Bekturov Institute of Chemical Sciences

Almaty, Kazakhstan

Bekturov Institute of Chemical Sciences

Almaty, Kazakhstan
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Kadirbekov K.,LLP Kazatomprom Sorbent | Kadirbekov K.,Bekturov Institute of Chemical Sciences | Zhambakin D.,LLP Kazatomprom Sorbent | Kadirbekov A.,LLP Kazatomprom Sorbent | And 2 more authors.
MATEC Web of Conferences | Year: 2017

The paper studies the influence of the nature of modifying acids (mineral, organic and heteropolyacids), and their combination on the composition and structure of the iron oxide rich clinoptilolit from Shankanay field in Kazakhstan for creation of selective catalysts in hydracarbon processing and sorbents for extracting ions of lanthanide and actinide elements. It is shown that sequential processing of natural zeolite in optimal conditions, by hydrochloric and sulfosalicylic acids lead to intensive decationization and dealumination, as well as maximum removal of iron ions from the zeolite framework without destroying it. It is found that the combination of activated clinoptilolite with hydrochloric acid and phosphotungstic heteropolyacid contributes to obtain catalyst system with high surface area and acidity. © The Authors, published by EDP Sciences, 2017.

Kovrigina T.V.,Bekturov Institute of Chemical Sciences | Chalov T.K.,Bekturov Institute of Chemical Sciences | Ergozhin E.E.,Bekturov Institute of Chemical Sciences
International Journal of Chemical Sciences | Year: 2016

Interpolymer and heterogeneous membranes have been synthesized and pilot tests of the designed electrodialysis and reverse osmosis units for the treatment of waste waters of Pavlodar Petrochemical Plant LLP have been carried out. A hybrid process flowsheet for industrial waste water treatment has been developed and a comparative efficiency analysis of the electrodialysis and reverse osmosis processes by the depth of treatment and demineralization has been performed.

Sultanbayeva G.Sh.,Bekturov Institute of Chemical Sciences | Holze R.,TU Chemnitz | Chernyakova R.M.,Bekturov Institute of Chemical Sciences | Jussipbekov U.Z.,Bekturov Institute of Chemical Sciences
Microporous and Mesoporous Materials | Year: 2013

Results of studies of the sorption activity of pristine and activated (with Na2CO3 solution) zeolite and a composite based on zeolite and bentonite with respect to Fe2+, Cu2+, Al 3+, Pb2+ are presented. The influence of zeolite particle size, activation, and its duration on the degree of sorption of heavy metal ions from phosphoric acid is reported. The activation of zeolite by sodium carbonate solution increases its sorption capacity for these ions substantially. The highest degrees of acid purification were achieved in the first 5 min of the process with removal of 60.2% for Fe, 95.4% for Al, 99.0% for Pb and 96.6% for Cu of the initial concentrations. © 2012 Elsevier Inc. All rights reserved.

Usmanov S.,Bekturov Institute of Chemical Sciences | Toipasova U.M.,Bekturov Institute of Chemical Sciences | Omarova G.T.,Bekturov Institute of Chemical Sciences | Tolkyn B.,Bekturov Institute of Chemical Sciences | Kozybakova E.B.,Bekturov Institute of Chemical Sciences
Russian Journal of Inorganic Chemistry | Year: 2014

Processes occurring in the ternary water-salt system containing monomethylolurea and sodium bicarbonate are studied using physicochemical (visual polythermal and isothermal) methods. The germinability and the energy of germination of cotton plant seeds in saline soils is shown to increase due to chemical binding of sodium bicarbonate with monomethylolurea. © 2014 Pleiades Publishing, Ltd.

