers of N-methylolacrylamide with N-vinylpyrrolidone and N-vinylcaprolactam were synthesized;
* Constants of copolymerization, activity, polarity of monomers, viscosity
* Composition of the obtained copolymers was studied.
To cite this article: U. М. Мirzayev, O. H. Hasanov, K. K. Baltabayev, А. I. Ismailov. Copolymerization of N-methylolacrylamide with N-vinyllactams // Uzbek chemical journal.- 2018. – Nr2. – Pp.43-49.
Received: 28.02.2017; Accepted: 11.04.2018; Published: 27.04.2018.
References
1. SHaglaeva N.S. Sopolimeryi N- i C-vinilzames`hennyih proizvodnyih azotsoderzhas`hih geterociklov, akril- i metakrilamidov // Dis. d-ra him. nauk, Irkutsk, 2006, 298 s.
2. Sun L.P., Du Y.M., Shi X.W., Chen X., Yang J.H. Synthesis and characterization of polyacrylamide-grafted chitosan hydrogel microspheres for the controlled release of indomethacin // Journal of Applied Polymer Science, 2006, 1525-1536.
3. SHatalov G.V., CHurilina E.V., Kuznecov V.A., Verezhnikov V.N. Sopolimerizaciya vinilkaprolaktama s vinil-(benz)imidazolami i svoystva vodnyih rastvorov sopolimerov // Vyisokomolekulyarnyie soedineniya. -Moskva, Seriya B, 2007, tom 49, No 3, s. 542-547.
4. Ignatova M., Manolova N., Rashkov I. Novel antibacterial fibers of quaternized chitosan and poly(vinyl pyrrolidone) prepared by electrospinning // Eur. Polym. J. 2007, p. 1112-1122.
5. Panarin E.F. Biologicheski aktivnyie polimernyie nanosistemyi // Innovaciya. -Moskva. -2008. -No6. -S.50-53.
6. Military M. Synthesis and characterization of a novel superabsorbent polymer of N,O-carboxymethyl chitosan graft copolymerized with vinyl monomers // Journal of Applied Polymer Science. USA, 2008, p. 255-261.
7. Kizhnyaev V.N., Krahotkina YE.A., Petrova T.L., Ratovskiy G.V., Tyukalova O.V., Pokatilov F.A., Smirnov A.I. Sopolimerizaciya 5-viniltetrazola s N-vinillaktamami i svoystva poluchaemyih sopolimerov // Vyisokomolekulyarnyie soedineniya. -Moskva, Seriya B, 2010, tom 52, No 8, s. 1523-1529.
8. Prokopchuk N.R., Krut`ko YE.T., Globa A.I. Himicheskaya modifikaciya plenkoobrazuyus`hih ves`hestv // BGTU, Minsk 2012. - 381 s.
9. Jaroslava Kondelikova, Jan Sejba, Jaroslav Kralicek, Zdena Smrckova. Polymerization of lactams Copolymerization of 6-caprolactam with some of its non-homopolymerizing derivatives // Macromolecular Materials and Engineering, Volume 88, 2012, P.103-111.
10. Huseyin Esen. Synthesis and characterization of linear dendritic homo and copolymers acrylated behera amine // Journal Designed Monomers and Polymers, 2015, p. 745-752.
11.Krebs A., Bruchmann B., M?ller-Cristadoro A., Al-Hellani R., Schluter A.D. Copolymerization of a dendronized monomer with styrene and different acrylates: determination of reactivity ratios // J. Polym. Sci. A Polym. Chem. 2012; p. 1372-1377.
12. Schonamsgruber J., Schade B., Kirschbaum R. Synthesis and aggregation properties of polycationic perylenetetracarboxylic acid diimides // Eur. J. Org. Chem. 2012. p. 6179-6186.
13. Jalvandi J., White M., Truong Y.B., Gao Y., Padhye R., Kyratzis I.L. Release and antimicrobial activity of levofloxacin from composite mats of poly(ɛ -caprolactone) and mesoporous silica nanoparticles fabricated by core-shell electrospinning // J. Mater. Sci. 2015, p. 7967-7974.
14. Ayupova M.B., Mirzaev U.M., Kamilzhanov N.A. Oksadiksilning polimerli komplekslarni kalorimetrik usulda ¢rganish // Uzbekistan kimyo zhurnali. -2012. -No2. -S.27-30.
15. Mirzaev U.M., Ismailov I.I. (So)polimeryi akrilamida i ego proizvodnyih s N-vinillaktamami // Monografiya, -Tashkent. TashGTU, -2014. -174 s.
