CHEMISTRY AND CHEMICAL ENGINEERING

KIMYO VA KIMYO TEXNOLOGIYASI

TECHNOLOGY OF INORGANIC SUBSTANCES AND MATERIALS

 

Ergashev D.A., Guchchiev U.U., Askarova M.K., Tuxtaev S.

The solubility of component is studied in system Ca(ClO₃)₂-Mg(ClO₃)₂-H₂O

The solubility of component of Ca(ClO3)2-Mg(ClO3)2-H2O system by visual-polythermal method in the range of temperature and concentrations is shown in this study. On phase diagram of field of crystallizations of ice, six-, four and two water calcium chlorate, sixteen-, twelve-, six and four water magnesium chlorate are delimited.

 

Razzokov J.I., Gofurov Sh.P., Ismailova O.B., Mamatkulov Sh.I., Kokhkharov A.M.

Structural investigation of aqueous solutions of acetic acid by methods of dielectrical and optical spectroscopies

Dielectric permittivity of aqueous solutions of acetic acid (ACA) in wide range of concentration (~0÷1.0 molar fraction) has been studied by the method of molecular dynamics. The comparison of curves of excess dielectric permittivity depends on the concentration and experimental data of excess refractive indexes are presented. For the first time, it has been established that stable heteromolecular complexes of “water—acetic acid” mixture are formed in the concentration range of 0.25÷0.35 molar fraction. This is confirmed by the extremum values of excessive dielectric permittivity and excess refractive index of aqueous solutions of acetic acid.

 

Karimov M.U., Jalilov A.T., Eshkurbanov F.B.

The study of physical - mechanical properties of mortars with superplasticizer Dj-1

The results of tests of physical - mechanical properties of cement, plaster and high aluminate solutions with the addition of superplasticizer synthesized Dj-1. The resulting superplasticizer has good dispersing properties for dry construction materials and improves the rheological, physical - mechanical properties of building compositions.

 

CHEMISTRY AND TECHNOLOGY OF ORGANIC SUBSTANCES

 

Maxsumov A.G., Hamrayev K.Sh., Tillaeyv A.T., Shomurotova Sh.H., Amanov R.A. Receiving derivative –

1-[(2,4,6 trichlorophenil)-azo-4‘-(n-diethilamino-butyne-2‘-carbamate)] and their chemical properties

The designed methods of the reception derived anti-1' [(2,4,6 -an threexlorfenil)-азо-4'-(N-dietilaminbutin-2')-fenilkarbamat], studied its chemical characteristic : reactions N-alkilinations, nitrozozinationsand chlorinations.

 

Urinov U.K., Maksumova O. S, Ergasheva D.A.

Research of interaction of morpholine oligomer and epichlorhydrin with copper sulphate

Results of spectral studying of complexation reaction of oligomer on the bases morpholine and epichlorhydrin with copper nitrate in water solutions are presented. It is noticed that active complexation of the studied systems that is shown in change of electronic spectra of absorption.

 

Hoshimov F.F., Karimov R.K. Liquid-phase methods reception polymer complex routine

Process of the receiving of complexes routine with polyvinylpyrrolidone in liquid-phase method are studied and it is developed an optimal condition of synthesis of rutipol. Formed main factors are determined, influencing on process of the reception of substances.

 

TECHNOLOGY OF POLYMER AND COMPOSITE MATERIALS

 

Abdullaev F. T., Mirzaev U.M., Djamolova L.J., Shukurullaeva M.R. Conformational properties of

polytrichlorphenilacrylate, copolymers N-vinylpirrolidon with trichlorphenilacrylate and trichlorphenilmetacrylate

There are studied the hydrodynamic and conformational properties of polytrichlorpheilacrylate, copolymers N-vinylpirrolidon with trichlorphenilacrylate and trichlorphenilmetacrylate. On the base of sedimentation, diffuse metrical and viscos metric researches there are defined the parameters of equations of Mark-Kun-Chauvin.

 

Inagamov S.Ya., Ahmadjonov Z.I., Karimov A.K., Mukhamedov G.I.

Thermodynamic properties interpolymeric complexes of basis sodium carboxmethylsellulose

Studied the sorption properties interpolymeric complexes based on sodium carboxymethylcellulose with ureaformaldehyde oligomers and the original constituents. The results of the thermodynamic properties shows that complexation with sodium carboxymethylcellulose and ureaformaldehyde oligomers accompanied by negative changes in displacement, which is an important condition for thermodynamic compatibility indicative of the formation of hydrogen and ionic bonds between the interacting components.

 

Abdurahmanov E., Tillaev S.U., Ziyadullaev A.E., Abdurahmanov G.

