Volume Nr 1
INORGANIC CHEMISTRI
UDK 666.942
G.Zh.Orazimbetova, M.I.Iskandarova
SYNTHESIS AND INVESTIGATION OF CLINKERS WITH A HIGH SILICON-BASED MODULE ON THE BASIS OF RAW MATERIALS OF NEW DEPOSITS OF KARAKALPAKSTAN
Institute of General and Inorganic Chemistry of Uzbekistan Academy of Sciences
Abstract. Background. As a result of a large volume of geological exploration and drilling in the territory of Karakalpakstan, a huge amount of factual material has been obtained, which makes it possible to decipher the geological structure and regularities of the distribution of minerals. This work is devoted to solving the problems of scientific substantiation of their effective use in the national economy, in particular, through the production of cement.
Purpose: The purpose of the study is to determine the optimum composition of raw mixtures based on raw materials of Karakalpakstan and the chemical and technological parameters of clinker synthesis from four-component mineral systems "limestone + barkhan sand + clay + titanium-magnetite iron ore", "limestone + barkhan sand + clay + sedimentary iron-bearing manifestation "and the production of high-quality Portland cement, meeting the requirements of GOST 10178-85" Portland cement and slag Portland cement. Technical conditions ».
Methodology: Methods of chemical analysis of raw materials in accordance with GOST 5382 were used in the research. Calculation of raw mixtures for clinker burning was carried out according to a special program in accordance with the "Departmental Standards for the Technological Design of Cement Plants" with KN values ranging from 0.89 to 0.92. The content of CaOsv in clinkers was determined by the ethyl glycerate method. The microstructure of the clinkers was identified by electron microscopic analysis using a scanning electron microscope SEM-EVO MA 10.
Originality. The work for the first time established the possibility of obtaining conditioning portland cement clinkers from four-component raw mixtures, including "limestone + barkhan sand + clay + titanomagnetite iron ore" and "limestone + barkhan sand + clay + sedimentary iron-containing manifestation". The intensive assimilation of CaO and the passage of clinker formation reactions during firing of new raw mixtures with the total formation of all clinker minerals are shown. Synthesized clinkers that meet the requirements of regulatory documents for clinkers for general and sulfate-resistant cements.
Findings. As a result of experimental studies, a technology for obtaining high-silica clinkers from four-component raw mixtures containing "limestone + barkhan sand + clay + titanomagnetite iron ore" and "limestone + barkhan sand + clay + sedimentary iron-containing development" has been developed.
Key words: limestone, barkhan sand, clay, titanomagnetite iron-containing ore, sedimentary iron-bearing manifestation, firing, clinker, mineral formation, structure, cement, strength.
Highlights:
* Synthesis of clinkers from four-component raw mixes.
* Optimization of chemical composition of clinkers.
* Selection of optimal material composition of new raw mixtures.
* Investigation of the microstructure of Karakalpak’s clinkers.
To cite this article: G.Zh.Orazimbetova, M.I.Iskandarova. Synthesis and investigation of clinkers with a high silicon-based module on the basis of raw materials of new deposits of Karakalpakstan // Uzbek chemical journal.- 2018. – Nr1. – Pp.3-9.
Received: 11.12.2017; Accepted: 22.02.2018; Published: 27.02.2018.
References
1. Aimbetov N.K. K voprosu o transportnoy infrastrukture v osvoenii poleznyih iskopaemyih Karakalpakstana. //KKOANRUz. -Nukus. -zh.Vestnik. -2013. -Nr.2. -s.48-52.
2. Aimbetov N.K. O vozmozhnosti kompleksnogo osvoeniya Tebinbulakskogo mestorozhdeniya rud v Karakalpakstane. //KKOAnRUz, -Nukus. -zh.Vestnik. -2013. - Nr.1. -s.61-64.
3. Mikrokremnezem i ego primenenie. http://kazsilicon.kz/ru/node/89.
4. YEkonomika Uzbekistana. Informacionno-analiticheskiy byulleten` za 2014 god. - Tashkent. -2015. -S. 11.
5. Social`noe razvitie i uroven` zhizni v Uzbekistane. Statisticheskiy sbornik. Gosudarstvennyiy Komitet Respubliki Uzbekistan po statistike. -Tashkent. -2014. -S.20.
6. Promyishlennost` Uzbekistana. Statisticheskiy sbornik Goskomstat RUz. -Tashkent. -2014. -S.20.
7. Strategiya social`no-yekonomicheskogo razvitiya Respubliki Karakalpakstan. -Tashkent: IPMI. -2013. -S. 48-49.
8. Usmanov Z.K. Prioritetnyie napravleniya razvitiya promyishlennosti v Respublike Karakalpakstan / Z.K. Usmanov, M.A. Niyazov // YEkonomika i biznes: teoriya i praktika. -2015. - Nr.8. -S. 127-131.
9. Razrabotka zhelezorudnogo mestorozhdeniya Tebinbulak budet poyetapnoy 16 iyun`, 2016 g. htts://www.gazeta.uz/ru/2015/06.16/ore/.
10. Iskandarova M.I., Habirov R.S., Mironyuk N.A., Mahmudova N.K., Mirhamidova F. Ispol`zovanie staleplavil`nyih shlakov AO "Uzmetkombinat" - kak faktor snizheniya vyibrosov uglekislogo gaza, yekonomii prirodnyih syir`evyih i toplivo-yenergeticheskih resursov pri proizvodstve klinkera i cementa. //ZHurnal "YEkologicheskiy vestnik". - Nr.12. -2014. -s. 35-39.
11. Mironyuk N.A., Mahmudova N.K. Possibilities of Use of Steel-Smelting Slags as complex raw materials by production of cement clinker //International Conference on thermophysikal and mechanical properties of materials. TERMAN 2014. CESME-IZMIR/TURKEY. 12-15 june 2014. POSTER SESSION -P.79 -P.114-116.
12. Kaybicheva M. N., Bashkatov N. N., Serkova T. V. Vliyanie tonkosti pomola hvostov magnitnogo obogas`heniya titano-magnetitovyih rud na mikrostrukturu portlandcementnogo klinkera // Tez. dokl. NPK "Steklo i keramika: pr-vo i primenenie". -Moskva. 24-25 yanv. -1997. -S.47-48.
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UDK: 541.64.678
1A.T. Dzhalilov, H.H. Turaev, 2Sh.I. Mamatkulov, F.B. Eshkurbonov, Sh.A. Kasimov, M.B. Eshkurbonova
STUDY OF MORPHOLOGY OF COMPLEX COMPOUNDS OF FEW METALS WITH OBTAINED IONITES
1SUE Tashkent Scientific Research Institute of Chemical Technology, Tashkent, Uzbekistan
2UE Educational Center of High Technologies, Tashkent, Uzbekistan
Termez State University, Termez, Uzbekistan
Abstract. Background. At present, synthetic ion-exchange polymers become increasingly important, which is associated with their extensive use to solve environmental problems, complex processing of raw materials for the creation of non-waste technological schemes. Therefore, the study of the complexation of ion exchangers with ions of sorbed metals, the presence of a sorption process is also an actual task of inorganic and analytical chemistry.