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UDC: 685.315:541.64:678
A. T. Ibragimov, A. S. Rafikov
SPECTRAL METHODS STUDY OF THERMOPLASTIC COPOLYMERS FOR THE MANUFACTURE OF SHOE SUSPENDED MATERIALS
Tashkent Institute of Textile and Light Industry, Uzbekistan, e-mail: abdusattor.ibragimov1963@mail.ru
Abstract. Background. Analysis of the search for information and literature sources show that most of the polymer materials used for making shoe soles are obtained in a synthetic way; the principles of their creation are based on the laws of chemistry and physics of high-molecular compounds, proceeding more often by a radical mechanism. In order to create polymer shoe compositions, with the subsequent manufacture of synthetic plantar materials based on them, the synthesized thermoplastic acryl ate and vinyl copolymers were studied by infrared (IR) and ultraviolet (UV) spectroscopic analysis methods.
Purpose: to establish a scheme for the formation and composition of copolymers of acrylonitrile with butyl methacrylate (AN-BMA) and low-density polyethylene with vinyl acetate (LDPE-VA) using local raw materials.
Methodology: IR and UV spectroscopy.
Originality. The copolymer for shoe soles was synthesized by inoculating copolymerization of LDPE with BA, the copolymer of AN and BMA was synthesized by emulsion polymerization.
Findings. Using IR and UV spectroscopic methods, the mechanism of formation of graft copolymers and their composition are substantiated, depending on the ratio of the initial components of the mixture.
Key words: acrylonitrile, butyl methacrylate, vinyl acetate, low density
Highlights:
* The bands of absorption of chromophore groups.
* Absorption and deformation vibration absorption bands.
To cite this article: A. T. Ibragimov, A. S. Rafikov. Spectral methods study of thermoplastic copolymers for the manufacture of shoe suspended materials // Uzbek chemical journal.- 2018. – Nr2. – Pp.49-56.
Received: 11.01.2018; Accepted: 06.03.2018; Published: 27.04.2018.
References
1. Altzitser V.S., Krasovskiy V.N., Meerson V.D., Fomchenkova L.N., Nikitina L.L. Poliuretani dlya niza obuvi / STEP. - 1999. - No5. - S. 84-85.
2. Karabanov P.S., Jixaryov A.P., Belgorodskiy V.S. Polimerniye materiali dlya niza obuvi. - М.: Akademiya, 2006. - 206 s.
3. Chernix E.I., Moskalets T.A., Karabanov P.S., Xen G.B. Vliyaniye retsepturi podoshvennogo PVH - plastikata na svostva litevih izdeliy / Istoricheskiye aspekti i dostijeniya obuvshikov: Yubileyniy mejdunarodniy sbornik nauchnih trudov, g. Shahti: YuRGUES, 2001. - S. 168-173.
4. Fitkan L.Ye. Perspektivi primeneniya termoelastoplastov vmesto obichnih kauchukov / Per. sangl. - M.: "Elastomeric", 1983. - No 6, - S. 21-26.
5. Kolishkin N.N., Shandra T.V., Goldshteyn S.G. Issledovaniye litevih kompozitsiy na osnove poliuretanov i ТEP k deystviyu agressivnih sred. / «Noviye tehnologii v proizvodstve koj i obuvi». - М.: 1988. - S. 80-95.
6. Nikitina L.L. Sovremenniye polimerniye materiali, primenyaemiye dlya niza obuvi / L.L.Nikitina, G.I.Garipova, О.E.Gavrilova // Vestnik Kazan. tehnologicheskogo universiseta.– 2011. – Т.XIV. - No 6. – S. 150-155.
7. Sozdaniye polimernih kompozitsionnih materialov dlya niza obuvi na osnove mestnogo sirya/ А.T.Ibragimov, U.М.Мaksudоvа, А.S.Rafikov // Uzbekskiy nauchno-tehnicheskiy I proizvodstvenniy jurnal «Kompozitsionniye materiali», No 1/2016, S. 45-49.
8. Razrabotka rekomendatsiy po ispolzovaniyu sirevih resursov Uzbekistana dlya proizvodstva polimernih kompozitsiy dlya niza оbuvi / А.T.Ibragimov, U.М.Мaksudоvа, А.S.Rafikov, D.Kasimhodjayev // YuRGUES, “Tehnicheskoye regulirovaniye – bazovaya osnova kachestva materialov, tovarov i uslug”, Mejdunarodniy sbornik nauchnih trudov, “Donskoy gosudarstvenniy tehnicheskiy universitet” v g. Shahti, Rostovskoy oblasti (ISO I P (filial) DGTU). 14 – 15 marta 2013 g., S. 114-115.