Vizer S.A.,Bekturov Institute of Chemical Sciences | Sycheva E.S.,Bekturov Institute of Chemical Sciences | Al Quntar A.A.A.,Al-Quds University | Kurmankulov N.B.,Bekturov Institute of Chemical Sciences | And 2 more authors.
Chemical Reviews | Year: 2015

Researchers describe the synthetic methods and properties of mono- and dipropargyl sulfides. They provide information about the synthesis and reactions of aromatic propargyl sulfides. The synthesis of propargyl phenyl sulfides is achieved through C-S bond formation by addition of propargyl halides to sodium benzenethiolate in ethanol, which is usually accompanied by prototropic rearrangements. The synthesis of a variety of aromatic propargyl sulfides in sufficiently high yields with little or no isomerization of propargyl substituents is presented. The synthesis of propargyl-type Sulfides is investigated under conditions that enabled the formation of the desired products in quantitative yield after the development of catalytic methods for carbon-carbon and carbon-heteroatom bond formation using transition-metal complexes.

Vorobyev P.B.,Bekturov Institute of Chemical Sciences | Saurambaeva L.I.,Bekturov Institute of Chemical Sciences | Mikhailovskaya T.P.,Bekturov Institute of Chemical Sciences
Russian Journal of General Chemistry | Year: 2013

The partial oxidation of 3- and 4-methylpyridines on V2O 5 and vanadium oxide catalysts doped with TiO2, Al 2O3, and ZrO2 was studied. The catalytic activities of the studied catalysts were correlated with the calculated proton affinities of the vanadyl oxygen. A possible mechanism of the surface stages of the partial oxidation of 3- and 4-methylpyridines on the vanadium oxide catalysts was discussed. © 2013 Pleiades Publishing, Ltd.

Akimkhan A.M.,Bekturov Institute of Chemical Sciences
Russian Journal of Physical Chemistry A | Year: 2013

The effect of process duration, temperature, and concentration on the adsorption of polyacrylic acid and polyacrylamide by montmorillonite is studied. It is shown that the pattern of interaction of the studied polyelectrolytes with the sorbent surface is determined by the nature of the polymers, the prevalence of acid-base sites, and the pore structure of the mineral. © 2013 Pleiades Publishing, Ltd.

Bektenova G.A.,Bekturov Institute of Chemical Sciences
Russian Journal of Physical Chemistry A | Year: 2010

Ionization constants of a number of boronic acids were determined spectrophotometrically in aqueous solutions. The effect of different substituents on their acid properties is considered. The strongest acids are shown to be phenylboronic acid derivatives containing a nitro group. A model study of the interaction between boronic acids and polyvinyl alcohol depending on pH is analyzed to reveal the optimum conditions for the formation of a stable boronate-diol complex. © Pleiades Publishing, Ltd., 2010.

Mukanova M.S.,Bekturov Institute of Chemical Sciences | Yerzhanov K.B.,Bekturov Institute of Chemical Sciences
Russian Chemical Bulletin | Year: 2014

New mono- and diacetylenic alcohols and glycols of tetrahydrothiopyran family were synthesized. Steric structures of the individual stereoisomers of these alcohols and glycols were established based on the 1H and 13C NMR spectroscopic data. Stereochemistry of ethynylation of 2,5-dimethyltetrahydrothiopyran-4-one was studied. © 2014 Springer Science+Business Media, Inc.

Vorobyev P.B.,Bekturov Institute of Chemical Sciences | Serebryanskaya A.P.,Bekturov Institute of Chemical Sciences
Russian Journal of General Chemistry | Year: 2012

Oxidative ammonolysis of 3(4)-methyl- and 3,4-dimethylpyridines using vanadium oxide catalyst doped with Cr2O3, SnO2, and ZrO2 was studied. The yields of nitriles and conversion of the starting compounds were found to depend on the CH-acidity of the latter in the gas phase. The possible mechanisms of the formation of pyridine-3,4-dicarboxylic acid imide at the oxidative ammonolysis of 3,4-dimethylpyridine was discussed. The relation between the activity of the modified catalysts and the proton affinity of the vanadyl oxygen calculated by the extended Hückel method was established. © 2012 Pleiades Publishing, Ltd.

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