Purpose is to obtain new polymer complex ion exchange resins based on DHT + GIPAN and its cobalt complex, to study their morphology and optical properties.
Methodology. The structure and properties of the resulting networked ion exchangers and their complex cobalt compounds by scanning electron microscopy and IR spectroscopy were studied.
Originality. The results of the study of morphology and optical properties of complex ion exchangers based on diglycidylthiourea and cobalt complex are presented. It is established that with increasing concentration of the cobalt complex in ion exchangers, the morphology changes, then the network on the surface of the samples changes Structural elements. It is shown that at high Co2+ contents, the structural elements of the compositions are grinded
Findings. The results of the EDAX device showed that in the ion exchangers the elemental composition is represented mainly by carbon, oxygen, nitrogen, sulfur, chlorine, sodium and cobalt. At the same time, the absorption bands in the 1320, 1121 cm-1 region, also associated with the -COONa group, are weakened. Analysis of IR spectra shows that the absorption bands at 479 cm-1 confirm the formation of the ν-Co-O bond in the complexes. The absorption bands of carboxyl groups corresponding to the stretching vibrations C = O and C = S are present in the region 1655, 1541, 1448 cm-1. This is due to the fact that when the proton of the carboxyl group is replaced by cobalt ions, the COO group remains, and the absorption bands at 1655, 1448, 1397 cm-1 and 1320 cm-1 are increased in the IR spectra of ion-exchange cobalt, attributed to asymmetric symmetric valence vibrations of carboxylate ions. The results of the elemental composition on the EDAX device show that the cobalt content is 4.3 and 0.2 wt. %.
Keywords. Complexation, cobalt ions, ion exchange, microstructure, composition, scanning electron microscopy, IR spectroscopy, ability, results, EDAX devices, curves.
Highlights:
* Complex ion exchangers based on DHT + GIPAN and their cobalt complex.
* The elemental composition on the EDAX device shows cobalt’s content 4.3 and 0.2 wt. %.
To cite this article: A.T. Dzhalilov, H.H. Turaev, Sh.I. Mamatkulov, F.B. Eshkurbonov, Sh.A. Kasimov, M.B. Eshkurbonova. Study of morphology of complex compounds of few metals with obtained ionites // Uzbek chemical journal.- 2018. – Nr1. – Pp.10-15.
Received: 14.12.2017; Accepted: 22.01.2018; Published: 27.02.2018
References
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2. Ergozhin E.E., Tausarova B.R. i dr. Issledovanie kompleksoobrazuyus`hey sposobnosti ionitov s razlichnyimi gruppami po otnosheniyu k ionam nekotoryih tyazhelyih i perehodnyih metallov. - Vestnik KazNU. Seriya himicheskaya. 2013. Nr.1(69). S. 84-89.
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6. Ryibaltovskiy A.O., Gerasimova V.I., Bogomolova L.D. i dr. Spektryi ?-diketonatov medi i evropiya v spirtovyih rastvorah i prozrachnyih diyelektrikah. ZHurnal prikladnoy spektroskopii. 2006, 73(4), 447-452.
7. Kattaev N.T., Babaev T.M., Ramazanov A.H. Issledovanie processa sorbcii ionov medi (II) novyim kompleksitom na osnove akrilonitrila // Universum: Himiya i biologiya : yelektron. nauchn. zhurn. 2016. Nr. 8 (26) . URL: http://7universum.com/ru/nature/archive/item/3457.
8. YEshkurbonov F.B., Dzhalilov A.T. Issledovanie sorbcionnyih svoystv poluchennogo ionita na osnove gidrolizovannogo poliakrilonitrila // Universum: Himiya i biologiya: yelektron. nauchn. zhurn. 2014. Nr. 3 (4) . URL: http://7universum.com/ru/nature/archive/item/1068.
9. YEshkurbonov F.B. Sintez i issledovanie amfolita na osnove gidrolizovannogo poliakrilonitrila. // Uzbekskiy himicheskiy zhurnal. - Tashkent, -2013. - Nr.6. - S.13-16.
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11. Turaev H.H., Dzhalilov A.T., Kasimov SH.A., YErgasheva N.N., YEshqurbonov F.B. Issledovanie sorbcii nekotoryih metallov na sintezirovannyih kompleksoobrazuyus`hih ionitah. // III mezhdunarodnaya konferenciya po himii i himicheskoy tehnologii. - 2013. - S. 453-455.
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UDK 669.213.6:669.053.4
S.N. Rasulova, V.P. Guro, M.A. Ibragimova, E.T. Safarov
OXIDATION AND PASSIVATION OF THE SULFIDE ORES SURFACE
Institute of General and Inorganic Chemistry of the Academy of Sciences of Uzbekistan, Tashkent, Uzbekistan,
E-mail: vpguro@rambler/ru
Abstract. Background. Raw materials of the mining-metallurgical industry of Uzbekistan, as well as of the rest world, are of sulfide minerals. The trend, caused by the tightening of environmental requirements for its functioning is to a complete abandonment of pyrometallurgy. The kinetics of such ores leaching depends, in particular, on the nature of the metal ion’s ligands. Their dissection is carried out in the environment of chloride s, bromides, iodides, fluorides, thiourea, thiosulphate, with oxidizers: chlorine, oxygen, nitric acid with O2, ozone, manganese (IV), iron (III), hypochlorite. Meanwhile, the oxidation-reduction potential (ORP) of the dispersion characterizes thermodynamics, but not the kinetics of the oxidation.
Purpose: applying oxidizers: hypochlorite and mixes ozone/oxygen + HNO3, to consider the kinetics of sulfide ores leaching
Methodology. The samples of ore and Kokpatas concentrate, chalcopyrite are investigated. ORP was measured at a pH meter EV-74. Elemental analysis – via KFK-2, ICP-MS; electrokinetics – at PI-50-1 potentiostat with a rotating disk electrode. The mode of autoclave oxidation was applied too.
Originality. A model for the sulphide minerals dissolution is proposed with depletion of the mineral by iron and copper from a solid to a liquid phase, due to diffusion through the sulfur sublattices, as the limiting stage of the process.
Findings. The ORP and the dissolution rates, over time, were measured for: 1) Kokpatas sulfide ore in hypochlorite and (HNO3+O3) media; 2) samples of chalcopyrite by gravimetry and electrochemistry.
Key words: sulfide ores, oxidation of sulphides, leaching, redox potential. dissolution kinetics of minerals.
Highlights:
* A model for the dissolution of sulphide minerals has been proposed;
* Electrokinetics measurements were made for chalcopyrite;
* The diffusion coefficient of metal ions in the S-lattice is calculated.
To cite this article: S.N. Rasulova, V.P. Guro, M.A. Ibragimova, E.T. Safarov. Oxidation and passivation of the sulfide ores surface // Uzbek chemical journal.- 2018. – Nr1. – Pp.15-21.