9. Nikitina L.L. Polimerniye materiali v obuvi s uluchshennimi ergonomicheskimi hаrakteristikami / L.L.Nikitina, Т.V.Jukovskaya, R.М.Galyalutdinova // Vest. Каzan. tehnol. un -ta. – 2012, Т.15. - No 7. – S. 121-124.
10. Polucheniye аkrilatov dlya polimernoy podoshvi obuvi / А.Т.Ibragimov, U.М.Маksudova, А.S.Rafikov // Jurn. «Problemi tekstilya». Таshkent, 2015, No 2, - С. 67-71.
11. Poristiye rezini na оsnove моrоzоstоykogo kauchuka SКМS-10 RКP / Аrseneva G.S., Bogdanova N.N., Bukanov N.N. // Маtеriali dokladov 4 Vserossiyskoy коnfеrеntsii "Каuchuk I Rezina - 2014: traditsii i innovatsii", Моskvа, 23-24 apr., 2014. - М., 2014. - S. 73-74.
12. Fomchenkova L.N. Sovremenniye polimerniye materiali dlya niza obuvi / Kojevenno-оbuvnaya promishlennost. - 2009. - No 4. - S. 25 - 30.
13. Fiziko-himicheskiye svoystva аkrilоvih i vinilovih sopolimerov dlya obuvi / А.Т.Ibragimov, D.А.Fayzullayeva, А.S.Rafikov // Uzbekskiy himicheskiy jurnal, Таshkent, 2016, No5, S. 60-65.
14. Теmirov О.Sh. 15 let Shurtanskomu GXK – оdna iz pervih lastochek nezavisimosti / Uzbekskiy nauchno-tehnicheskiy jurnal Nefti i Gaza. Spetsialniy vipusk, may, 2016. – S. 29-32.
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UDK 665./.7: 66.9
A. M. Hurmamatov, O. Y. Ismailov, 1J. A. Haydarov
DETERMINATION OF THE COEFFICIENT OF SURFACE TENSION OF OIL-GAS CONDENSATE AND THEIR MIXTURES
Institute of general and inorganic chemistry of Academy of Sciences of Uzbekistan. Tashkent c. Uzbekistan. e-mail: ismoilovnmpi@mail.ru
1Namangan Engineering-Technology Institute c. Namangan
Abstract. Background. One of the interesting and important values for oil refining and petrochemical industry is the surface tension coefficient. The coefficient of surface tension is necessary for the calculation of technological equipment, in particular, the diameter of the tray column, the velocity of the liquid flow, the calculation of the extraction columns and the intensity of the mixing processes. In addition, the surface tension of the fuel has a strong influence on the degree of its dispersion in the combustion chambers of the air-jet engines. Surface tension plays an important role in phenomena associated with evaporation, boiling, condensation, chemical reactions in heterogeneous systems, and in the process of dehydration of crude oil, so studying the surface tension of oil, gas condensate and their mixtures is the most important task in oil refining.
Purpose. To study the effect of surfactants (surfactants) on the surface tension of oil, gas condensate and their mixtures.
Methodology. To determine the surface tension of oil, gas condensate and their mixtures, we chose the drop-drop method.
Originality. The reduction of the surface tension of hydrocarbon raw materials with the addition of surfactants has been established.
Findings. Calculation and experimental studies have shown that the surface tension depends on the composition and temperature of oil and gas condensate mixtures. With the increase in the share of gas condensate in the mixtures and the increase in temperature, the viscosity and density change, while the surface tension decreases. Within the temperature range of 20 ÷ 40 оС, the surface tension (N / m 10-3) of oil and gas condensate is reduced by 1.03 times. With the increase in the share of demulsifier in oil, gas condensate and their mixtures to 0.2%, the surface tension of oil is reduced by 1.057 times, for gas condensate by 1.229 times.
Key words. Oil, gas condensate, mixture, viscosity, density, droplet separation, tension surface.
Highlights.
* With the introduction of a surfactant into the liquid, the surface tension decreases.
* With a decrease in the surface tension of hydrocarbons, the resistance of the apparatus decreases.
To cite this article: A. M. Hurmamatov, O. Y. Ismailov, J. A. Haydarov. Determination of the coefficient of surface tension of oil-gas condensate and their mixtures // Uzbek chemical journal.- 2018. – Nr2. – Pp.57-64.
