Volume Nr 1
PHYSICAL CHEMISTRY
UDK 546.41
M.R.Ibragimova, T.A.Azizov, А.G.Pogosyan, O.I.Semenova
COMPLEX COMPOUNDS OF CALCIUM NICOTINATE WITH AMIDES
Institute of General and Inorganic Chemistry AS RUz, Tashkent c., е-mail:mavluda@gmail.com
Abstract. Background. In modern coordination chemistry in the section of solid state chemistry metal complexes containing in their ligand environment different N,O-donor centers take a special place. They are good models for the study of competitive coordination problems in the chemistry of complex compounds due to the specific action of their environment on the stereochemistry of polyhedrons.
Purpose. Determination of the synthesis conditions, the establishment of the composition and structure of coordination compounds with amide, nicotinamide and calcium nicotinate. The study of the thermal behavior of new calcium coordination compounds.
Methodology. Differential thermal analysis, X-ray diffraction, infrared spectroscopy, elemental analysis.
Originality. For the first time two new coordination compounds of calcium nicotinate with СH3CONH2, CO(NH2)2, H2NCONHNO2, NС4Н5CONH2 are synthesized. Composition, individuality, the coordination mode of acid amides` and nicotinate molecule fragments were found out. Coordination of organic ligands, coordination environment of central ion of synthesized compounds were proved by vibrational spectroscopy methods. Thermal behavior of the synthesized compounds was studied too.
Findings. Composition of synthesized compounds is set by elemental analysis. Comparative consideration of interplanar space and relative intensities of free molecules of amide acids, calcium nicotinate and synthesized complexes shows that new coordination compounds differ from each other and original components as they possess individual crystal lattices. On the basis of IR spectroscopy the data collected show that the molecules of amides, nicotinic anions are coordinated around central atom through the oxygen atom and nicotinamide through the nitrogen atom of the pyridine ring.
Keywords: coordination, central atom, X-ray analysis, individuality, thermal behavior.
Highlights.
* Calcium complexes were synthesized by mechanochemical method;
* Individuality of synthesized complexes was proved by X-ray analysis;
* Coordination centers, denticity of acid residue were revealed by IR;
* Thermal behavior of synthesized compounds was studied.
Citation: M.R.Ibragimova, T.A.Azizov, А.G.Pogosyan, O.I.Semenova. Complex compounds of calcium nicotinate with amides // Uzbek chemical journal, -2017. –Nr1. –P.3-9.
Received: 05.12.2016; Accepted: 21.11.2016; Published: 15.02.2016
References
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2. Azizov O, Kadirova Z, Azizov T, Tolipov S, Ibragimov B. Catena-poly [[aqua(benzoato-k2O,O`) (benzoic acidkO) calcium]-μ3-benzoato-k4O:O,O`:O`].
Acta Cryst. 2011, E67,-P. 597
3. Ibragimova M.R. Coordination compounds of nickel-nicotinate with some acid amides - American Chemical Science Journal, 2016, 14(2): -P. 1-7.
4. Liua, Y.; , Wangb J.; ,Yanga, R.;Xuc, X.; Hydrothermal synthesis, crystal structure and antimicrobial activity of the nicotinate cobalt complex - Journal of Chemical and Pharmaceutical Research, 2013, 5(12), -P. 515-519
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6. Ibragimova M.R., Abdullaeva F.A., Khasanov Sh.B., Azizov T.A. Acid amide coordination compounds of magnesium nicotinate // Journal of Chemical Technology and Metallurgy.-Sofia, 2016, vol. 51, No.1.-Р. 47-52.
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11. Egorov-Tismenko Yu.K. Kristallografiya i kristallohimiya.- Moskva, 2005. – 589 s.
12. Kuzmicheva G.М. Poroshkovaya difraktometriya v materiallovedeniye. М: МITHT im. M.V. Lomonosova, 2005.-Ch.1. – 90 s.
13. Gabbott P.(ed.) Principles and Applications of Thermal Analysis. Singapore: Wiley-Blackwell, 2008. - 480 p.
14. Ibragimova M.R., Azizov Т.А., Hasanov Sh.B. Sintez i issledovanie smeshannokarbamidnyh koordinatsionnyh soyedineniy nikotinatov magniya i kaltsiya// Himicheskaya promyshlennost.-Rossiya -2015, -No.4.-S.176-182
15. Shulgin V.F., Sotnik S.А., Konnik О.V. Sintez speyserirovannyh trehyadernyh kompleksov na оsnove trimezinata мedi(II).// Uchyenye zapiski Tavricheskogo natsionalnogo universiteta im. V. I. Vernadskogo. Seriya «Biologiya, himiya».-Simferopol, 2010. – Т. 23 (62), No.2.- S. 263-269.
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UDK 541.183: 66.066
D.J. Jumaeva
PHYSICOCHEMICAL AND ADSORPTIVE PROPERTIES OF COAL ADSORBENTS
Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan
e-mail: d.jumayeva@list.ru
Abstract. Background. For treatment of industrial wastewater one of еру effective ways known is an adsorption based on adsorbents derived from different raw materials application, such as peat, clay, coal, etc. The most widely applicable adsorbents are activated coals, but they are basically imported and act often not so effective as should be and are relatively expensive.
Purpose. On the basis of local coals to obtain high-performance cheap adsorbents and to study them with physicochemical and adsorptive methods.
Methodology. IR spectral method for functional groups study is used applied to the initial and activated coals. Their adsorption capacity in respect to copper is determined using an ionomer I-160MI device.
Originality. On the basis of local coals new coal adsorbents are received, dependence of their physicochemical and adsorptive properties on functional groups’ nature is studied.
Findings. Using physicochemical analytic methods new coal adsorbents of technical grades 2BPK, 1SSKOM and 1T, obtained on the basis of local coals are studied resulting the functional groups’ nature understanding and characterization. The dependence of activated coals’ adsorption properties on their nature is revealed.
Keywords: coal adsorbent, industrial waste, IR - spectrometry, functional groups, adsorptive properties.
Highlights:
* Activated coal on the base of Angren coal, of brand 2BPK is designed.
* Activated coal on the base of Shargun coal, of brand 1SSKOM is designed.
* Activated coal on the base of Baysun coal, of brand 1T is designed.
Citation: D.J. Jumaeva. Physicochemical and adsorptive properties of coal adsorbents // Uzbek chemical journal, -2017. –Nr1. –P.9-15.
Received: 28.10.2016; Accepted: 24.11.2016; Published: 15.02.2016
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14. Koch A., Krzton A., Marin N., Robert D., Weber J.V. from cellulose to carbonaceous materials with controlled functionalities. FTIR in sity study // Proceedings of "EVROCARBON`98". Strasbourg. 1998. Vol.1.P.85.
15. CHubar` T.V., Vyisockaya V.N., Himchenko YU.I., Pis`hay I.YA., Nadel L.G. Obrazovanie metallsoderzhas`hih uglerodnyih sorbentov pri pirolize drevesinyi, propitannoy solyami // Ukrainskiy himicheskiy zhurnal. 1987. T.53. No.3. S.243.
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UDK 691.32:666
M.U. Karimov, A.T. Djalilov, N.A. 1Samigov
DIFFERENTIAL THERMAL RESEARCH OF THE OBTAINED SUPER- AND HYPERPLASTICIZERS
SUE Tashkent Scientific Research Institute of Chemical Technology, 1Tashkent Architecture and Construction Institute; E-mail: adler_219@mail.ru
Abstract. Background. The main directions of improving the performance of cement composites are improved manufacturability, increased strength and durability. In the modern building materials science more preference is given to the development of plasticizing additives for concrete mixtures and concrete, allowing solving several technological problems.