Received: 28.12.2017; Accepted: 28.01.2018; Published: 27.02.2018
References
1. Bogacheva L.M., Ismatov H.R. Gidrometallurgicheskaya pererabotka med`soderzha-s`hih mineralov. - Tashkent: izd-vo "Fan", 1989. - 116 s.
2. Bulenbaev M.ZH. Razrabotka tehnologii izvlecheniya zolota iz upornogo zolotoso-derzhas`hego syir`ya. Disser. na soisk. uch. st. PhD. Almatyi. - 2015. - 138 s .
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4. Patent RF ¹ 2120487. Sposob pererabotki zolotosoderzhas`hego syir`ya. Mel`ni-chenko E.I., Moiseenko V.G., Sergienko V.I. i dr. Zayavl.: 1997-12-23; opubl. 20.10.1998.
5. ZHarkenov M.I., Toktamyisov M.T., Satyibaldin O.B. YEffektivnost` vyis`helachiva-niya otval`nyih i bednyih rud cvetnyih i chyornyih metallov Kazahstana. Almatyi: KazGO-SINTI, 1993.S. 150.
6. Orlova O.D. Vyis`helachivanie blagorodnyih metallov iz rud hlorsoderzhas`himi rastvoritelyami // Obogas`henie poleznyih iskopaemyih.- g. Kiev, 1988, No 38, S. 45-52.
7. Patent RF ¹ 2090637. Sposob izvlecheniya blagorodnyih metallov iz rud. Gurov V.A.; Prioritetyi: podacha zayavki: 1996-07-09; publikaciya patenta: 20.09.1997.
8. Patent RF 2117709. Sposob okislitel`nogo avtoklavnogo vyis`helachivaniya po-limetallicheskih ferrosul`fidnyih materialov, soderzhas`hih dragocennyie metallyi. Kor-sunskiy V.I., Timoshenko YE.M., Naftal` M.N. i dr. Zayavl. 1997-10-13; opubl.: 20.08.1998.
9. Patent RF 2105824. Sposob gidrometallurgicheskogo izvlecheniya metallov iz kompleksnyih rud. Nomer zayavki: 95116518/02; Data podachi: 26.07.1995; Data publikacii: 27.02.1998; Avtor(yi): Robert N.O'brayen [CA];
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12. Izvlechenie molibdena iz sul`fidnoy rudyi s`helochnyim rastvorom gipohlorita natriya / V.I. Lucik, YU.M. Potashnikov, V.A. Lucik i dr. // Izv. Sib. otd. AN SSSR. Ser. him. nauk. - T. 4. - 1985. - No 11. - S. 49-54.
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UDK 631.85.661
N. Yo. Juraev, Sh. S. Namazov, А. А. Mamataliev, А. R. Setnazarov
CARBONATE-AMMONIUM NITRATE BASED ON AMMONIUM NITRATE MELT AND LIMESTONE
Institute of General and Inorganic Chemistry of the Academy of Sciences of Uzbekistan, Tashkent, Uzbekistan
Abstract. Bacgraund. In the scientific and technic literatures there are the studies on obtaining both the non-packing and thermostable ammonium nitrate (AN) by addition of inorganic materials. The worldwide reducing AN caking issue is solved by various additives such as dolomite, limestone, bentonite, caustic magnesite, phosphate-sulphur-boron that are mixing orthoboron acid, diammonium phosphate and ammonium sulphate. In present, in order to obtain non explosive fertilizers based on AN carbonate compounds (limestone, chalk, dolomite and others).in Europe and Russia carbonate-ammonium nitrate (CAN) production has been implemented by introduction dolomite or chalk in the AN. Thereby, in Uzbekistan production of CAN is topically to improve consumable properties of AN, increasing in export and reducing cost for final product. In case, limestone is being as local material much more perspective addition.
Purpose. Investigation of granular CAN based on melt NH4NO3 and limestone (СаСО3) from Jamansay and Karmanin deposits.
Methodology. Introduction powdered limestone in the melt NH4NO3 subsequent granulation of nitrate-carbonate melts by prilling, as well as determination of compositions and propertis of resulting fertilizers by known ways.
Originality. It was revealed that application CaCO3 as addition at weight ratio from 100:5 to 100:80 the strength of AN increased in 1.5-5.3 fold while the their dissolution speed is decreased in 2 times as compared in standard saltpeter.
Findings. To obtain CAN fertilizers weight ratio of NH4NO3: CaCO3 changed from 100 : 5 to 100 : 80. For granulation of nitrate-carbonate melts it was used balling approach. The composition and properties of novel fertilizers were studied. It has been shown when NH4NO3 : СаСО3 = 100 : 25 the product contents 28.02% N, 10.85% СаО and the strength equal to 5.30 МPа, which exceeds rather the strength of pure AN (1.32 МPа). Whereas the dissolution speed time of pure AN in water is 44.6 sec. With increasing dose of limestone to NH4NO3 : CaCO3 = 100 : 80 (for Кarmanin) the dissolution speed time of CAN grows up dramatically reaching to 92.7 sec.
Keywords: melt, limestone, carbonate-ammonium nitrate.
Highlights:
* Granules of carbonate-ammonium nitrate have been obtained;
* Limestone was introduced in a melt of NH4NO3;
* Their composition and properties were determined.
To cite this article: N. Yo. Juraev, Sh. S. Namazov, А. А. Mamataliev, А. R. Setnazarov. Carbonate-ammonium nitrate based on ammonium nitrate melt and limestone // Uzbek chemical journal. -2018. - Nr1. - Pp.21-28.
Received: 23.02.2018; Accepted: 26.02.2018; Published: 27.02.2018
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UDK 631.842.4
U. М. Turdialiev
AMMONIUM NITRATE AND WAY FOR IMPROVING ITS QUALITY
Institute of General and Inorganic Chemistry of the Academy of Sciences of Uzbekistan, Tashkent, Uzbekistan
Abstract. Background. Ammonium nitrate (AN) is the widest in the world effective nitrogen fertilizer. However, it has two serious lacks such as packing during the store and explosibility. To prevent its caking various additives are used binding free moisture effecting on polymorphic transition that forms crystallization centre and granule dusting. Whereas reducing explosion hazard are used as follows: carbonate containing compounds form natural and anthropogenicorigin; potassium containing substances, ammonium phosphate and sulfate, other ballast matters that are not useful (gypsum, phosphogypsum, bentonite and etc.). In case, bentonite clays are the perspective additives whose are sufficient enormousresources in Uzbekistan. Hence, experimentation on development of simplified technology both the non-packing and thermostable AN based on saltpeter and bentonite from Uzbekistan is the topical tasks. Granulation of AN with addition of bentonite clays to enter the into its malt before granulating is absent in the reference.
Purpose. To analyse different additives used and offered for application in manufacture of AN to improve its quality especially decreasing of packing and explosibility. The present review has the aim to systematize data on elimination of negative properties of AN, which are scattered in various special publications and patents.
Methodology. As selection from many additives eliminate blocking property and explosibility of AN.A basis of the fact that when mixing saltpetre contenting N from 34.5 to 26-28% by various inorganic additives as bentonite from Uzbekistan, its explosive property is reduced.