Thermal analysis of materials treated with nitrogen - and phosphorus-containing flame retardants

the results on study of containing nitrogen and phosphorus antipirens on the mechanism of burning of materials on the basis of cellulose and mix of various polymers, with the purpose of their decrease burning.

 

Berdiyeva M.I., Tursunov T.T., Bekmurodova M.G., Rahmatova N.Sh, Nazirova R.A.

Investigation phosphor acidic structure cationite of policondensation type

New phosphoric cation was obtained by phosphorylation of polycondensation products based onvatwastes of Shurtan Gas Chemical Complex andfurfural. The structure, the presence of ionic groups and the degree of dissociation were identified by applying analysis methods such as elementary and IRspectroscopic analysis, alkalimetrical and potentiometrictitration.

 

Gaibnazarov S.B. The study of the viscous properties of polymers used in drilling fluids

Explored physic-chemical characteristic new copolymers got on base GIPAN and lignophosphat, and copolymers with different quaternairing salt. The study velocity features water solution copolymers has shown that they are a typical polyelectrolyte.

 

Daminova Sh.Sh., Kadirova Z.Ch., Khujamberdiev M., Sharipov Kh.T. Nanostructured solid impregnated resin on the basis of styrene-divinylbenzene matrix and P,S-polyfunctional ligands

The correlation of sizes of dialkyldithiophosphoric acids (ethyl-, isopropyl-, isobutyl-) with porous characteristics of styrene-divynylbenzene matrix of solid impregnated resin was carried out by quantumchemical method. Valuable influence has steric factor and the best sorption characteristics have solid impregnated resin on the basis of diisopropyldithiophosphate.

 

Akhrarov B.B., Mukhamedgaliev B.A., Sayfutdinov R.S.

Development a new polymeric fire-retardants for wood

Determined main kinetic and physic-chemical regularities of the process of the formation polymeric fire-retardants, as well as thermal features of the target product. Revealed relationship physic-chemical characteristic polymer with their combustibility and coxing.

 

CHEMICAL-METALLURGICAL PROCESSES

 

Ziyadullaev A.Sh., Kobilova G., Ruzmatov I., Pozilov M.N., Ziyadullaev A.A.

Anodic processing of nonferrous and precious metal alloys in the chloride solution

The rate of anodic dissolution and dependence of current of partial components of the current density Dа for alloys with different Au, Аg and Cu contents have been studied. At high Dа both components of alloy etched with equal rate, whereas at low Dа region of selective dissolution of electronegative components (Аg, Cu) has been observed, a top boundary of which rises with the increasing of Cu contents in the alloy. It has been found, that the partial current of anodic dissolution of copper from alloys appreciably exceeded the rate of dissolution of pure copper at identical conditions

 

Hovsepyan A.O.

Developed technology of pelletizing powder of calcium molybdate and use in the alloying of steel

The possibility of increasing assimilation of molybdenum from calcium molybdate in alloying steel by granulating fine-crystalline powder of calcium molybdate was investigated, as binders bentonite clay was used.

 

PROCESSES, APPARATUS, MODELING

 

Muкhamedbaev A.A., Kamilov H.H., Hasanova M.K., Tulaganov A.A.

Features of grinding electrothermophosphoric slag and its mixtures

The features of the grinding process electrothermophosphoric (ETF) slag in a ball mill. We studied the effect of mineral additives and surface-active agents (surfactants) on the process of grinding ETF slag.

 

Bazarov, B. I., Kalawao S. A., sidiqi, F. sh., Usmanov I. I.

Peculiarities of the use of dimethyl ether as a motor fuel

The expediency of development of new technology for production of DME with the same performance as a diesel fuel viscosity and calorific value, which allows to minimize constructive and adjusting changes in the underlying diesel fuel and reduce operating costs.

 

FOOD TECHNOLOGY AND BIOTECHNOLOGY

 

Fathullayev A., Turabjanov S.M., Rahimjanov M.A., Fathullayev A.A.

Quality characteristics of thermally treated meat systems containing soy concentrates were evaluated

Functional properties of traditional soy concentrate and its analogue were investigated. Then a comparative analysis of functional-technological, structural mechanical properties and quality traits of thermally treated ground meat systems was carried out.

 

Khalilov R.M., Mamatkhanov A.U., Kotenko L.D., Sagdullaev Sh.Sh.

The extraction process of the sum flavonoids of Ammothamnus lehmannii roots

The process of extraction of flavonoids of Ammothamnus lehmannii was investigated. For more complete extraction of the desired product the selective extragent was identified. In order to optimization of production technology extraction kinetics was studied. The different methods of process extraction were studied to intensify and proposed the method of “step wise” was chosen.

 

Norkulova K.T., Safarov J.E. Technical and technology drying rosehips

Proposed vacuum-infrared drying of rose hips, which allows to reduce the duration of the drying process with the maximum preservation of the chemical composition of rose hips.