Purpose. Study of differential thermal analysis of obtained plasticizers.
Methodology. Data of differential thermal analysis was recorded on the derivatograph system Paulik - Paulik - Erdei at rate of 10 g / min with sample’s weight 0.114 - 0.173 g, sensitivity of galvanometers T-900, TG-200 DTA-1/10 DTG-1/20. Recording was carried out under atmospheric conditions. Holder was performed with corundum crucible, diameter of 10 mm, without cover. We used Al2O3 as reference.
Originality. In the study of differential - thermal analysis of obtained plasticizers, changes in the temperature interval at thermal processing of wet concrete mixtures were identified.
Findings. At a curve of differential thermal analysis of superplasticizer SDJ-1, 4 endo-effects in the following ranges: 403-423 K; 481-493 K; 546-559 K and 618-653 K were detected, which show the chemical and phase transitions of polymers. The first three endo-effects usually show removal of weakly or strongly bound water molecules, the beginning of the melting and decomposition of polymers. The observed exo-effects in the temperature ranges: 546-559 K; 603-618 K; 668-793 K; 833-893 K; 1023-1063 K and 1068-1113 K show stitching, increased crystallinity and oxidation of the superplasticizer SDJ-1. 2 endoeffects are observed in the following intervals at the curves of differential thermal analysis of hyperplasticizer: 313-363 K; 421-531 K, which show the removal of weakly or strongly bound water molecules, the beginning of melting and the decomposition of polymers. Exo-effects in other temperature ranges indicate stitching, increased crystallinity and oxidation of hyper-plasticizer.
Keywords: differential thermal analysis, thermogravimetry, endo- and exoeffects.
Highlights.
* Mechanism of action of superplasticizers was investigated;
* Phase changes in hyperplasticizers were studied by thermogravimetry.
Citation: M.U. Karimov, A.T. Djalilov, N.A.Samigov. Differential thermal research of the obtained super- and hyperplasticizers // Uzbek chemical journal, -2017. –Nr1. –P.16-21.
Received: 08.08.2016; Accepted: 28.10.2016; Published: 15.02.2016
References
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- Pustovgar A.P. Effektivnost primeneniya sovremennyh superplastifikatorov v suhih stroitelnyh smesyah // 4-ya Mezhdunarodnaya nauchno-tehnicheskaya konferentsiya «MixBULD». 2002. -S.123-126.
- Karimov M. U., Vafaev O.Sh., Djalilov A. T. Study of the IR spectra obtained superplasticizer and its influence on the physico-chemical and physico-mechanical properties of the cement compositions// Journal “European applied science” –Germany. –No.8. -2015. -p.77-81
- Karimov M.U., Djalilov A.T., Samigov N.A., Nurkulov F.N., Zokirov J. Synthesis and application of plasticizing additives for cement//“Modern Problems of Polymer Science” Programm and abstract book of 9 th Saint – Petersburg Young Scientists Conference, November 11-14, 2013, Saint – Petersburg, p. 41
12. Karimov M.U., Djalilov A.T., Samigov N.A. Zokirov J.S. A study of the synthesis of hyperplasticizer and its influence on the properties of cement systems// “Modern Problems of Polymer Science” Programm and abstract book of 11 th Saint – Petersburg Young Scientists Conference, November 9-12, 2015, Saint – Petersburg
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1A. T. Djalilov, X. X. Turaev, Sh. A. Kasimov, F. B. Eshkurbonov
STUDY OF KINETIC PROPERTIES OF THE COMPLEXING ANION EXCHANGERS
1SUE Tashkent Scientific Research Institute of Chemical Technology, Termez govment universiti; E-mail: hhturaev@rambler.ru
Abstract. Background. Use of complexing anion resins in various fields of science and technology requires knowledge of the basic kinetic and physicochemical properties, such as sorption capacity ferrous metal ions, and ion exchange rate of these properties depending on the pH and ionic strength aqueous solutions. Also, the study of the complexation of anion exchangers with metal ions sorbed presence sorption process is an urgent task of Inorganic and Analytical Chemistry.
Purpose. In order to study the study supplied kinetic properties anion synthesized based on thiourea, melamine and epichlorohydrin, in particular, the values of the rate of sorption and diffusion coefficient of copper and nickel ions.
Methodology. Sorption-kinetic properties of the resin synthesized complexing methods complexometric and potentiometric titration.
Originality. Synthesized new polyfunctional anion exchanger based on the reaction products of thiourea-based (T), epichlorohydrin (ECH) and melamine (M) having improved sorptive characteristics and form complexes with certain transition metal cations.
Findings. These data show that the degree of saturation TEM we synthesized anion is 2.4 mg-eq / g, i.e. resulting anion exchanger in its kinetic properties are not inferior to the famous Universal anion exchangers EDE-10P (1.8 mg-eq / g). Also we set the value of the copper diffusion coefficient after 7 hours of contact phases of the anion exchanger for TEM – 6.8 • 10-8, and for the anion exchanger EDE-10P – 5.6 • 10-8.
Keywords: anion exchanger, kinetics,, nickel, chelatometry, potentiometers, titration, diffusion coefficient.
Highlights:
* We studied the mechanism of ion exchange of copper nickel;
* For this purpose, used ion exchange rate depending on the time.
Citation: A. T. Djalilov, X. X. Turaev, Sh. A. Kasimov, F. B. Eshkurbonov. Study of kinetic properties of the complexing anion exchangers // Uzbek chemical journal, -2017. –Nr1. –P.21-26.
Received: 08.08.2016; Accepted: 28.10.2016; Published: 15.02.2016
References
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9. Dzhalilov A.T., Turaev H.H., YEshkurbonov F.B., Kasimov SH.SH. Izuchenie fiziko-himicheskih svoystv sintezirovannogo komplekso-obrazuyus`hego anionita// Uzb.him.zhurn. - 2013. -N1. - S.10-12.
10. YEshkurbonov F.B., Dzhalilov A.T. Izuchenie termicheskoy ustoychivosti sintezirovannogo kompleksoobrazuyus`hego ionita i kinetiki sorbcii nekotoryih metallov// Himiya i himicheskaya tehnologiya. Tashkent 2013 g. -N4. -S.56-58.
11. Dzhalilov A.T., YEshkurbonov F.B. Sintez i svoystva novyih kompleksoobrazuyus`hih ionitov. III mezhdunarodnaya konferenciya po himii i himicheskoy tehnologii, 16 -20 sentyabrya, Erevan - 2013. -S. 444-446.
12. YEshkurbonov F.B. Poluchenie ionitov na osnove reakcii vzaimodeystviya tiomochevinyi, yepihlorgidrina i razlichnyih aminov// Uzb.him.zhurn. - 2013. -N5. - S. 27-30.
13. YEshkurbonov F.B. Sorbciya ionov molibdena anionitom na osnove tiomochevinyi, yepihlorgidrina i melamina. // Uzb.him.zhurn., Toshkent -2014. -N1. -S.23-27.
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ANORGANIC CEMISTRY
UDK 548.312.6:541.49:546.48
Sh.Sh. Daminova, 1S.A.Talipov, Z.C. Kadirova, Kh.T. Sharipov
SYNTHESIS, PROPERTIES AND CRYSTAL STRUCTURE OF CADMIUM DIIZOPROPYLDITHIOPHOSPHATE WITH 2-AMINO-1-METHYLBENZIMIDAZOLE COMPLEX
Tashkent Chemical-Technological Institute
1Institute of Bioorganic Chemistry Academy of Sciences Republic Uzbekistan
Abstract. Background. The actual direction of coordination chemistry is development of methods of synthesis of d-transition metals’ chelate compounds with sulfur-containing organic ligands and mixed-ligand complexes leading to their practical application. The reliable information on the composition, structure and properties of new complex compounds should be the fundamental basis for establishment of properties changes’ laws typical for a number of synthesized compounds.