Introduction of bentonite powder can be offered directly in melt of AN while granulation of bentonite-nitrate melt is made by prilling in the tower.
Originality. When cooling saltpeter’s melt with bentonite there were revealed that absence of III phases and presence of direct polymorphic transition IV®II as opposed to pure saltpeter that leads to stable AN at variation temperature (25-55ºС) without destruction of granules. This is especially important during the storage and handling. It was established that bentonite provides inhibitory action on decomposition of AN increasing temperature of its destruction due to packing crystal structure. It was shown that the clay provides favourable buffer effect and stabilizes pH of AN.
Findings. The strong and weak sides of some additives improving quality of AN were described. Hereby, the bentonite can be the perspective addition. In addition, they belong to agronomic ore to grewfertility of soil and crop.
Keywords: ammonium nitrate, packing, explosibility, various inorganic additives, bentonite clay.
Highlights: рresented review is analyse of literature data on creation of technology as non-packing so thermo stable AN with different inorganic materials to appropriate possibility of application of bentonite whose resources are enough in Uzbekistan.
To cite this article: U. М. Turdialiev. Ammonium nitrate and way for improving its quality // Uzbek chemical journal. -2018. - Nr1. - Pp.28-41.
Received: 20.02.2018; Accepted: 26.02.2018; Published: 27.02.2018
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* * *
UDK 66.097.3 (088.8)
V.P. Guro, A.T. Dadakhodzhaev, M.A. Ibragimova, F.N.Fuzailova
PRODUCTION OF CADMIUM-CALCIUM-PHOSPHATE CATALYST OF ACETALDEHYDE SYNTHESIS
Institute of General and Inorganic Chemistry of the Academy of Sciences of Uzbekistan, Tashkent, Uzbekistan,
E-mail: vpguro@rambler/ru
Abstract. Background. The catalyst KKF-N TU 113-03-00209510-108-2006, developed by NIAP (RF) is applied at JSC "NAVOIYAZOT" in the production of acetaldehyde at a temperature of 340-350 °C and a pressure of 0.2-5-0.7 atm. The service life of the KKF is short: a reboot is required every 3-6 months, for which a new CCF is purchased. Meanwhile, it is possible to organize its production from local raw materials or from the spent catalyst of KKF, which requires the development of appropriate technology.
Purpose: the reasonable choice of the optimum way of synthesis of the catalyst of the KKF, the production of samples for the laboratory pilot-industrial test in the JSC "Navoiazot", the development of the technological process map.
Methodology. The mass fraction of cadmium oxide is determined according to TU 113-03-00209510-108-2006. For the synthesis of KKF, a method of precipitating a catalyst mass from Cd and Ca salts, in the presence of phosphate ions was used at pH (6.8-7.1). The laboratory thermostat and pH-meter EV-74 were used.
Originality. Technological parameters of the synthesis process of KKF, concentration, g/dm3, solutions: Cd(NO3)2, calculated as CdO, 22.8; Ca (NO3)2, in terms of CaO. 103.6; orthophosphoric acid - 25% weight; ammonia water - 10% weight. Precipitation of the KKF is carried out at pH 6.8-7.1; within 90 minutes; washing of the precipitate – upto the absence of NO3- ions; drying at a temperature of 100-110 °C; crushing, mixing with graphite (2% weight) and tableting.
Findings. Samples of the catalyst KKF by the developed technological scheme for the synthesis of acetaldehyde from the acetylene-vapor mixture in laboratory conditions were transferred to JSC "Navoiazot" for testing their catalytic activity. A technological process map has been created, the operating mode is periodic. Characteristics of the products are given.
Key words: production of acetaldehyde, catalyst, cadmium-calcium-phosphate mass; catalytic activity test.
Highlights:
* A technological map for the KKF-H synthesis process was developed;
* Samples of the KKF catalyst by the process map were obtained;
* Synthesized catalyst KKF samples were forwarded to JSC "Navoiazot".
To cite this article: V.P. Guro, A.T. Dadakhodzhaev, M.A. Ibragimova, F.N.Fuzailova. Production of cadmium-calcium-phosphate catalyst of acetaldehyde synthesis // Uzbek chemical journal.- 2018. – Nr1. – Pp.41-46.
Received: 23.01.2018; Accepted: 26.02.2018; Published: 27.02.2018
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8. Tananaev I.V., Mzareulishvili H.B. Izuchenie reakciy obrazovaniya gidrookisi kadmiya // ZHPH, T1 (1956). - S. 2225.
9. Shapkin M.A., Dvoynoy superfosfat, "Himiya", Leningrad (1987).
10. Postnikov N.N. Po povodu zamechaniy P.V. Gol`da k stat`e "Sravnitel`noe vosstanovlenie trikal`ciyfosfata gazoobraznyimi vosstanovitelyami - vodorodom, opis`yu ugleroda i tverdyim uglerodom", M.E. Porey, B.A. Kopyilev i Van-Li-shyen. Issledovanie metastabil`nyih ravnovesiy v sisteme SaO-VO5- N2S // ZHPH, HHHIII - 5 (1960). - S. 1430, 1482.
11. Pozin M.E. Tehnologiya mineral`nyih soley. L.: "Himiya", (1970). - S. 982, 1318, 1344, 1366.
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ORGANIC CHEMISTRY
UDK 544.344.016
O.R. Akhmedov., Sh.A. Shomurotov.,A.S. Turaev., H.S. Talipova
PHYSICOCHEMICAL METHODS OF RESEARCH OF GUANIIDIN CELLULOSE
1Institute of Bioorganic Chemistry, Academy of Sciences of Uzbekistan, ul. M. Ulugbek 83, Tashkent 100125,
e-mail: ibchem@uzsci.net, 2Tashkent Chemical and Technology Institute
Abstract. Background. The high practical value of cationic polyelectrolytes makes it necessary to study their structural features, molecular parameters, and physicochemical properties. Important characteristics such as molecular weight, thermal stability, supramolecular structure, solubility, and рКа value of cationic polymers not only determine their practical importance in various industries, but also provide them with the necessary biological activity.
Purpose. To determine the supramolecular structure, thermal stability, molecular parameters, and the рКа, value of guanidine-containing cellulose derivatives through physicochemical methods.
Methodology. The supramolecular structure of the samples was studied through X-ray diffraction and electron microscopy, and the value of рКа, was found by inverse titration. Molecular weight characteristics of cellulose guanidine were determined by the method of ELC on the liquid chromatograph. Thermoanalytical studies were carried out using thermogravimetric analysis and differential scanning calorimetry.
Originality. For the first time the paper contains data covering reaserch of such characteristics as supramolecular structure, average molecular weight, thermal stability, and рКа value of guanidine-containing cellulose derivatives, which by properties refer to cationic polymers.
Findings. Supramolecular structure, molecular parameters, thermal stability, and the value of рКа guanidine cellulose were derived through physicochemical methods.
