Rustam Tokpayev

Rustam Tokpayev
Al-Farabi Kazakh National University · Center of Physical-chemical Methods of Research and Analysis

PhD

About

18
Publications
1,087
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22
Citations
Introduction
Our research team is engaged in the development of complex technologies for mineral and plant raw materials processing with the aim of obtaining valuable products: concentrates of rare and rare-earth metals, sorbents, biologically active substances, etc. Recently, we have started to practice supercritical CO2-extraction of valuable components from vegetable and mineral raw materials. We would be pleased to cooperate in these areas!

Publications

Publications (18)
Article
This article looks into process of supercritical-CO2 phosphogypsum (PG) conversion, which is production residue after making mineral fertilizers by "Kasphosphate" LLC. Nowadays, over 30 million tons of PG have been accumulated in Kazakhstan; its background radiation is low enough to recycle it into valuables such as construction materials, rare ear...
Article
Full-text available
Nowadays, a strategy for the utilization of secondary resources to obtain valuable components is actual. It will lead to the most rational use of natural resources and environmental protection. Electrochemical methods are perfectly applicable to solve this problem. Electrochemical methods allow concentrating of the target components without prelimi...
Article
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Photosynthesis is considered to be one of the promising areas of cheap and environmentally friendly energy. Photosynthesis involves the process of water oxidation with the formation of molecular oxygen and hydrogen as byproducts. The aim of the present article is to review the energy (light) phase of photosynthesis based on the published X-ray stud...
Article
Highly microporous inexpensive activated carbons have been prepared using a physical activated method based on biomass (corn cobs, grape seeds, birch, and pine cones) and shungite minerals. These materials were investigated as sorbents for CO2 adsorption. Textural characterization of these activated carbons were measured by nitrogen adsorption-deso...
Article
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The processes of extraction of cerium and neodymium from Kazakhstan phosphogypsum, a large-tonnage waste of mineral fertilizer production of "Kazphosphate" LLP, have been studied. The influence of the nature of the leaching agent, temperature and duration of the process on the efficiency of cerium, neodymium leaching using the methods of X-ray fluo...
Article
In the present work, activated carbons from wheat grain production waste (WGPW), modified by 3, 5 and 7 % wt. ammonium nitrate, were obtained by heat treatment in an inert argon atmosphere and subsequent activation with superheated water vapor. The temperature of 750 oС is the optimal temperature of carbonization (pyrolysis) and activation of the W...
Article
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Results on the obtaining and the study of a plant growth stimulator based on 1-propyl-4-(3'-amino-1’,2’,4'-triazolo-3'-thiopropinyl) piperidin-4-ol are presented in the article. 1-propylpiperidin-4-on and 3-mercaptopropinyl-5-amin- 1,2,4- triazolo were obtained with the basic parameters of the synthesis for synthesizing of 1-propyl-4-(3'-amino-1',...
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Thermal destruction of wheat grain processing wastes (WGPW) and the obtained products structure formation depending on the temperature of the carbonization process were studied. It is shown that the structural transformations of the wheat grain processing waste (bran) during the thermal treatment in the studied interval proceed through the stage of...
Article
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The thermal destruction of wheat grain’s processing wastes from Almaty and South Kazakhstan regions was studieв. The structure of the products obtained depending on the temperature of the carbonization process was formed, and the basic physico-chemical characteristics of the obtained carbon material based on the WGPW were studied using thermogravim...
Article
Active carbons were synthesized from a furfural copolymer using a polyester resin as an activator. The influence of the temperature of the thermal treatment of the carbon sorbents on the weights and ash contents of the obtained materials was established. The molecular structures of the carbons were studied by NMR spectroscopy.
Article
Full-text available
Electrode materials were prepared from activated carbonizates of walnut shell, apricot pits and shungite rock from “Bakyrchik” deposit, East Kazakhstan. Physicochemical characteristics of the obtained samples were studied by the Brunauer-Emett-Taylor method, scanning electron microscopy, Raman spectroscopy and other methods. Electrochemical propert...
Article
Full-text available
The authors’ list K. K. Kishibaev, R. R. Tokpaev, A. A. Atchabarova, S. A. Efremov, N. L. Voropaeva, María José Fernández-Sanjurjo, S. V. Nechipurenko, M. K. Nauryzbaev, Kh. S. Tasibekov, and V. V. Karpachev should be replaced by K. K. Kishibayev, R. R. Tokpayev, A. A. Atchabarova, S. A. Efremov, N. L. Voropaeva María José Fernández-Sanjurjo, S. V....
Article
This paper dwells upon the physical and chemical properties of activated carbons based on compressed plant materials (coconut shell) and on furfural copolymers, the paper also gives the results of their elemental analysis by ICP-MS method, the structure and morphology of the obtained sorbents have been determined by scanning electron microscopy. Th...
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Full-text available
Morphology and structure of activated carbons produced from a wide variety of carbon-containing vegetable and mineral raw materials were studied and their physicochemical characteristics were determined. The sorption of gold from industrial solutions with various pH values with activated carbons based on birch wood, coconut shells, and even shungit...
Chapter
The chemical composition of shungite from “Bolshevik” deposit was studied by energy-element analysis. It was established by X-ray diffraction method that in addition to the carbon component of shungite has a mineral part: hydromica type of illite, gidromuskovit, quartz, dolomite, chlorite, pyrite and siderite. Enrichment by flotation of shungite wa...
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In this paper, new carbon containing materials based on products of shungite ore enrichment and carbonizates of plant raw materials were studied. The phase transformations occurring during the carbonization process were studied. Scanning electron microscopy (SEM) was used to visualize the surface topography. It was established that supports based o...
Article
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Activated carbons are widely used in different industries for cleaning a variety of natural objects from of technogenic pollutants. In the article presents the results of physico-chemical investigations of activated carbons. The investigations on the sorption of gold in cyanide solutions activated sorbent based on furfural and sorbent based on shun...
Article
Full-text available
The method of chemical enrichment was obtained carbon concentrate (C = 40% wt.) on the base of shungit breeds, which serves as carrier of rhodium-carbon catalysts. It is established that due to the high carbon content is the best connection affinity Rh-C. Rhodium-carbon catalysts were studied by electron microscopy and X-ray fluorescence analysis.

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