Purpose. The research is focused on synthesis, study of properties and structure of coordination compounds, formed Cd[(i-C3H7O)2PS2]2 with 2-amino-1-methylbenzimidazole (MAB) as well as determination of interaction nature of molecules in crystal structures.
Methodology. Synthesis of the cadmium diizopropyldithiophosphate and 2-amino-1-metylbenzimidazole mixed-ligand compound was carried out in ethanol solution by addition of heterocycle to chelate. Single crystals for X-ray analysis were grown up by slow evaporation at room temperature in saturated alcohol solution. The structure was studied by methods of X-ray phase, thermal and IR spectroscopic analyses, X-ray structural analysis.
Originality. The novel [Cd (MAB)2(iso-ProPS2)2] mixed ligand complexes were synthesized. The MAB molecules were allocated in coordination sphere of cadmium diisopropyldithiophosphate. The molecules’ interaction and packing in the crystal structure were discussed.
Findings. The complex has a distorted tetrahedral configuration around the metal ion, the coordination sphere consists of 2 sulfur atoms of monodentate coordinated diisopropyldithiophosphate ions and 2 nitrogen atoms of aminobenzimidazole molecules. The spectroscopic data were confirmed by X-ray diffraction data. The thermal behavior of the complex were studied and decomposition of intermediate products was identified.
Keywords: synthesis, mixed-ligand complex, crystal structure, cadmium
Highlights:
* New cadmium mixed-ligand complex of diisopropyldithiophosphate and MAB was synthesized
* The crystal structure and molecule packing of the complex сcompound was established
Citation: Sh.Sh. Daminova, S.A.Talipov, Z.C. Kadirova, Kh.T. Sharipov. Synthesis, properties and crystal structure of cadmium diizopropyldithiophosphate with 2-amino-1-methylbenzimidazole complex // Uzbek chemical journal, -2017. –Nr1. –P.27-36.
Received: 26.09.2016; Accepted: 30.10.2016; Published: 15.02.2016
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7. Zhu J., Wu C. F., Li X., Wu G. S., Xie S., Hu Q.N., Hong, X. Synthesis, biological evaluation and molecular modeling of substituted 2-aminobenzimidazoles as novel inhibitors of acetylcholinesterase and butyrylcholinesterase //Bioorganic & medicinal chemistry. –2013. –Т. 21.– No.14.–С. 4218-4224.
8. Shabana, A. A., Butler, I. S., Gilson, D. F., Jean-Claude, B. J., Mouhri, Z. S., Mostafa, M. M., & Mostafa, S. I. Synthesis, characterization, anticancer activity and DNA interaction studies of new 2-aminobenzothiazole complexes; crystal structure and DFT calculations of [Ag(Habt) 2] ClO4 //Inorganica Chimica Acta. – 2014. – Т. 423. – С. 242-255.
9. de Jongh L. A., Dobrzańska L., Strasser C. E., Raubenheimer H. G., Cronje S. Imine-coordinated 2-Aminoazole Complexes of Au (I): Complicating Reactions and Verification of Products by Crystal Structure Determination //ZeitschriftfürNaturforschung B. –2014. –Т.69.–No.9-10.–С.1073-1087.
10. Kessentini A., Belhouchet M., Suñol J. J., Abid Y., Mhiri T. Synthesis, crystal structure, vibrational spectra, optical properties and theoretical investigation of bis (2-aminobenzimidazolium) tetraiodocadmate //Journal of Molecular Structure. – 2013. – Т. 1039. – С. 207-213.
11. Sheldrick G. M. A short history of SHELX //Acta Crystallographica Section A: Foundations of Crystallography. – 2008. – Т. 64. – No.1. – С. 112-122.
12. Lawton S. L., Kokotailo G. T. Crystal and molecular structures of zinc and cadmium O, O-diisopropyl phosphorodithioates //Inorganic Chemistry. – 1969. – Т. 8. – No. 11. – С. 2410-2421.
13. Sharipov K. T., Daminova S. S., Talipova L. L. Crystal and Molecular Structure of Rhodium (III) Diisopropyldithiophosphate //Journal of Structural Chemistry. – 2002. – Т. 43. – No. 2. – С. 369-372.
14. Kadirova Z. C., Rahmonova, D. S., Talipov, S. A., Ashurov, J. M., & Parpiev, N. A. Bis (acetylacetonato-κ2O, O′)(2-amino-1-methyl-1H-benzimidazole-κN3) oxidovanadium (IV) //Acta Crystallographica Section E: Structure Reports Online. – 2009. – Т. 65. – No. 7. – С. m819-m819.
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UDK 628.34
F. I. Еrkabaev
STUDY THE EFFECT OF ALKALINE WASTEWATER ON DEGREE OF REDUCTION OF CHROMIUM(VI) IONS
Institute of General and Inorganic chemistry Academy of Sciences of Uzbekistan,
e-mail: erkabaevf@rambler.ru
Abstract.Background. Reagent method of removal of chromium ions from wastewater of galvanic and other enterprises is spread. Purification of waste solutions from chromium (VI) ions by their reduction to chromium (III) ions is carried out in an acidic medium by chemical reagents such as thiosulfates, pyrosulfites and sodium or potassium bisulfite. To isolate the chromium (III) ion in the form of sparingly soluble chromium (III) hydroxide, wastewater subsequently is basified by reagents: NaOH, KOH, Na2CO3, lime milk, etc. Of particular interest is the use of wastes as reagents for sewage purification
Purpose. The aim of this work is to study the recovery of chromium (VI) ions in the presence of alkaline wastewater of syntepon production, to investigate the degree of reduction of chromium (VI) to chromium (III) ions depending on the amounts of alkaline wastewater and the chemical reducing agent.
Methodology. The object of investigation chosen is the exhaust alkaline wastewater of syntepon production process and the model spent chrome plating solution from galvanizing plant. For determination of chromium ions’ concentration the titrimetric, photometric, physicochemical methods were used.
Originality. It is found out that by using as reducing agent of sodium thiosulfate in the presence of alkaline wastewater, residual chromium (VI) ions in the model solution at initial concentration 50 g/liter are reduced to finish concentration 4 mg/l. Under the same conditions the use of sodium hydrosulfite reduces the residual content of chromium (VI) only down to 120 mg / l.
Findings. Studies on recovery of hexavalent chromium in the presence of sewage enabled to establish the optimum ratio of the chromium-containing alkaline solution to the waste water, 2: 1, respectively, at which the lowest concentration of residual Cr (VI) in solution exists.
Keywords: chromium ions (VI), alkaline wastewater, chromium-containing water, chemical oxygen demand.
Highlights.
* The optimal ratio of the feed solution and the alkaline wastewater are determined.
* Reducing agent effecting on the maximum Cr(III) recovery value is detected.
Citation: F. I. Еrkabaev. Study the effect of alkaline wastewater on degree of reduction of chromium(VI) ions // Uzbek chemical journal, -2017. –Nr1. –P.36-41.
Received: 18.11.2016; Accepted: 28.11.2016; Published: 15.02.2016
References
1. Pod red. Dj.K.Kushni, Udalenie metallov iz stochnih vod. Neytralizaciya i osajdenie./ Perevod s angl.- M: Metallurgiya, 1987.-175 s.