Received: 16.03.2018; Accepted: 26.04.2018; Published: 27.04.2018.
References
1. Naziev Ya.M., Gasanov G.T., Naziev D.Ya., Gasanov V.G. Poverhnostnoe natyazhenie predel`nyih uglevodorodov// Jurnal "IVUZ" Problemyi yenergetiki. - Kazan - 2005. No1. - S. 46-53.
2. Dzheykok M., Parfit D.J. Himiya poverhnostey razdela faz. Mir. -1984. - 269 s.
3. Pavlov K.F., Romankov P.G., Noskov A.A. Primeryi i zadachi po kursu processov i apparatov himicheskoy tehnologii. Uchebnoe posobie dlya vuzov/ Pod red. P.G. Romankova. - 10-e izd., pererab. i dop.- L.: Himiya, 1987. - 576 s.
4. Raschetyi osnovnyih processov i apparatov neftepererabotki: Spravochnik /Rabinovich G.G., Ryabyih P.M., Hohryakov P.A. i dr.; Pod red. E.N.Sudakova. - 3-e izd., pererab. i dop. - M.: Himiya, -1979. - S.568,
5. Sardanashvili A.G., Lvova A.I. Primeryi i zadachi po tehnologii pererabotki nefti i gaza. Uchebnoe posobie dlya studentov neftyanyih special`nostey vuzov. - 2-e izd., pererab. i dop. - M.: Himiya, -1980. - 256 s.
6. Nemzer B.V. Eksperimental`naya ustanovka dlya issledovaniya poverhnostnogo natyazheniya zhidkostey// Vklad molodyih uchenyih i specialistov v razvitie neftepererabotki, neftehimii i avtomatizacii upravleniya tehnologicheskimi processami. Tezisyi doklad respublikanskoy konferencii -Groznyiy. -1980. - S.79.
7. Ismailov O.Yu. Opredelenie koyefficienta poverhnosti natyazhenie zhidkih uglevodorodov/ II- Mezhdunarodnaya nauchno-tehnicheskaya konferenciya Innovacionnyie razrabotki v sfere himii i tehnologii topliv i smazyivayus`hih materialov. 19-20 oktyabrya 2017 g. - Buhara. - S. 190-193.
8. Ismailov O.Yu., Hudayberdiev A.A., Sayidmurodov M.M. Izuchenie vyazkosti nefti, gazovogo kondensata i ih smesey// Mejdunarodnyiy nauchno-tehnicheskiy zhurnal "Himicheskaya tehnologiya. Kontrol i upravleniya". - Tashkent, 2012. - No6. - S. 50-54.
9. Shterenliht D.V. Giravlika: Uchebnik dlya vuzov. - V 2-h kn.: Kn. 1. - 2-e izd., pererab. I dop. - M.: Energoatomizdat, 1991. - 367 s.
10. Vladimirov A.I., Shelkunov V.A., Kruglov S.A. Osnovnyie processyi i apparatyi neftegazopererabotki: Uchebnoye posobie dlya vuzov. - M.: OOO "Nedra-Biznescentr", 2002. - 227 s.
11. Hurmamatov A.M. Gidrociklonnaya ustanovka dlya glubokoy ochistki neftegazokondensatnoy smesi ot mehanicheskih primesey// Nauchno-tehnicheskiy zhurnal "Himicheskaya promyishlennost`". Sankt-Peterburg, 2013, No8. -C. 392-394.
12. Hurmamatov A.M. Opredelenie gidravlicheskogo soprotivleniya laboratornoy gidrociklonnoy ustanovki// Nauchno-tehnicheskiy zhurnal "Himicheskaya promyishlennost`". Sankt-Peterburg, 2013, No8. -C. 395-397.
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UDK 543.645.2: 543.421/.422: 543.42.062
A. A. Janibekov, N. Z. Mamadalieva
HPTLC METHOD FOR THE QUANTIFICATION OF 20-HYDROXYECDYSONE IN SILENE WALLICHINA
Institute of the Chemistry of Plant Substances of the Academy Sciences of Uzbekistan, 100170 Tashkent, Uzbekistan E-mail: j.aziz@mail.ru
Abstract. Background. High-Performance Thin-Layer Chromatography (HPTLC) is a simple, flexible and cost efficient method for quantitative analysis. Analysis can be performed easily in short time and requires small amount of the sample. Silene wallichiana (Caryophyllaceae) have been previously shown to contain 20-hydroxyecdysone (20E) and recognized as a perspective source of ecdysteroids. From the literature survey and to our best knowledge no previous report is available on determination and quantification of 20E in Silene species using HPTLC.