Keywords: polyelectrolyte, cationic polymer, guanidine cellulose, thermogram, X-ray diffraction pattern, crystallinity, molecular weight, рКа.
Highlight:
* The properties of guanidine cellulose were studied by physicochemical methods.
* Supramolecular structure, thermal stability, molecular weight, and рКа of guanidine cellulose were determined.
To cite this article: O.R. Akhmedov., Sh.A. Shomurotov.,A.S. Turaev., H.S. Talipova. Physicochemical methods of research of guaniidin cellulose // Uzbek chemical journal.- 2018. – Nr1. – Pp.47-52.
Received: 08.02.2018; Accepted: 21.02.2018; Published: 27.02.2018
References
1. Xue Ya., Xiao H. // Polymers. -2015. - Vol.7(11). -P. 2290-2303.
2. Timofeeva L., Kleshcheva N. //Appl. Microbiol. Biotechnol.-2011.-Vol.89.-Р.475-492.
3. Verlee, S. Mincke, Ch. Stevens. // Carbohydrate Polymers. 2017. -Vol. 164, -Р. 268–283.
4. Kedik S.A., Shatalov D.O., Isaykina P.M., Askretkov A.D., Sedishev I.P., Panov 5. A.V., Evseeva A.S. // Khimiko-farmatsevticheskiy zhurnal. -2017. - No.9.-P. 24-27.
6. Shomurotov Sh.А., АhmedovО.R. // Uzbekskiy khimicheskiy zhurnal. -2011. Spetc vypusk. -S. 79-82.
7. Аhmedov О.R., Shomurotov Sh.А., Turaev А.S. // Sovremennye aktualnye problem estestvennykh nauk. Materialy mezhdunarodnoy nauchno-prakticheskoy internet-konferentsii. Aktobe. Kazakhstan. -2014. 18-27 dekabr. -Т.1. -S. 98-101.
8. Аhmedov О.R., Shomurotov Sh.А., TuraevА.S. // Farmatsevticheskiy Vestnik Uzbekistana. -2016. - No.3. -S.94-98.
9. Boymirzaev A.S. // Sorbtsionnye i khromatograficheskie protsessy. -2007. -T.7. - No.2. -S.251-258.
10. Alyoshina L.A., Melekh N.V., Fofanov A.D. // Khimiia rastitel,nogo syr,ia -2005. - No.3. -S.31–59.
11./ Kulish E.I., Shurshina A.S., Kolesov S.V. // Vestnik Bashkirskogo universiteta. -2014. -Т.19. -P.34-37.
12. Siedenbiedel F., Tiller J.С. // Polymers.-2012.-Vol. 4. -P.46-71.
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UDK 541.64
U.М.Мirzayev, Sh.S.Djalilov, A.S.Ergashev, R.I.Ismailov
HOMO- AND COPOLYMERIZATION OF N-VINYLCAPACLACTAM AT RELATEVELY LOW TEMPERATURES
Ташкентский государственный технический университет, i.ravshan1972@mail.ru
Abstract. Background. The actual direction is to conduct low-temperature homopolymerization of N-vinylcaprolactam and its copolymerization with unsaturated compounds in the mass, in a presence of benzoyle peroxide with styrene, ethyl methacrylate, n-butyl methacrylate and acrylonitrile. Study of characteristic viscosities of copolymers of N-vinylcaprolactam with acrylates allows to calculate copolymerization constants and relative activity of monomers to radicals by special mathematic method.
Purpose. The aim of the study is the low-temperature homopolymerization of N-vinylcaprolactam and its copolymerization with unsaturated compounds in bulk in the presence of initiators.
Methodology. The homopolymerization of N-vinylcaprolactam was carried out in the presence of peroxide compounds at temperatures that exclude the breakdown of the initiator. Based on the experimental data, the kinetic equation of the total polymerization rate of N-VKL in the presence of benzoyl peroxide in ethanol and the total activation energy are calculated. This is confirmed by IR- spectroscopy.
Originality. N-vinylcaprolactam-based homo- and copolymers have been synthesized in the presence of an initiator at relatively low temperature.
Findings. At relatively low temperatures, homopolymerization and copolymerization of the polymers by the oxidation-reduction method have been synthesized and the root-mean-square errors in the determination of copolymerization constants have been calculated with the help of least squares.
Keywords: homo- and copolymerization, N-vinylcaprolactam, benzoyl peroxide, styrene, ethyl methacrylate, n-butyl methacrylate, acrylonitrile.
Highights:
* Homo- and copolymers were synthesized by complex-radical method based on N-vinylcaprolactam;
* Synthesis was carried out at relatively low temperature in the presence of initiators.
To cite this article: U.М.Мirzayev, Sh.S.Djalilov, A.S.Ergashev, R.I.Ismailov. Homo- and copolymerization of N-vinylcapaclactam at relatevely low temperatures.// Uzbek chemical journal.- 2018. – Nr1. – Pp.53-58.
Received: 26.12.2017; Accepted: 10.01.2018; Published: 27.02.2018
References
1. Ismailov I.I., Dzhalilov A.T., Askarov M.A. Himicheski aktivnyie polimeryi i oligomeryi // Monografiya, izd., "Fan" ANRUz., 1993. -232 s.
2. Kudyishkin V.O., Abdurahmanova T.R., Bozorov N.I. Radikal`naya polimerizaciya N-vinilkaprolaktama v izopropanole // ZHurn. Prikl. Himii, 2002. -T.75, No9. -S.1497-1499.
3. Ismailov.I.I., Mirhozhaev.M., Askarov.M.A. Donorno-akceptornoe iniciirovanie sovmestnoy polimerizacii N- vinilkaprolaktama s nenasyis`hennyimi kislotami // Dokladyi AN Uz., 1991, -No7, -S. 42.
4. CHurilina E.V. Radikal`naya sopolimerizaciya N-vinilkaprolaktama s N-vinilazolami i svoystva vodnyih rastvorov polimerov // Diss. k.h.n., -M.: 2004.
5. Havula E.V., Kuznecov V.A., Verezhnikova V.N., SHatalov G.V. Radikal`naya sopolimerizaciya N-vinilkaprolaktama s N-vinil -1,2,3-trizolami i svoystva vodnyih rastvorov sopolimerov // Vyisokmolek. Soed.Ser. B, -2003. -T.45, No2. -S.341-346.
6. Makhaev E.E. Behaviourofpoly (N-vinilcaprolactam) macromolecules in the presenceofcompoundsinaqueoussolution // Polymer, 2000. Vol.41. No 26. -P.9139-9145.
7. Cheng S.C., Feng W., Pashikin I., Yuan L.H., Deng H.C., Zhou Y. Radiation polymerization of thermo-sensitive poly (N-vinycaprolactam) // Radiation physics and chemistry. 2002. -Vol. 63, No 3-6. -P.517-519.
8. CHyen` Sin`. Kineticheskie osobennosti psevdozhivoy radikal`noy polimerizacii stirola i 4-vinilpiridina v prisutstvii nitroksila TEMPO: Dis...kand.him.nauk: - Moskva, Moskovskiy gosudarstvennyiy universitet im. M.V.Lomonosova, 2010. - 132 s.