2. Ishanhodjaev S., Erkabaev F.I., Hasanov B., Ishanhodjaev S.S Razrabotka tehnologii polucheniya oksida hroma iz otrabotannyih hromsoderjashih rastvorov galvanicheskih cehov. "Uzbekskiy himicheskiy jurnal" -2001.-No.3 -S.33-35.
3. Lure Y.Y. Himicheskiy analiz proizvodstvennih stochnih vod.-M.: Gosximizdat, 1958.-234 s.
4. Minligulova G.A., SHayhiev I.G., Issledovanie ochistki stochnih vod, soderjashih ioni tyajolih metallov OAO "KAMAZ", stokami neftehimicheskih proizvodstv // Vestnik Kazan. tehnol. un-ta. - 2011. - T. 14, -No. 6. - S. 166-171.
5. S.Hayhiev, I.G. Minlegulova G.A. Issledovanie ochistki kislih modelnih stokov, soderjashih ioni tyajelih metallov, stochnimi vodami neftehimicheskih proizvodstv // Vestnik Kazan. tehnol. un-ta. - 2011. - T. 14, No. 12. - S. 118-122.
6. I.G. Shayhiev, G.SH. Zaripov, G.A. Minligulova. Issledovanie ochistki hromsoderjashih galvanostokov OAO "KamAZ // Vestnik mashinostroeniya. - 2010. – No. 8. - S. 81-83.
7. Problemi razvitiya bezothodnih proizvodstv. B.N.Laskorin, B.V.Gromov, A.P.Cyigankov, V.N.Senin. -M.: Stroyizdat, 1978. -156 s.
8. K.B.Lebedeva. Ochistka i kontrol` stochnyih vod predpriyatiy svetnoy metallurgii.- M.: Metallurgiya, 1983.-386 s.
9. Y.Y.Lure. Spravochnik po analiticheskoy himii.- M.: Gosximizdat, 1962.-260 s.
10. Poluchenie pigmenta iz otrabotannyih hromovih elektrolitov. Ishanhodjaev S., Erkabaev F.I., Ishanhodjaev S.S, Hasanov B // ToshKTI fan haftaligi: Tez.dokl.- T., 4-7 aprel 2000 y.- T., 2000.- S. 9-10.
11. Razrabotka tehnologii polucheniya oksida hroma iz otrabotannih hromsoderjashih rastvorov galvanicheskih cehov. F.I.YErkabaev, S.Ishanhodzhaev, B.Hasanov, S.S.Ishanhodzhaev // Uzb.him.jur,- 2000.-No.3.-S. 47-49.
12. Razrabotka tehnologii obezvrezhivaniya otrabotannyih elektrolitov. // Otchet o NIR Zaporojskogo industrialnogo instituta,- Zaporoje. -1987.- S. 23-24.
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UDK 532.64 (088.8)
E.T.Safarov, V.P.Guro, M.A.Ibragimova
FLUIDIZED BED REACTOR FOR MOLYBDENITE CONCENTRATES ROASTING. PART 1.
Institute of general & inorganic chemistry of Uzbekistan Academy of sciences,
Tashkent city, Uzbekistan
Abstract. Background. For granulation molybdenite concentrate’s charge at JSC "Almalyk MMC" contains up to 10% kaolin, reducing the Mo content in the cinder. An alternative to kaolin new charge’s composition is developed based on polymers SK-K and SK-D devoid of this disadvantage. Another its advantage is the porosity of the pellet’s surface, which facilitates the diffusion rate of limiting steps of the processes of oxygen supply and removal of sulfur dioxide from the reaction zone.
However, during the test a negative feature is revealed concerning sintering granules and adhesion of cinders on the hearth of the furnace.
Purpose - the creation and testing of laboratory fluidized bed ("boiling" layer’s) reactor for the Mo concentrate roasting, preliminary granulated with binders: kaolin, polymers SK-K, SK-D, search for the causes of granules sintering.
Methodology. Granules of different composition’s charges were subjected to drying at: 20-110-300 °C and calcined in a rotary kiln and the fluidized bed reactor with volume of 150 cm3 with supercharged air or O2. Then the following types of tests were conducted: elemental analysis – via spectrometers Perkin-Elmer 3030V, Aligent 7500 ISP MS, thermal analysis – via derivatograph Paulik-Erdei; X-ray inspection – via DRON-UM device; IR spectral analysis – via spectrograph UR-20 (700-3600 cm-1).
Originality. A lab fluidized-bed reactor (FBR) was created and tested for burning of granulated Mo concentrate with mineral or organic binders in charge’s composition - on the basis of polymers SK-K and SK-D. Its advantage, in compare with different furnaces including current drum oven, is its 20-fold increase in performance of molybdenite oxidation process and increase in specific Mo and Re recoveries of the cinder. Furthermore, sintering of the pellets is excluded in FBR oven.
Findings. The pellets’ samples containing organic binders are obtained at the FBR-established laboratory furnace, as well as at conventional muffle furnace. Comparative studies by elemental analysis, IR-spectroscopy, derivatography, elemental analyses are performed. At temperatures above 300 ° C the polymer’s granules are being destructed acquire porosity. Advantages of FBR furnaces over other types of furnaces are revealed.
Keywords: candle, molybdenum concentrates, binder, kaolin, organic polymer
Highlights
* A laboratory fluidized bed reactor is created for Mo concentrate firing;
* In the fluidized bed oven a calcine of granulated Mo concentrate is obtained;
* As part of the Mo-concentrate charge the SK-K, SC-D polymers attend at;
* The cause of granules sintering containing an organic binder is revealed.
Citation: E.T.Safarov, V.P.Guro, M.A.Ibragimova. Fluidized bed reactor for molybdenite concentrates roasting. Part 1. // Uzbek chemical journal, -2017. –Nr1. –P.42-48.
Received: 22.11.2016; Accepted: 07.12.2016; Published: 15.02.2016
References
1. TSh 64-23283880-07:2013. Ogarok promyishlennogo produkta molibdenovogo. - Tashkent : Uzstandart, 2013.
2. V. P. Guro, F. M. Yusupov, M. A. Ibragimova. Pelleting of Molybdenite Concentrate with Organic-Mineral Binder // AASCIT Communications. 2015. Vol. 2, No. 5. - P. 200-204.
3 Safarov E.T., Guro V.P., Ibragimova M.A. Polimernyiy komponent shihtyi granuli-rovaniya molibdenitovogo koncentrata // Uzbekskiy himicheskiy zhurnal. - 2016. – No. 2. -S.25-30.
4. V. P. Guro, F. M. Yusupov, M. A. Ibragimova, F. G. Rakhmatkarieva. The Choice of Optimal Binder For Molybdenite Concentrate Granulation // Tsvetnye Metally (Non-ferrous metals). 2016. No. 2. pp. 68-73; DOI: http://dx.doi.org/10.17580/tsm.2016.02.11
5. Safarov E.T., Guro V.P., Ibragimova M.A. Modifikaciya polimernogo svyazuyus`hego - komponenta shihtyi granulirovaniya molibdenitovogo koncentrata // Uzbekskiy himiche-skiy zhurnal. - 2016.-No. 5.- S.48-53.