Purpose: The aim of the work is to develop a simple, rapid, selective and cost effective HPTLC method for the determination and quantification of 20E in S. wallichina.
Methodology: HPTLC method was developed for the estimation of 20E in S. wallichina. The method employed TLC aluminum plate precoated with silica gel 60F254 as the stationary phase. The solvent system employed consisted of THF / toluene / 1mM TFA in MeOH / H2O (16:8:2:1, v/v/v/v). Quantitative analysis was performed by densitometric scanning at 249 nm.
Originality: This is the first time that an HPTLC densitometric method was applied to quantify the amount of the 20E in the methanol extract of S. wallichiana.
Findings: We are the first to report the HPTLC analysis of methanol extract S. wallichina. The plant material was extracted with methanol and analyzed by HPTLC for 20E content. Results of HPTLC analysis showed that the content of 20E was 131.6 µg/mg (dry mass) in S. wallichiana.
Key words: Silene wallichiana, HPTLC, 20-hydroxyecdysone, quantification
Highlights:
* Methanol extract of Silene wallichiana;
* Quantity of 20-hydroxyecdysone in Silene wallichiana;
* HPTLC method development for the quantification of 20-hydroxyecdysone
To cite this article: A. A. Janibekov, N. Z. Mamadalieva. HPTLC method for the quantification of 20-hydroxyecdysone in Silene wallichina // Uzbek chemical journal.- 2018. – Nr2. – Pp.64-69.
Received: 18.01.2018; Accepted: 26.02.2018; Published: 27.02.2018
References
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9. Alam P., Alqasoumi S.I., Shakeel F., Abdel-Kader M.S. (2011) HPTLC densitometric analysis of arbutin in bulk drug and methanolic extracts of Arctostaphylos uva-ursi. Nat. Prod. Res. 25: 1671-1675.
10. Ali B., Mujeeb M., Aeri V., Mir S.R., Ahmad S., Siddique N.A., Faiyazuddin M., Shakeel F. (2011) High-performance thin layer chromatographic quantification of bioactive psoralen and daidzein in leaves of Ficus carica L. Nat. Prod. Res. 25: 1666-1670.
11. International Conference on Harmonization (ICH) of Technical Requirements for Registration of Pharmaceuticals for Human Use, Harmonised Triplicate Guideline on Validation of Analytical Procedures: Methodology, Recommended for Adoption at Step 4 of the ICH process on November 1996 by the ICH Steering Committee, IFPMA, Geneva.
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UDC: 547.787.3
К. Giyasov, Z. Mukhidova
ALKYLATION OF BENZOXAZOLOLONES AND BENZOXAZOLINETHONINE BY TRIPHYLENBROMETHANE
Tashkent State Agrarian University
Abstract. Background. The government drew attention to the need for a broad development of scientific research on the development of herbicides, fungicides and preparations for the control of pests of agricultural crops, organizing search and industrial production of new pesticides.
Purpose of this study is to find new pesticides that would easily degrade and not accumulate in the environment. In this connection, it was necessary to develop new methods for the preparation of alkylzoloxazolinones and benzoxazolinethions, as well as new classes of organic compounds.
Methodology: Structure by analysis, take of IR and mass spectra.
Originality: The reaction of alkylation of benzoxazolinone with triphenylbromomethane was studied. The method for the preparation of new heterocyclic compounds -3-trityl-benzoxazolinones was proposed.
Findings: The synthesized compounds were tested as fungicides, in the laboratory of the CRPS (Chemical research of plant substances) AS (Academy of Sciences) of the Republic of Uzbekistan. These compounds show a fungicidal
Key words: benzoxazalinone, 3-tritylbenzoxazolinone, 3-trityl-6-chlorobenzoxazolinone, 3-trityl-6-bromobenzoxazolinone, 2-benzylthiobenzoxazole.
Highlights:
* Alkylation of benzoxazolinones and benzoxazolinethonine with triphenylbromomethane
* A metod for obtaining fungicidal preparations has been developed.
To cite this article: К. Giyasov, Z. Mukhidova. Alkylation of benzoxazololones and benzoxazolinethonine by triphylenbromethane // Uzbek chemical journal.- 2018. – Nr2. – Pp.69-74.
Received: 23.02.2018; Accepted: 07.04.2018; Published: 27.04.2018
References
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