9. Lozinsky Y.I., Simenel I.A., Kurskaya E.A., Kulakova V.K. Synthesis of N-vinilcaprolactam polymers in water-containing media // Polymer 2010. Vol. 41, No 17. -P.6507-6518.
10. Maeda Y. Hydration and phase behavior of poly (N-vinylcaprolactam) and poly (N-vinilpyrrolidone) in water. Macromolecules.-2012.-V.35, No 1. -P.217-222.
11. Arifzhonova M.A., Dehkonov R., Abdullaev F.T., Mirzaev U.M. Gidro-dinamicheskie i konformacionnyie svoystva sopolimerov N-alkilol-akrilamidov s N-vinillaktamami // Himiya i himicheskaya tehnologiya, 2013, No 3. S.33-38.
12. Mirzaev U.M., Ayupova M.A., Usmonova G.A. Synthesis and properties of acrylamide sopolymers with N-vinyllactams // European Applied Sciences. -No 1. 2016. -P. 86-89.
13. Mirzaev U.M. Islodovanie processov kompleksoobrazovaniya biologicheski aktivnyih ves`hestv i sinteticheskih polimerov // Vestnik TashGTU. -No 1. 2016. -S. 139-145.
14. Mirzaev U.M., Ismailov I.I. Some conformational parameters of conjoint polymer N-vinillactam with N- alcylolacrylamid // The advanced science journal. -United States, Issue 4-2014. -P.75-80.
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UDC 678.664-405.8 '+ 547.333.4'304.9
R.I. Adilov, M.G. Alimukhamedov, F.A. Magrupov
POLYFUNCTIONAL REACTIVE OLIGOMERS OF N-BENZYLIDENE-N-2-HYDROXYETHYL-N-2,3-EPOXYPROPYL AMMONIUM CHLORIDE - MODIFIERS OF STIFF POLYURETHANE FOAMS
Tashkent chemical-technological institute, e-mail: asror_tcti@mail.ru
Abstract. Background. Polyurethane foams (PUF) are widely used in civil, industrial and rural construction and corrective maintenance of industrial refrigerators, production of household refrigerators, etc. Such a variety of industries is due to many successes of science and industry producing urethane materials. In the chemistry and technology of obtaining stiff PPU there is a number of unsolved problems, among which, in particular, are: lowering the flammability of PPU, developing efficient, less toxic catalytic systems, obtaining lightweight plastic foams, searching for and synthesizing modifiers of PUF properties.
Purpose: To study the ways of modification of stiff polyurethane foams by N-benzylidene-N-2-hydroxyethyl-N-2,3-epoxypropyl ammonium chloride olшgomers (OBGEPAH).
Methodology: In the research, empirical methods of phenomena cognition were used, consisting in the analysis of literary data on the topic and the subsequent development of an action plan in the direction of modifying the properties of existing objects. In the work, such research methods as quantitative chemical analysis, standardized methods for determining the physical and mechanical properties of plastics, as well as a standard method for carrying out the technological sample of compositions for the production of polyurethane foams have been used.
Originality: OBGEPAH improves the index of bending strength and toughness of foams. Introduction of OBGEEPAH in the composition of the SPUF allows to reduce the loss of mass during combustion in the fire tube to 71%. It was found that OGEPEP is a polyfunctional reagent, performs the functions of a soft catalyst, cross-linking agent and flame retardant.
Findings: OBGEPAH in the formulation for the preparation of the SPUF functions as a property modifier and allows to control the technological parameters of the foaming of the foaming compositions. At the same time, it is possible to regulate the properties and parameters of the SPUF molding, both by changing the number average molecular weight of the OBGEPAH, and by varying its content in the composition of the foaming compositions. Introduction of OBGEEPAX in to the composition of the stiff polyurethane foam allows reducing the amount of hydroxypropylated ethylenediamine by 50%. It should be noted that, due to the presence of hydroxyl groups in each elementary unit of the OBGEPAH, it more efficiently accelerates the gelatinization reaction, i.e. urethane formation. At the same time, due to the lower functionality of the OBGEEPAH, it was possible to dramatically improve the bending strength index and the toughness of the foams.
Key words: N-benzylidene-N-2-hydroxyethyl-2,3-epoxypropyl ammonium chloride oligomer, stiff polyurethane foams, soft catalyst, flame retardant, cross-linking agent.
Highlights:
Oligomers OBGEEPAX allow reducing the amount of hydroxypropylated ethylenediamine by 50%.
It is possible to modify a number of important operational polyurethane foams.
To cite this article: R.I. Adilov, M.G. Alimukhamedov, F.A. Magrupov. Polyfunctional reactive oligomers of N-benzylidene-N-2-hydroxyethyl-N-2,3-epoxypropyl ammonium chloride - modifiers of stiff polyurethane foams // Uzbek chemical journal.- 2018. – Nr1. – Pp.54-58.
Received: 05.01.2018; Accepted: 13.01.2018; Published: 27.02.2018
References
1. Randall D. The polyurethanes book. John Wiley and Sons LTD / D. Randall, S. Lee. 2002. – 477 p.
2. Poliuretani-2016. Materialy konferensiya. – М., 2016. www.neftegaz.ru
3. Malkanduev Yu.A., Sarbasheva A.I. Radikalnaya polimerizasiya chetvertichnih ammonievih soley // Nalchik, Izd-vo “Polygrafiya”, 2011. – 83 s.
4. Djalilov A.T., Malkanduev Yu.A., Mikitaev A.K. Sintez I svoqstva reaksionnoaktivnih polimerov // Moskvaа, izd-vo RXTU, 2011. – 282 s.
5. М.А. Askarov, А.Т. Djalilov. Sintez ionogennex polimerov // AN UzSSR, Ins-t himiya, Tashkent, Fan, 1978. – 159 s.
6. Murzakanova M.M., Barukaev T.A., Mikitaev А.Х. Povishenie ustoychivosti PEVP k deystviyu UF-sveta // Plasticheskie massi, 2012. – No5. – S.13-16.
7. Levashova V.I., Nikonova V.I. Sintez I issledovanie svoystv chetvertichnih ammonievih soley na osnove etanolaminov i epihlorgidrina // Bach. Him.j., 2008, т.15, – No.3. – S. 26-28.
8. Balayan S.R., Alimuhamedov M.G., Magrupov F.A. Snijenie goryuchesti jestkih penopoliuretanov ispolzovaniem furansodersashih chetvertichnih soleq I trihloretilfosfata // plasricheskie massi, 1992. No10. – S. 54-57.
9. Evseev L.D. О pojarnoy opasnosti penopoliuretanov // Poliuretanovie tehnologii, 2007, – No 4. – 11 s.
10. Adilov R.I. Zakonomernosti obrozovaniya monomernih I oligomernih produktov vzaimodeystviya monoetanolamina I aldegidov // Kimyo va kimyo tehnologiyasi, 2016, mahsus son, – 43-50 s.