6. Vitaliy Guro, Edgor Safarov, Matluba Ibragimova, Zuhra Kadirova. The Choice of Colloid Binder for Pelleting of Molybdenite Concentrate // Colloid and Surface Science. Vol. 1, No. 1, 2016, pp. 6-9. doi: 10.11648/j.css.20160101.12
7. Paulik.F; Paulik .J., Der Derivatograph. I. Mitteilung Ein automatisch registrierender Apparat zur gleichzeitigen Auspuchrund dee Defferential-ther-mogravimetischen Untersuchungen// z. Anal.Chem.-1958.-v. 160.-No. 4-P.241-250
8. Zelikman A.N. Metallurgiya tugoplavkih redkih metallov. M.: Metallurgiya, 1986. 440 s.
9. Zelikman A.N. Molibden. M.: Metallurgiya, 1970. 440 s.
10. 13. 1x B.J. Ennis, J.D. Litster, Particle size enlargement, in: R. Perry, D. Green ?Eds., Perry's Chemical Engineers' Handbook, 7th edn., McGraw-Hill, New York, 1997, pp. 20-56-20-89.
11. Patent RU 2353678. Sposob okomkovaniya sul`fidnyih molibdenitovyih koncen-tratov. Palant A.A. (RU), Gorbachev M.I. (RU), Morozov I.V.(RU), Moskalenko S.A.(RU). MPK C22B1/244 (2006.01). Opubl.: 27.04.2009. Zayavka: 2007125956/02, ot 10.07.2007. Data nach. otsch. sroka deys. patenta: 10.07.2007
12. Babaev K.G. Alkaceva V.M. Proektirovanie v usloviyah g. Vladikavkaza otdeleniya obzhiga granulirovannogo molibdenitovogo koncentrata proizvoditel`nost`yu 6800 t/god. - g.Vladikavkaz.-2015 g. - 80 s. Opubl. http://www.allbest.ru/
13. Karimova L.M., Kayralapov E.T., ZHumashev K.ZH., Tokbulatov T.E. Matematicheskoe opisanie rezul`tatov izucheniya sushki granulirovannogo chernovogo medno-molibdenovogo koncentrata mestorozhdeniya "TASTAU" // Izvestiya Tomskogo politehnicheskogo universi-teta. 2013. T. 322. No.1.- S.106-110.
14. Kazicina L.A., Kupletskaya .B. v kn.: "Primenenie UF-, IK-, YAMR- i mass-spektroskopii v organicheskoy himii". - M.: Izd-vo MGU. S. 215, 229, 230
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UDK 661.632.232:631.8
U.К.Аlimov, Sh.S. Namazov, А.М.Reymov
RHEOLOGICAL PROPERTIES OF CALCIUM-PHOSPHATE AND MONOBASIC CALCIUM PHOSPHATE SLURRIES BEING BYPRODUCTS OF DOUBLE SUPERPHOSPHATE.
Institute of General and Inorganic Chemistry, Uzbek Academy of sciences
Abstract. Background. Cyclic technology of processing natural phosphate in double superphosphate provides overall decomposition of secondary raw for a short time. This way for double superphosphate production is more efficient than conventional one, such as chamber, chamber-line, line and multiple-return. There has been conducted the study of rheological properties (in a range 30-100°С) of calcium-phosphate and monobasic calcium phosphate (MCP), being the by-products of phosphorite concentrate decomposition under high norms and concentrations of wet process phosphoric acid (WPA). It has been shown that rheological behaviors of the slurries in studied range are sufficient during the pumping in existing devices.
Purpose. The object of the research is to study density and viscosity of calcium-phosphate and acidic MCP slurries in a wide range of temperature: 30-100 °С.
Methodology. Liquid’s density was defined picnometrically, their viscosity – with capillary viscometer in measuring volumetric speed of slurry flow through VPJ-2 device supplied with capillary diameter 1.47 and 2.37 mm put in thermostat filled with glycerin.
Originality. For the first time there have been studied the rheological properties of by-products of phosphorite concentrate decomposition under high norms and concentrations of WPA from phosphorite of Central Kyzylkum.
Findings. There have been found the value of the rheological properties (density and viscosity) of calcium phosphate and MCP slurries at 30-100 °С. The chemical composition and crystallization temperature of two types of the slurries have been determined. It has been established that calcium phosphate and MCP slurries in the studied ranges of concentration and norms of WPA starting from 60 and 70°С respectively, are fluid.
Keywords. Washed and calcinated concentrate, WPA, calcium-phosphate and monobasic calcium phosphate slurry, density, viscosity.
Highlights.
* It has been shown the manufacturability of MCP slurry in the wide temperature ranges.
* The dependence of rheological properties value on the temperature has been established.
Citation: U.К.Аlimov, Sh.S. Namazov, А.М.Reymov. Rheological properties of calcium-phosphate and monobasic calcium phosphate slurries being byproducts of double superphosphate. // Uzbek chemical journal, -2017. –Nr1. –P.48-58.
Received: 28.11.2016; Accepted: 14.12.2016; Published: 15.02.2016
References
- Dvoynoy superfosfat. Теhnologiya i primenenie/ М.А.Shapkin, Т.I.Zavertyaeva, R.Yu.Zinyuk, B.D.Guller. Leningrad. Himiya, 1987. 216 s.
- А.s.343969 SSSR. М.Kl С05 b 1/04. Sposob polucheniya dvoynogo superfosfata/М.Е.Pozin, B.А.Kopilev, А.V.Firskina, Van Li-shen. B.I. 1972, No.21.
- Zinyuk R.Yu., Fomicheva Т.I., Shapkin М.А., Pozin М.Е. Issledovanie v oblasti tsirkulyatsionnogo sposoba proizvodstva dvoynogo superfosfata// Jurnal prikladnoy himii. 1979.T.52. No.7.S.1445-1450.
- А.s.652157 SSSR. М.Kl С05 v 1/04. Sposob polucheniya dvoynogo superfosfata/М.Е.Pozin, V.L.Varshavskiy, R.Yu.Zinyuk, B.D.Guller, М.Е.Sokolova and М.V.Jdanova. B.I. 1979, No.10.
- А.s.793960 SSSR. М.Кl С05 В 1/04. Sposob polucheniya dvoynogo superfosfata/М.Е.Pozin, R.Yu.Zinyuk, B.D.Guller, М.А.Shapkin, Т.I.Fomicheva i М.V.Jdanova. B.I. 1981, No.1.
- Ignatova H.V., Sokolovskiy А.А. Poluchenie monokaltsiyfosfata razlojeniem apatitovogo kontsentrata termicheskoy fosfornoy kislotoy tsiklicheskim sposobom//Issledovaniya po himii i tehnologii udobreniy, pestitsidov, soley. Мoskva. Nauka, 1966. s. 170-176.
- Myrzakhmetova B.B, Besterekov U., Petropavlovsky I.A. Poluchenie dvoynogo superfosfata iz fosforitov Kokdjon i Koksu jidkofaznym metodom//Obedinenny nauchny jurnal. 2012, No. 2. S 60-64.
- Myrzakhmetova B., Besterekov U., Petropavlovsky I., Ahnazarova S., Kiselev V., Romanova S. Optimization of decomposition process of Karatau phosphorites/Eurasian chemico-technological journal. 2012, vol. 14, No 2, PP. 183-190.
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- Umarbek K.Alimov, Shafoat S. Namazov, Akhmed R. Reymov. Specifies of the recirculating method for Central Kyzyl Kum phosphorites processing to qualified phosphoric fertilizers. Journal of Chemical Technology and Metallurgy. V.50. 2015. PP. 163-170.
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- Purification Phosphoric Acid. Technical Information Bulletin. 2012. pp.29.
- Metody analiza fosfatnogo syrya, fosfornyh i kompleksnyh udobreniy, kormovyh fosfatov / М.М.Vinnik L.N.Erbanova, P.М. Zaytsev i dr. – М.: Himiya, 1975, 218 s.
