Entity

Time filter

Source Type


Rozanov V.N.,Sintez Research and Engineering Center | Treger Yu.A.,Sintez Research and Engineering Center
Kinetics and Catalysis | Year: 2010

Based on information concerning the rate constants of elementary steps corrected with consideration for experimental data obtained under laboratory, pilot-plant, and industrial conditions, the kinetics of the gas-phase process of thermal chlorination of methane was considered. The form of the rate equation of the process depends on the mode of chain termination. Of four possible variants, cross termination with the participation of a chlorine atom and a hydrocarbon radical and quadratic-law termination on hydrocarbon radicals are significant under industrial conditions. The fractions of the participation of either of these variants at various degrees of chlorine conversion were determined. Rate equations were found to describe the chlorination of methane, methyl chloride, methylene chloride, and chloroform with cross and quadratic-law chain terminations. The overall kinetic order of these equations with respect to reactants was 1.5. Combined equations that imply the simultaneous occurrence of cross and quadratic-law chain terminations were proposed. © 2010 Pleiades Publishing, Ltd. Source


Rozanov V.N.,Sintez Research and Engineering Center | Treger Yu.A.,Sintez Research and Engineering Center
Kinetics and Catalysis | Year: 2014

The kinetics of the catalytic decomposition of dichloromethane and trichloromethane in a single row plug flow reactor at 400-500°C has been studied. Dichloromethane decomposes into carbon and hydrogen chloride (presumably via the intermediate formation of monochlorocarbene). Trichloromethane decomposes mainly into carbon, hydrogen chloride and tetrachloromethane (presumably via the intermediate formation of dichlorocarbene). © 2014 Pleiades Publishing, Ltd. Source


Treger Yu.A.,Sintez Research and Engineering Center | Flid M.R.,Sintez Research and Engineering Center
Catalysis in Industry | Year: 2011

The major scientific and technological aspects of some large-scale organochlorine synthesis processes operating in Russia are considered. An analysis of organochlorine products production and its development prospects is presented. It is shown that vinyl chloride as an intermediate in the production of polyvinyl chloride is now in highest demand among the organochlorine products and this situation will persist in the medium-term future. Development of the production of the other organochlorine products is unlikely in view of their high cost and high power consumption. Some progress in obtaining organochlorine products, such as intermediates in lower olefins synthesis, can be expected from the development of gas-phase processes. © 2011 Pleiades Publishing, Ltd. Source


Rozanov V.N.,Sintez Research and Engineering Center | Treger Yu.A.,Sintez Research and Engineering Center
Kinetics and Catalysis | Year: 2011

The kinetics of the liquid-phase noncatalytic hydrochlorination of methanol in hydrochloric acid is reported. The methyl chloride formation rate depends on the methanol concentration in hydrochloric acid and on the partial pressure of hydrogen chloride over hydrochloric acid. The activation energy of the reaction is 113 kJ/mol. The rate of the side process of dimethyl ether evolution is directly proportional to the methanol concentration and is inversely proportional to the partial pressure of hydrogen chloride over hydrochloric acid. The activation energy of the side reaction is about 33 kJ/mol. The results of the industrial implementation of methyl chloride synthesis from methanol and hydrochloric acid are in satisfactory agreement with the laboratory data. © 2011 Pleiades Publishing, Ltd. Source


Kartashov L.M.,Sintez Research and Engineering Center | Rozanov V.N.,Sintez Research and Engineering Center | Treger Y.A.,Sintez Research and Engineering Center | Flid M.R.,Sintez Research and Engineering Center | And 2 more authors.
Catalysis in Industry | Year: 2010

The gas phase (200-400°C) catalytic hydrodechlorination (HDC) of the main waste components (CH2Cl2, CH3Cl, CCl 4) obtained in the production of methyl chloride from methane was studied with the aim of utilizing them in the development of promising technology for the synthesis of light olefins from methane via the pyrolysis of methyl chloride. Laboratory investigations were conducted on industrial hydrogenation and hydrotreating catalysts. Three catalytic systems and the conditions ensuring the stable operational characteristics of the HDC process were chosen. Methane, methyl chloride, light olefins, and HCl are the main products of this process. The use of Ni-Mo/Al2O3 catalyst leads to an increase in the CH3Cl and olefin concentrations in the products. All the products of the HDC process can be used in the production of olefins to create a wasteless and chlorine-balanced technology for the synthesis of olefins from natural gas (methane). Owing to their considerable waste volumes, the technology for the synthesis of olefins cannot be realized without the HDC stage. © 2010 Pleiades Publishing, Ltd. Source

Discover hidden collaborations