11. Mihail Ionescu. Chemistry and technology of polyols for polyurethanes. Rapra
Technologylimited, London, 2005. – 586 p.
12. Irjak V.I. Topologicheskaya struktura polimerov. Kazan, izd-vo KITU, 2013. – 520 s.
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UDK 547.382..384.398
S.E.Nurmanov, M.E.Mavloniy, D.X.Mirxamitova, O.N.Ruzimuratov, Sh.Turasunnat
ROLE OF CATALYTIC SYSTEMS IN A SYNTHESIS OF N-VINYLPIPERIDINE
1NUUz named after Mirzo Ulugbek, Tashkent, a university town -4, E-mail: nurmonov_se@mail.ru
IM AS RUZ, Tashkent, ul.Kadiriy -7
Abstract. Background. Investigation of reaction of pyperidine with acetylene in homogeneous conditions with using of supervase system KOH-DMSO, KOH-DMFA as catalyst-solvent and also in heterogeneous conditions in the presense of catalyst obtained from KOH, impregnation activated coal indegrano to UF dispergation is an actual problem. UF-treatment was carried ont with aim of decreasing of particles dimentions in water suspention of activated coal in regime 0,6 A and 38 kgr during of different time. Influence of nature of solvent, temperature of process on yield of N-vinylpyperidine and also time of dispergation on dimentions of particles of activated coal and correspondenly on yield of obtained product has been investigated.
Purpose. Aim of this investigation is carrying out of vinylation of pyperidine in, homo- and heterogeneous conditions in presence of superbasemedims and KOH inpregnated on activated coal.
Methodology. Reaction of vinylation of pyperidine was caried and in Laboratorical conditions in gomo- and heterogeneous conditions with using of KOH-DMSO and KOH-DMFA as systems catalyst-solvent and KOH impregnated on activated coal whict were undegono to ultra-sound dispergating.
Originality. Using of superbase system as catalyst and also nanostructural catalyst on the base of KOH impegnated on activated coal at vinylation of pyperidine.
Findings. N-vinylpyperidine was synthesised by reaction of pyperidine with acetylene. Yeld of product in homogencous conditions in the presence of KOH-DMSO as systhem catalyst-solvent was equaled 27% and in heterogeneous conditions in the preseuce of KOH impregnated on activated coal was equaled befor 41,2%.
Kew words: homogeneous catalysts, heterogeneous catalysis, highfase systems, vinylation, pyperidine, N-vinylpyperidine.
Highlights:
* Optimal counditions of vinylation of pyperidine by acetylene in homo- and heterogeneous conditions were determined;
* Dependence of yield of N-vinylpyperidino from disperse of activated coal e (bearer of catalyst) also was determined
To cite this article: S.E.Nurmanov, M.E.Mavloniy, D.X.Mirxamitova, O.N.Ruzimuratov, Sh.Turasunnat. Role of catalytic systems in a synthesis of N-vinylpiperidine // Uzbek chemical journal.- 2018. – Nr1. – Pp.65-72.
Received: 14.02.2017; Accepted: 10.10.2017; Published: 27.02.2018
References
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2. Trofimov B.A., Morozova L.V., Mihaltva A.I., Fekdman V.D. Polifunksionalnie vinilovie efiti - sshvayshie ajenti dly butadien-nitrilnogo kauchuka// JPH. -Leningrad, -1993, -Nr.4. -S.942-945.
3. Temkin O.H. Himiy asetilena “Asetilenovoe derevo” v organicheskoy himii XXI veka // Sorosovskiy obrazavatelniy gurnal. -Sorosov -2001. -T.7. –Nr.6 -S.35-38.
4. Temkin O.H. Kataliticheskay himiy// Sorosovskiy obrazavatelniy gurnal. -Sorosov -1996. –Nr.1 -S.57-65.
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6. D.H.Mirhamitova, O.H.Ruzimuratov, S.E.Nurmanov Novie podhodi formirovaniy nanostrukturnih katalizatorov dly sinteza vinilovih soedineniy. Materiali Resp.nauch.-tehn. Konf. -Navoiy -2012. -S.356.
7. O.Ruzimuradov, S.Nurmanov, M.Hojamberdiev, Enviromentally friendaly methodologies of advanced nanoarchitectures for photocatalytic applicacations. Materiali I Megd.nauch.-prak.konf. -Samarkand, -2012, 26-28 маrt, -S.266-267.
8. Ruzimuradov О., Nurmanov S., Hojamberdiev M. Fabricasion of nitrogen-doped TiO2monolit with well-defined macroporous and bicrystalline framework and its photocatalytic performance under visible light //Journal of the European CeramicSociety. -Amsterdam (Netherland) -2014 -34 -P.809-816.
9. Trofimov B.A., Tarasova O.A., Iemetova M.A., Afonin A.B., Kliba L.V., Baykalova L.V., Mihaleva A.I. N-izopropenilazoli I. Pryamoe izopropenilirovanie azolov propinom i allenom // JOrH. -Leningrad -2003 -T.39. -S.437-439.
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11. Nurkeeva Z.S., Abdel Aal A.-S., Khutoryanskiy V.V., Mun G.A., Beksyrgaeva A.G. Radiation grafting from binary monomer mixtures.I.Vinyl ether of monoethanolamine and vinyl ether of ethyleneglycol // Radiat. Phys.Chem.-2003.-Vol.67. -no.6. -P.717-722.
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UDK 685.315:541.64:678
Ibragimov A.T.
PECULIARITIES OF METHOD OF CASTING OF ELASTOPOLYMER MIXTURES IN THE MANUFACTURE OF SYNTHETIC MATERIALS FOR SHOE SOLES
Tashkent Institute of Textile and Light Industry, Tashkent, Uzbekistan, e-mail: abdusattor.ibragimov1963@mail.ru
Abstract. Background. Recently, in many countries of the world, in the manufacture of shoe soles, increasing attention has been paid to the application of the injection molding method using efficient raw materials, such as thermoplastic rubbers (TPR) based on different types of rubbers, polyvinyl chloride (PVC) plastics, ethylene copolymer with vinyl acetate (EVA) and thermoplastic elastomers of composites.
If we take into account that most of the raw materials and components used for shoes, including the finished sole, are brought to our republic from foreign countries, mainly from China, the problem of producing polymer materials using local ingredients and ingredients will be even more obvious. In this regard, we investigated injection-molded elastopolymer mixtures in the aggregate of components, especially synthetic butadiene-nitrile rubber of the SKN brand and polyolefin resins - low-density polyethylene (LDPE), a product produced by the Shurtan Gas Chemical Complex and PVC plastic compounds, followed by the creation of thermoplastic elastomers TEP) compositions for the production of shoe sole materials.
Purpose: to develop the possibility of using local raw materials and components to create polymer compositions with the subsequent production of shoe-based plantar materials on their basis.
Methodology: viscosimetry, injection molding.
Originality. Taking into account the viscosity and technological properties of different types of rubbers, TEP of a composition of rubbers with LDPE and PVC plastic was obtained and investigated. The dependence of processing temperature and pressure on the type and composition of the elastopolymer composition was determined.