- Rukovodstvo k prakticheskim zanyatiyam po tehnologii neorganicheskih vashestv/М.Е. Pozin, B.А. Kopilev, G.V. Belchenko.-Leningrad, Himiya, 1980. 368 s.
- Метоdicheskie instruktsii vipolnenii ispytanoy ekstraktsionnoy pulply i ekstraktsionnoy fosfornoy kisloty // OA «Аmmofos-Макsam», g.Аlmalyk, –2010. 22 s.
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UDC 631.85:661
1D.G.Pak, A.A.Mamataliyev, Sh.S.Namazov, A.R.Seytnazarov, B.M.Beglov
NITROGEN, PHOSPHORUS, POTASSIUM CONTAING FERTILIZERS ON THE BASIS OF AMMONIUM NITRATE, PHOSPHORITE FLOUR OF CENTRAL KYZYLKUM, LOCAL POTASSIUM CHLORIDE AND THEIR PHYSICOCHEMICAL, COMMODITY PROPERTIES
Institute of General and Inorganic Chemistry of AS of the RUz, 1JSC «Farg `onaazot»
Abstract. Background. Large branch of chemical industry producing mineral fertilizers is created in Uzbekistan. Our factories produce unary nitrogen fertilizers such as ammonium nitrate, carbamide, ammonium sulphate, unary phosphoric fertilizers such as simple ammonium superphosphate, unary potash fertilizer such as potassium chloride and binary nitrogenphophorous fertilizers such as ammophos, suprephos and ammonium sulfatephosphate. But great demand at a world market attract triple NРК-fertilizers as they deeply reduce expenses for their storage, transportation and use. Available resources of Uzbekistan allow us creating the production of triple NРК-fertilizers.
Purpose. To study process of obtaining NРК-fertilizers on the basis of ammonium nitrate melt, ordinary phosphorite flour of Central Kyzylkum, potassium chloride and their physicochemical, commodity properties.
Methodology. An addition of phosphorite flour and potassium chloride into a melt of ammonium nitrate, granulation of a mixture by billing method, research of compounds and properties of obtained fertilizers were carried out by traditional methods.
Originality. For the first time a process of obtaining triple NРК-fertilizers by addition of phosphorite flour and potassium chloride to a melt of ammonium nitrate is studied and their physicochemical and commodity properties are defined.
Findings. Composition and properties of triple NРК-fertilizers, obtained at the different weight ratio of ammonium nitrate melt : phosphorite flour:КCl = 100 : (20-30) : (5.75-57.5) are defined. So, at the ratio 100 : 20 : 57.5 the fertilizers were obtained containing 19.40 % N, 1.98 % Р2О5, 19.42 % К2О, which strength of granules is equal to 9.07 МPа and time of dissolution of granules in water is found to be 128.9 seconds. While strength of pure ammonium nitrate granules equal 1.6 МPа and time of its dissolution 46.8 seconds. Hygroscopic point of obtained fertilizers is less than hygroscopic point of ammonium nitrate. Therefore to carry on a process it is necessary to pack them in polyethylene sacks. It has been revealed that ammonium nitrate of 3.5 % humidity strongly cakes and loses friability, and samples of NPK-fertilizers preserve external form and friability even at 5% humidity. Only at humidity of 6 % they lose their sieving ability.
Key words. melt, phosphorite flour, potassium chloride, NPK-fertilizers, compound, property, strength, kinetic, granule.
Highlights.
* Composition and properties of triple NРК-fertilizers are defined.
* Hygroscopic point of obtained fertilizers is below hygroscopic point of ammonium nitrate.
Citation: D.G.Pak, A.A.Mamataliyev, Sh.S.Namazov, A.R.Seytnazarov, B.M.Beglov. Nitrogen, phosphorus, potassium containg fertilizers on the basis of ammonium nitrate, phosphorite flour of Central Kyzylkum, local potassium chloride and their physicochemical, commodity properties. // Uzbek chemical journal, -2017. –Nr1. –P. 59-66.
Received: 05.12.2016; Accepted: 14.12.2016; Published: 15.02.2016
References
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9. Pak D.G., Namazov SH.S., Seytnazarov A.R., Mamataliev A.A., Zakirov B.S., Beglov B.M., Usmanov S. Razrabotka i osvoenie tehnologii polucheniya azotnofosfornokaliynyih kompleksnyih udobreniy. // Himicheskiy zhurnal Kazahstana (Almatyi). - 2016. – No. 4. - S. 219-232.
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11. Metodyi analiza fosfatnogo syir`ya, fosfornyih i kompleksnyih udobreniy, kormovyih fosfatov / M.M.Vinnik, L.N.Erbanova, P.M.Zaycev i dr. - M.: Himiya, 1975, 213 s.
12. Pestov N.E. Fiziko-himicheskie svoystva zernistyih i poroshkoobraznyih himicheskih produktov. - M.: Izd-vo AN SSSR, 1947g, 239 s.
13. Pozin M.E., Zinyuk R.YU. Fiziko-himicheskie osnovyi neorganicheskoy tehnologii: Ucheb. Posobie dlya vuzov.- L.: Himiya, 1985. - 384 s.
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ORGANIC CEMISTRY
UDK 665.335.1
Sh.Sh.Hakimov, Y.S.Savriyev, K.H.Majidov
RESEARCH OF FEATURES OF STRUCTURE OF SOME OLIVE SEEDS OF LOCAL GRADES
Bukhara engineering technological institute of the Republic of Uzbekistan
Abstract. Background. For manufacture of vegetable oils the ineffective technology, processes and the equipment are characteristic. Technological processes differ by multistage and power consumption. For the decision of the problem connected with maintenance of a necessary consumption level of vegetable oils of high quality domestic production it is necessary to improve the technology of their production.
Objective. Development of advanced technologies by means of studying of laws of formation of capillary-porous system of oily materials, in particular, olive cultures of local grades.
Methodology. Cellular and intracellular structure of kernel and cover of olive seeds and their change under the influence of technological parameters were analyzed by methods of poromethry, light and scanning electronic microscopy. Chemical, physical-chemical and kinetic methods of researches were carried out by standard methods of the analysis. Estimation of results and their statistical reliability were fulfilled by means of application of modern methods of calculation of statistical reliability of results’ data.
Originality. The interrelation between a structure of seeds and lipids and albumens’ maintenance there was revealed, their role in formation of structure of materials in technological processing was estimated. Sharp distinctions in cell’s size and their ultrastructure in surface blankets of storing fabric, basically parenchyma, as well as in sizes and localization of lipid spheros and albuminous globules was revealed.
Findings. By analyze of character of cellular structure, sizes of cages, thickness of cellular walls, quantity and size of lipid spheros and albuminous bodies, development of cytoplasma matrix, the distinctions of seeds in the maintenance of lipids and albumens, sizes of pores and capillaries was defined. The obtained data has shown that olive seeds differ among themselves with their basic physical and physical-chemical characters.
Ключевые слова: oilseeds, cotton, safflower, rapeseed, soybean, sunflower, porous structure, technological factor.
Highlights:
- Cell’s pores of 1000 Å in their radius are boundary,
- They are divided into micropores, mesopores (r <10-5 cm) and makro- capillaries (r> 10-5 cm).
Citation: Sh.Sh.Hakimov, Y.S.Savriyev, K.H.Majidov. Research of features of structure of some olive seeds of local grades // Uzbek chemical journal, -2017. –Nr1. –P. 67-72.
Received: 15.03.2016; Accepted: 26.09.2016; Published: 15.02.2016
References.
