CHEMICAL TECHNOLOGY (inorganic and organic substances. Theoretical fundamentals)

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SYNTHESIS OF 3-TERT-BUTYL-9-R-PYRIMIDO[4,5:3,4]PYRAZOLO[5,1-C][1,2,4]TRIAZINE-4(6H),11(10H)- DIONES AT CONDITIONS ...

SYNTHESIS OF 3-TERT-BUTYL-9-R-PYRIMIDO[4,5:3,4]PYRAZOLO[5,1-C][1,2,4]TRIAZINE-4(6H),11(10H)- DIONES AT CONDITIONS OF MICROWAVE RADIATION

3-tert-butyl-9-R-pyrimido[4’,5’:3,4]pyrazolo[5,1-c][1,2,4]triazine-4(6H),11(10H)-diones was synthesized at the conditions of microwave radiation. The reaction kinetic charac-teristics were obtained under conditions of thermal and microwave heating.

Key words: pyrazolo[5,1-c][1,2,4]triazine, acylation, microwave synthesis

2016, Т. 59, № 3, Стр. 74-77

VAPOR GASIFICATION OF LOW QUALITY SOLID FUEL OF TVER REGION

In article the results of study of vapor gasification of peat, brown coal and wood raw materials of Tver region are given for obtaining the gas enriched with hydrogen. Elemental composition of materials under study as well as the gas being formed and ash was presented. Ratio between hydrogen and carbon monoxide in formed synthesis gas allowes to make con-clusion on his possible application in Fisher-Tropsch proceses or for methanol synthesis.

Key words: synthesis gas, hydrogen, gasification

2016, Т. 59, № 3, Стр. 69-73

COMPOSITION AND PROPERTIES OF CAPROLACTAM OLIGOMERS OBTAINED FROM EXTRACTION WATER DIRECTED TO REGENERATION

The analysis results of the extraction water forming at various steps of the solutions concentration in a process of its regeneration at the production of PA-6 at JSC “Kuibyshe-vAzot” allowed to recommend such compositions of reaction mixtures, directed to polymeri-zation, the content in which of OL corresponds to their equilibrium values in a polymer and to reduce the temperature of carrying out of concentrating the extraction water using an en-vironmentally safe heat carrier that is superheated steam.

Key words: caprolactam, oligomers, polyamide-6, extraction water, regeneration, homogeniza-tion temperature, segregation temperature

2016, Т. 59, № 3, Стр. 65-68

BEHAVIOR OF BLOCKING (INERT) ELECTRODE / SOLID ELECTROLYTE INTERFACE IN GALVANOGARMONIC CHARGING MODE. ...

BEHAVIOR OF BLOCKING (INERT) ELECTRODE / SOLID ELECTROLYTE INTERFACE
IN GALVANOGARMONIC CHARGING MODE. CASE OF DECELERATED DIFFUSION
AND ADSORPTION –DESORPTION OF TWO DIFFERENT KINDS OF PARTICLES

Electrochemical behavior of a cell with an interface of blocking electrode /solid elec-trolyte was studied in galvanogarmonic mode of charge. The possibility of application of simple and more graphic calculation technique and separation of electrochemical impedance schemes into active and reactive constituents was shown. The Jacobsen-West diffusion model was used as an equivalent electric circuit, which is valid for relatively large times or low AC frequencies. The plotting of dependences of active and reactive impedance components on AC frequency was used in order to estimate the values of parameters for studied equivalent electric circuits.

Key words: operational impedance, solid electrolyte, equivalent electric circuit, blocking elec-trode

2016, Т. 59, № 3, Стр. 59-64

ELECTROCHEMICAL PROPERTIES OF THERMALLY EXPANDED GRAPHITES AND OXIDIZED GRAPHITES MODIFIED WITH TRANSITION METAL SALTS

The data were presented on study by electrochemical properties (the redox potential, the effective number of electrons, half-wave potential, current density) of thermally expanded graphite and oxidized graphite modified with metal salts (Fe2+, Co2+, Ni2+, Cu2+, Zn2+) in al-kaline environment.

Key words: cyclic voltammetry, thermally expanded graphite, oxidized graphite, alkaline envi-ronment

2016, Т. 59, № 3, Стр. 55-58

MAIN NITROGEN CONTAINING FERTILIZERS AND TECHNICAL SOLUTIONS FOR IMPROVING THEIR QUALITY

The analysis of requirements changing to parameters of quality of granulated nitro-gen-containing mineral fertilizers connected with agro technology, economic and ecological factors was carried out. Engineering solutions of fast and efficient achievement of desired results were proposed which take into account the created production reality. These solutions were checked practically.

Key words: granulation, ammonium nitrate, urea, disc granulators, granulation columns

2016, Т. 59, № 3, Стр. 49-54

INFLUENCE OF CALCIUM AND COPPER FERRITES ON ACTIVITY AND SELECTIVITY OF MEDIUM-TEMPERATURE CO CONVERSION CATALYSTS

Process of mechanochemical synthesis of calcium and copper ferrites was studied by X-ray and XRD analysis, thermogravimetry, IR spectroscopy and gas chromatography methods. Their high catalytic activity in reaction of carbon monoxide medium-temperature conversion by water vapour was shown. The composition of byproducts in the reaction of CO conversion and the concentration of impurities in condensate was calculated. The rheological properties of calcium and copper ferrites, as well as a catalyst on their basis, were studied.

Key words: calcium ferrite, copper ferrite, activity, selectivity, catalyst, carbon monoxide con-version

2016, Т. 59, № 3, Стр. 43-48

CHRONOLOGY OF DEVELOPMENT AND APPLICATION OF ENHANCED OIL RECOVERY METHODS ON EXAMPLE OF DEPOSITS OF REPUBLIC OF BASHKORTOSTAN

In this paper the evolution of the methods of oil production intensification and enhanced oil recovery (EOR) in the USSR and the Russian Federation is considered. By authors were identified and described the historical stages of development of the secondary and tertiary EOR fields on the example of the Republic of Bashkortostan with the indication of major events that have had a significant impact on the technology development of deposits in the country.

Key words: EOR, Arlanskoe mine, oil recovery

2016, Т. 59, № 4, Стр. 88-93

INFLUENCE OF THERMAL DIFFUSION ON KINETICS OF OSCILLATING IR DRYING

The relative thermal diffusion coefficient δt was calculated from the obtained moisture sorption isotherm for the seeds of onions. It allowed estimating the contribution of thermal diffusion with respect to the flow of mass conductivity in the considered version of the oscillating IR drying, and it turned out to be 5%. Hence, the thermal diffusion can be ignored for engineering calculations of the kinetics of the oscillating IR drying.

Key words: infrared drying, seeds, sorption isotherm, thermal diffusion, mass conductivity

2016, Т. 59, № 4, Стр. 83-87
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