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Akimkhan A.M.,Bekturov Institute of Chemical Sciences
Russian Journal of Physical Chemistry A

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. Source

Bektenova G.A.,Bekturov Institute of Chemical Sciences
Russian Journal of Physical Chemistry A

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. Source

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

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. Source

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

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. Source

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

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. Source

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