1. Kopeykovskiy V.M., Danil`chuk S.I., Garbuzova G.I. i dr. Tehnologiya proizvodstva rastitel`nyih masel. -M.: Legkaya i pis`hevaya promyishlennost`, 1982.-252 s.
2. S`Herbakov V.G., Ivanickiy S.E. Proizvodstvo belkovyih produktov iz maslichnyih semyan.-M.:Agropromizdat.1987.-152 s.
3. Tyutyunnikov B.N. Himiya zhirov. -M.: Pis`hevaya promyishlennost`.1974. 448 s.
4. Fiziologiya i biohimiya pokoya i prorastaniya semyan // Per. s angl. -M.: Kolos, 1982. - 495 s.
5. ZHiznesposobnost` semyan // Per. s angl. -M.: Kolos, 1978. 415 s.
6. Bohinski R. Sovremennyie vozzreniya v biohimii // Per. s angl. -M.: Mir, 1987. -544 s.
7. Belki semyan zernovyih i maslichnyih kul`tur. // Per. s angl. Kolos, 1977. 312 s.
8. Arutyunyan N.S., Kornena E.P., YAnova L.I i dr. Tehnologiya pererabotki zhirov.-M.:Pis`hepromizdat,1999.-452 s.
9. Komilov M.Z. Sovershenstvovanie sposoba rafinacii masla s predvaritel`noy obrabotkoy hlopkovoy myatki / M.Z.Komilov: Avtoref. dis. kand. tehn. nauk. - Tashkent, 2008.
10. S`Herbakov V.G. Biohimiya i tovarovedenie maslichnogo syir`ya.-M.:Agropromizdat.1991.-356 s.
11. Byikova S.F. Teoreticheskie i yeksperimental`nyie osnovyi sozdaniya principial`no novoy resursosberegayus`hey tehnologii polucheniya rastitel`nyih masel / S.F.Byikova: Avtoref. dis. dok-ra tehn. nauk. Sankt-Peterburg, 1996.
12. Rukovodstvo po metodam issledovaniya, tehnohimicheskomu kontrolyu i uchetu proizvodstva v maslozhirovoy promyishlennosti. -L.: VNIIZH, 1967. t.1, kn.1 i 2. -1042 s.; 1965. t.2. -419 s
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UDK 664.64.016.8:664.644
G.Z.Djahangirova, P.M.Tursunhodjaev, N.K.Aykhodjhaeva, D.A.Gafurova1
USE OF VEGETATIVE ADDITIVES IN THE BREADMAKING FROM FLOUR WITH THE DOWNGRADED BAKING PROPERTIES
Tashkent chemical-technological institute, 1 «Donmahsulotlari» Ltd, e-mail: djaxangirova77@mail.ru
Abstract. Background. In the conditions of market economy and high concurrence, the baking production corresponding to the increased demands of consumers is one of the priorities. Now the branch factories more often face a flour quality problem which can be solved by adding conditioners mainly of non- alimentary nature taken abroad that is reflected on food safety and cost price of their end products.
Purpose. The aim of research is to substantiate the feasibility of using natural supplements from the local plant raw material in the processing of wheat flour with reduced baking properties.
Methodology. Quality analyses of flour, dough and bread have been conducted in triple frequency by means of the standardized methods.
Originality. The effect of the powders obtained from carrots, pumpkins and red pepper introduced with replacement of 5% flour, calculated on the basis of its formulation on the output and properties of gluten, fermentative activity of microflora in the dough and bread quality.
Findings. In the experimental dough samples with additives it is revealed a natural reduction in the yield of wet gluten by an average of 6,0-9,2% (rel.), While reducing its extensibility by 3-4 cm and increasing the gas-retaining ability to 8,7-17,4 % relative to the values of similar indicators in the control test specimens. The products with the additives did reveal an increase in the volumetric output of bread 12,8-14,9%, improving the ability of hearth bread to hold their form 1.2-1.4 times more relative to the control samples without additives. We prove that the supplements allow you to adjust the baking properties of wheat flour with a "weak" on the strength of the gluten and provide the required quality of finished products. The choice of additives is caused by the presence of carotenoids that are resistant to heat treatment and capable of masking the color of crumb, giving it a yellowish tinge.
Keywords: powder; flour; baking; gluten; properties; dough; quality; bread.
Highlights:
* The effect of carrot, pumpkin and red pepper powders on the bread quality is established.
* It is showed a reduction of wet gluten by an average of 6,0-9,2% (rel.).
* The increase of the gas-retaining ability of the dough on 8,7-17,4%. Is revealed
Citation: G.Z.Djahangirova, P.M.Tursunhodjaev, N.K.Aykhodjhaeva, D.A.Gafurova. Use of vegetative additives in the breadmaking from flour with the downgraded baking properties// Uzbek chemical journal, -2017. –Nr1. –P.72-78.
Received: 28.10.2016; Accepted: 28.11.2016; Published: 15.02.2016
References
1. Auyerman L.YA. Tehnologiya hlebopekarnogo proizvodstva / Pod obs`h. red. L.I. Puchkovoy. - SPb.: Professiya. - 2005. - 416 s.
2. Kosovan A.P., Dremucheva G.F. Hlebopekarnyie uluchshiteli: tendencii razvitiya i osobennosti primeneniya // Hlebopechenie Rossii. - 2003.- No. 4.- S. 20-23.
3. Kosovan A.P., Dremucheva G.F. Primenenie hlebopekarnyih uluchshiteley dlya regulirovaniya kachestva muki // Pis`hevaya promyishlennost`. -2003.- No. 12.- S. 44-45.
4. CHizhikova O.G., Korshenko L.O. YEffektivnoe sredstvo povyisheniya kachestva hleba - hlebopekarnyie uluchshiteli // Vestnik Dal`nevostochnoy gosudarstvennoy akademii yekonomiki i upravleniya.- 1998.- No. 1(5).- S. 91-97.
5. Korshenko L.O. Stabilizaciya kachestva hleba iz pshenichnoy muki s nizkimi hlebopekarnyimi svoystvami//Internet-zhurnal "NAUKOVEDENIE".- 2014.- ¹ 6.- http://naukovedenie.ru /PDF/ 115TVN614.pdf (dostup svobodnyiy). Zagl. s yekrana. YAz. rus., angl. DOI: 10.15862/115TVN614.
6. Karnaushenko L. Povyishenie kachestva pshenichnogo hleba iz slaboy muki/L. Karnaushenko, G. Pshenishnyuk, T. Lebedenko//Hleboproduktyi.-2001.-No.6.- S.26-27.
7. Matveeva I.V. Koncepciya i tehnologicheskie resheniya primeneniya hlebopekarnyih uluchshiteley // Pis`hevaya promyishlennost`. -2005.- No. 5.- S.20-23.
8. Matveeva T.V., Koryachkina S.YA. Fiziologicheski funkcional`nyie pis`hevyie ingredientyi dlya hlebobulochnyih i konditerskih izdeliy: monografiya. - Orel: FGBOU VPO "Gosuniversitet- UNPK". - 2012. - 947s.
9. Pigmentyi pis`hevyih produktov i ih izmeneniya pri kulinarnoy obrabotke [YElektronnyiy resurs]. - URL:http://allrefs.net/c59/4ba0w/p81.
10. Teplovaya kulinarnaya obrabotka ovos`hey [YElektronnyiy resurs]. - URL : http://biofile.ru/bio/20795.html.
11. Puchkova L.I. Laboratornyiy praktikum po tehnologii hlebopekarnogo proizvodstva. 4-e izd. - SPb.: Giord. - 2004. - 264 s.
