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Submit scientific paper, scientific publications, International Research Journal | Meždunarodnyj naučno-issledovatel’skij žurnal

ISSN 2227-6017 (ONLINE), ISSN 2303-9868 (PRINT), DOI: 10.18454/IRJ.2227-6017
ПИ № ФС 77 - 51217

CHEMICAL REACTION AS REALIZATION OF CHEMICAL MOTION FORM: HISTORICAL CONTEXT PROBLEMS

Posted in 2017, CHEMISTRY, Issue № 2(56) February 2017 | 0 comments

During the time the representation of chemical reaction as realization of chemical form of motion of matter was seriously suffered by the transformation of representations of atoms and molecules. Refusing the pure speculation and turning to the experimental observations, the scientists have received a conclusion, that a chemical form of motion properly is an electronic interaction of atoms and molecules. This interpretation makes it possible to explain the mechanism of a chemical reaction, to demonstrate the kinetics of chemical process and self-organization of macromolecules, to plan the complex organic synthesis, to carry out the quantum-chemical calculations. So, modern chemistry in the practical part purchased from hi-tech character.

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EFFECTIVENESS OF METHYLDIETHANOLAMINE THROUGH AMINE GAS PURFICATION

Posted in 2017, CHEMISTRY, Issue № 2(56) February 2017 | 0 comments

Amine gas cleaning has been widely used in the oil and gas industry. Traditionally, aqueous solutions of monoethanolamine are used for the treatment of diesel fuel from the hydrogen sulfide, carbon dioxide and mercaptans. The process is based on the chemisorption of acid gas components by aqueous amine solution and on its further regeneration. Process optimization is possible through the use of methyldiethanolamine and depends on the real technological problem.
In this paper the technological features and benefits of methyldiethanolamine (MDEA) in the diesel fuel hydro treatment are studied. The studies were hold at the company “LUKOIL -Volgogradneftepererabotka”.

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INVESTIGATION OF ACID AND CATALYTIC PROPERTIES OF MODIFIED WITH LANTHANUM OXIDE MFI-TYPE ZEOLITES IN THE PROCESS OF HIGH-OCTANE GASOLINE GENERATION

Posted in 2017, CHEMISTRY, Issue № 2(56) February 2017 | 0 comments

In present article the influence of lanthanum oxide promoting additives concentration on acid and catalytic properties of high-silica MFI-type zeolite in the process of conversion of straight-run gasoline fractions of gas condensate into high octane components of motor fuels is investigated. It was shown that introduction of lanthanum oxide promoting additives into zeolite increases its acid properties and catalytic activity. The maximal effect is reached by introduction 3 wt.% of lanthanum oxide into high-silica MFI-type zeolite.

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BEHAVIOR OF SINGLE DROPLETS IN LIQUID EXTRACTION SYSTEMS

Posted in 2017, CHEMISTRY, Issue № 2(56) February 2017 | 0 comments

The knowledge of drop rates has a big impotence to compute different processes of chemical technology, in particular, extraction processes. In industry extraction system is the complex polidisperse system. The first step to know these systems is to consider the behavior of a single drop. An experimental study of drop rise velocities was carried out in the system butyl acetate / water and benzene / water. A large effort has been made to prevent the system from contaminations. Typical regimes of droplet movement were shown in dependence of drop sizes. Correlations from the literature show excellent agreement with experiments.

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EFFECTS OF CUT-OUT ION VOLUME AND OVERSCREENING OF DIELECTRIC FUNCTION OF THE SOLVENT IN THE NONLOCAL ELECTROSTATICS SOLVATION THEORY

Posted in 2016, CHEMISTRY, Issue November 2016 | 0 comments

The article considers the development of nonlocal electrostatic theory of ion solvation in the case when taken into account the effect of cut-out the ion volume from solvent and the overscreening of dielectric function of solvent. The calculated energy of ion solvation in this model is compared with the calculation on theory (J. Chem. Phys., 1996), which does not take into account this effect. The theory developed explains the difference in solvation energies of alkali metal cations and anions of halogens of the same radius.

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THE SYNTHESIS OF NEW ORGANOSELENIUM COMPOUNDS BASED ON CATECHOL AND SELENIUM

Posted in 2017, CHEMISTRY, Issue № 1(55) January 2017 | 0 comments

Convenient method for preparation of 2-(allyloxy)phenol from catechol and allylbromide permitting to obtain the product in high purity has been developed. The reaction of selenium dibromide with 2-(allyloxy)phenol leading to the formation of linear Markovnikov product, bis[2-bromo-3-(2-hydroxyphenoxy)propyl]selenide in 97% yield has been studied. The action of a base (K2CO3) on this compound led to a number of products including the target compound bis(2,3-dihydro-1,4-benzodioxin-2-ylmethyl)selenide – the result of intramolecular substitution with the formation of two 2,3-dihydro-1,4-benzodioxine cycles. The major product is 2-(allyloxy)phenol as a result of elimination of selenium dibromide from bis[2-bromo-3-(2-hydroxyphenoxy)propyl]selenide.

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