Findings. The best fluidity is possessed by isoprene and butadiene-nitrile rubber. Introduction of up to 30 wt. h. LDPE in the composition increases the fluidity at the processing temperature up to four times. To prevent premature scorching, the pressure and temperature of the processing should be regulated, as well as the diameter of the nozzle of the casting unit.
Key words: injection molding, elastopolymer mixtures, composites, all-molded polymer composition, shoe plantar material.
Highlights:
* Molded polymeric materials based on TEP compositions for manufacturing shoe soles were obtained.
* The best fluidity is possessed by isoprene and butadiene-nitrile rubber.
To cite this article: A.T.Ibragimov. Peculiarities of method of casting of elastopolymer mixtures in the manufacture of synthetic materials for shoe soles // Uzbek chemical journal.- 2018. – Nr1. – Pp.73-79.
Received: 27.12.2017; Accepted: 08.01.2018; Published: 27.02.2018
References
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S. Х. Azimov, B. S. Zakirov, A. Х. Narхodjaev
STUDY OF INTERACTION OF AMMONIUM NITRATE AND ACETIC ACID MONOETHANOLAMMONIUM MONOHYDRATE ACETATE COPPER PHYSICO-CHEMICAL METHODS OF ANALYSIS
IONH AS RUz, 77-a, ul. Mirzo Ulugbek, 700170, Tashkent,
Tel: (99871) 262-56-60, Fax: (99871) 262-79-90, E-mail: saydullo_84@mail.ru
Abstract. Background. At present, the creation of technology for obtaining new effective complex-acting plant growth stimulants has become one of the most important global problems of our time. In this case, additional experimental studies are needed to elucidate the identification of molecular structures of synthesized new preparations by physico-chemical analysis methods. In connection with this, a new complex was synthesized based ammonium nitrate and acetic acid monoethanolammonium monohydrate acetate copper physico-chemical analyzes were performed to determine the molecular composition of the complex ammonium nitrate acetic acid monoethanolammonium monohydrate acetate copper.
The purpose of this work is to study the physicochemical methods of the synthesized complex ammonium nitrate acetic acid monoethanolammonium monohydrate acetate copper, which is obtained under certain conditions.
Methodology: To determine and establish the structure of the molecule of the synthesized compound, known methods of physical and chemical analysis were used: X-ray phase, thermal and IR spectral analyzes.
Originality. Complexation of ammonium nitrate was studied ammonium nitrate and acetic acid monoethanolammonium monohydrate acetate copper in an aqueous medium. It is proved that the complex NH4NO3•СН3СООН∙NH2C2H4OH∙(CH3COO-)Cu∙H2O. The physico-chemical stability constants of the new complex obtained are found.
Findings. The structures of the compounds were established using methods of physicochemical analysis: X-ray phase, thermal and IR spectral analyzes. X-ray phase analysis showed that the resulting complex is characterized by new values of interplanar distances, which confirms its individuality.
Thermal analysis of the synthesized complex shows that the observed one endothermic effect is accompanied by the loss of mass of the substance and is due to the melting of the salt. The nature of the subsequent exoeffects on the heating curve of the synthesized compound is related to the continuation of the decomposition and combustion of thermolysis products.
The IR spectrum of the new complex showed that the spectra of ammonium nitrate and the synthesized complex differ from each other, new frequencies appeared that were absent in the initial one ammonium nitrate and acetic acid monoethanolammonium monohydrate acetate copper.
Key words: ammonium nitrate, acetic acid monoethanolammonium monohydrate acetate copper, X-ray phase analysis, thermal analysis, IR spectrum.
Highlights:
* Study of the interaction in the triple water system: ammonium nitrate - acetic acid monoethanolammonium monohydrate acetate copper – water;
* Establishment of the molecular structure of a new complex by the method of physical and chemical analysis.
To cite this article: S. Х. Azimov, B. S. Zakirov, A. Х. Narхodjaev. Study of interaction of ammonium nitrate and acetic acid monoethanolammonium monohydrate acetate copper physico-chemical methods of analysis // Uzbek chemical journal.- 2018. – Nr1. – Pp.80-87.
Received: 23.02.2018; Accepted: 26.02.2018; Published: 27.02.2018
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ANALYTICAL CHEMISTRY
UDC 543.25: 542.92: 541.13: 541.8
N.H. Kutlimurotova, Z.A. Smanova
CONDOMTOMETRIC TITRATION OF THORIUM BY SOLUTION 2.7 - DINITROSO-1,8-NAPHTHALINE-3,6-DISULPHOIC ACIDS
National University of Uzbekistan, E-mail: Nigora.qutlimurotova@mail.ru
Abstract. Background. Method of conductometrical determination of thorium by solution 2,7-dinitrozo-1,8-naphtaline-3,6-disulfoacid on different by acid-basical properties phone electrolytes and buffer mixtures was elaborated. Conditions of titration were optimized and also it was shown that the best by form curves and results of Th determination were obtained on universal buffer Briton –Robinson in weak-acid mediums. It was shown possibility of conductometrical titration of Th by 2,7-dinitrozo-1,8-naphthaline-3,6-disulfoacid and also conditions of this process have been optimized. The elaborated conductometrical method of thorium determination was valued by metrological and also on the base of it`s absorbtional characteristics.
Purpose of work consist in determination of thorium by new synthesized reagent 2,7-dinitroazo-1,8,-naphtalin-3,6-disulfoacid by method of conductometry.
Methodology: method of carrying out determination of Th+4 aliqutical part (20,0 sm3 ) of precise concentration solution of thorium(IV) was placed in electrolytic cell than buffer solution was added and electrode was placed in investigated solution and after this titration was carried out by 0,1% solution by 2,7 dinitrozo-1,8,-naphtalin-3,6-disulfoacid at constant mixing of mixthere.
Originality conductometrical methods of determination of Th- ions with organic reagents were elaborated.
Findings: process of complex-formation of thorium (IV) with 2,7-dinitroazo-1,8,-naphtalin-3,6-disulfoacid has been investigated and also optimal conditions of complex-formation were determined. The maximum light absorption of the solutions of the reagent and the complex is observed at 400 and 500 nm, respectively. The optimum acidity of the medium is in the pH range 3-5.
Keywords: thorium, conductometric titration, 2,7-dinitrozo-1,8-naphtaline-3,6-disulfoacid, photometry.
Highlights.
* Elaborated conductometrical and photometrical methods were in analysis of probes on the determination of Th(IV) by 0,1 2,7 dinitrozo-1,8,-naphtalin-3,6-disulfoacid in different by composition natural object and industrial materials.
To cite this article: N.H. Kutlimurotova, Z.A. Smanova. Condomtometric titration of thorium by solution 2.7 - dinitroso-1,8-naphthaline-3,6-disulphoic acids // Uzbek chemical journal.- 2018. – Nr1. – Pp.88-92.
Received: 18.01.2018; Accepted: 19.02.2018; Published: 27.02.2018
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