12. Koryachkina S.YA., Labutina, N.A. Berezina, E.V. Hmeleva. Kontrol` kachestva syir`ya, polufabrikatov i hlebobulochnyih izdeliy: uchebnoe posobie dlya vuzov - M.: DeLi plyus.- 2012.- 496c.
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UDK 664.335.1
B.N.Amanov, K.H.Majidov
FUNCTIONAL PROPERTIES OF ALBUMINS FROM WHEATEN BRAN
Bukhara engineering-technological institute, Ministry of higher and secondary specialized education of Republic of Uzbekistan, Bukhara
Abstract. Background. For creation of the wide spectrum of food products with adjustable structure and nutritious properties for production of albumin products it is expedient to use real-life raw materials of the country – the wheaten bran.
Purpose – Estimation of quality of albumin products with high biological value and multifunctional purpose, received from wheaten bran.
Methodology. Optimum technological modes of proteins recovery and rational kind of grain raw materials have been defined. The best of them was found to be bran of general production line from various systems of technological process and providing the yield of albumen 47-49 %, as well as grain-size fraction of the general bran mass with particles size 196-670 microns, providing the yield of albumen 60 % from its general maintenance in raw materials.
Originality. Albumin products from bran are characterized with true comprehensibility concerning the casein, equal to 94 %, average size of biological value on “growth signs” equal to 55.5 %. They contain more irreplaceable amino acids than initial raw materials, and albumin flour from grain-size fractions – the bran product enriched more, in compare with flour obtained from general bran, with scarce lysine, threonine, valine and leucine.
Findings. Albumin flour from bran comes closer to soya non-defatted flour with water-bound ability and surpasses all other albumin products (in 1.3-5.3 times). Albumin products from bran possess high oil-bound ability to form “oil in water” type emulsion. Albumin products from bran along with ability to change the superficial tension on border of section of “oil-water” phases also possess similar property concerning “gas-water” phases.
Keywords: albumin products, casein, lysine, threonine, valine, leucine, bran of general production line.
Highlights.
* Protein products from wheat bran possess a biological value;
* An additive of a protein flour improves the quality of food raw materials.
Citation: B.N.Amanov, K.H.Majidov. Functional properties of albumins from wheaten bran // Uzbek chemical journal, -2017. –Nr1. –P.78-83.
Received: 20.10.2016; Accepted: 21.11.2016; Published: 15.02.2016
References
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- Nеchаеv А.P., Kоlpаkоvа V.V. Rеsursоsbеrеgаyushаya tehnоlоgiya pеrеrаbоtki оtrubеy pshеnisi // Pishеvаya prоmishlеnnоst. 1993. No. 12.
- Kоlpаkоvа V V., Nеchаеv А P. i dr. Bеlоk pshеnichnih оtrubеy. Vliyaniе tehnоlоgichеskih fаktоrоv nа vihоd i biоlоgichеskuyu sеnnоst II Hrаnеniе i pеrеrаbоtkа sеlhоzsirya 1994 No. 6.
- Kоlpаkоvа V.V., Nеchаеv А.P., Smirnоvа А.V. Bеlоk iz pshеnichnih оtrubеy. II. Himichеskiy sоstаv sirya i vihоd bеlkа // Hrаnеniе i pеrеrаbоtkа sеlhоzsirya. 1995. No. 4.
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- Kоlpаkоvа V.V. Nеchаеv А.P. Emulgiruyushiе i pеnооbrаzuyushiе svоystvа bеlkоvоy muki iz pshеnichnih оtrubеy // Izvеstiya vuzоv. Pish. tehnоlоgiya, 1995. No 1-2.
- Аmаnоv B.N. Funksiоnаlnое pitаniе kаk оsnоvnоy fаktоr gаrmоnichnоgо rаzvitiya lichnоsti. XXI аsr – intеllеktuаl-innоvаsiоn gоyalаr аsri rеspublikа ilmiy-аmаliy sеminаr mаtеriаllаri. Tоshkеnt – 2013., S. 64-69.
- Аmаnоv B.N. Mеtоdоlоgichеskiy pоdhоd k prоеktirоvаniyu rеsеptur hlеbоbulоchnih izdеliy s ispоlzоvаniеm kоmpоzitnih smеsеy. O’zbеkistоn Rеspublikаsi fаnlаr аkаdеmiyasi. Yosh оlimlаr аxbоrоtnоmаsi ilmiy jurnаl 2013. No.1-2. S. 39-44.
- Аmаnоv B.N., Isаbаеv I.B., Аtаmurаtоvа T.I. Ispоlzоvаniе kоmpоzitnih pоrоshkооbrаznih pоlufаbrikаtоv dlya fоrtifikаsii nutritivnih svоystv hlеbоbulоchnih izdеliy. IX – Mеjdunаrоdnаya nаuchnаya kоnfеrеnsiya studеntоv i аspirаntоv «Tehnikа i tehnоlоgiya pishеvih prоizvоdstv» Tеzisi dоklаdоv. Chаst 1, Mоgilеv 2014., S.112.
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UDK541.13., 661,185
M. Mirzaakhmedova, S. Khamraev, A. Alimov, F. Yusupov, G. Baymatova
DEHYDRATION AND DESALINATION OF WATER EMULSIONS WITH EMULSION REAKERS
Institute of General and Inorganic Chemistry, Uzbek Academy of Sciences mmirzaahmedova@bk.ru
Abstract. Background. Adding a water-oil emulsion demulsifier ("KD") based on glycerin, GMTA and oleic acid, we can increase an effectiveness of dehydration and desalting process. "KD" is a karboksildeemulgator obtained by condensation reaction of a carboxylic acid with glycerol and GMTA decay products.
Purpose. The aim of the research is to study demulsifiers created for dehydration and desalting of aqua-oil emulsions. Use of semi-local products solves a problem of import substitution by local oil emulsion breaker at crude oil dehydration and desalting by destroying the stable water-oil emulsions in their composition.
Methodology. Development of emulsion breakers and oil dehydrating reagents’ syntheses methods contributes to the local issues solutions such as import substitution, development of domestic technology of emulsion breakers and reducing their cost, pilot trials tests and industrial technology creature. The proposed new demulsifier’s synthesis methods of dewatering and desalination of oil dispersions were applied on oils samples at Garmiston, Feruza, Sherkent fields. The processes of demulsification, dehydration and desalting proceed in a variety of conditions and are being implemented in different ways. The low water oil samples present as dispersed emulsions, held aging step, and it is almost impossible completely to desalt them by existing methods.
Originality. The novelty of the proposed development consists in new methods of syntheses of a number of demulsifiers for dehydration and desalination of highly saline aqueous dispersions of oil on concrete examples of samples from various oil deposits (Garmiston, Feruza, Sherkent et al.). For the first time the creation of syntheses methods for emulsion breakers and oil dehydrating reagents creature promote a number of local issues solutions such as import substitution, development of domestic technology of emulsion breakers and reducing their cost, pilot tests and industrial technology developments.
Findings. Demulsifier’s tests results are offered and discussed. According to their effectiveness, the demulsifiers CD and DGMP do not inferior to imported reagent Dissolvan-4411.
Keywords: dehydration, desalting, demulsification, emulsions.
Highlights.
* For the first time demulsifiers basing on glycerin, GMTA, oleic acid are obtained
* They are designed for oil dehydration and desalting.
Citation: M. Mirzaakhmedova, S. Khamraev, A. Alimov, F. Yusupov, G. Baymatova. Dehydration and desalination of water emulsions with emulsion reakers // Uzbek chemical journal, -2017. –Nr1. –P.84-88.
Received: 15.03.2016; Accepted: 24.10.2016; Published: 15.02.2016
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