A. V. Ovcharova

Kinetics of allyl chloride epoxidation with hydrogen peroxide catalyzed by extruded titanium silicalite

A mechanism is suggested for the heterogeneous catalytic epoxidation of allyl chloride with hydrogen peroxide in methanol. The kinetics of allyl chloride oxidation into epichlorohydrin in the presence of extruded titanium silicalite has been investigated. A kinetic model of the process has been derived from experimental data, and the activation energies of the target and side reactions, the rate constants of the reactions, and the adsorption equilibrium constant have been determined. The allyl chloride epoxidation process has been tested using a bench-scale continuous apparatus, and the adequacy of the kinetic model has been estimated.

Modeling of the vapor-liquid equilibrium in the system formed by the epichlorohydrin synthesis products

The parameters of the NRTL and UNIQUAC models have been estimated for the system formed by epichlorohydrin synthesis products. Mathematical modeling of the vapor-liquid equilibrium in two- and three-component systems at atmospheric pressure has been carried out.

Kinetics of allyl chloride epoxidation with hydrogen peroxide

The kinetics of allyl chloride oxidation to epichlorohydrin in the presence of titanium-containing zeolite was studied. The influence of the concentrations of the initial substances, reaction products, and temperature on the rate of the process was considered. The mathematical model of the process was constructed on the basis of the experimental data obtained. The rate constants, adsorption equilibrium constants, and activation energies of the reactions were calculated.

Regularities of glycidol synthesis by the liquid-phase epoxidation of allyl alcohol with hydrogen peroxide

The main features of the liquid-phase epoxidation of allyl alcohol by hydrogen peroxide in an organic solvent in the presence of the titanium-containing zeolite in the batch reactor were studied. The influence of the amount of the solvent, ratio of reactants, and temperature on the rate of glycidol synthesis was revealed.

A Kinetic Model for the Epoxidation of Allyl Alcohol with Hydrogen Peroxide on Titanium Silicate TS-1

The kinetic regularities of the oxidation of allyl alcohol into glycidol in the presence of titanium silicate are studied at varied initial concentrations of the reagents, products, and temperature. The probable mechanism is used as the basis to develop a substantial kinetic model, which adequately describes the obtained experimental data.

The study of epoxidation of allyl chloride in methanol in the presence of extruded titanium containing silicalite

The liquid-phase epoxidation of allyl chloride in methanol with aqueous solution of hydrogen peroxide was conducted in the presence of extruded titanium containing silicalite and the physico-chemical features of the process were investigated. The effect of the amount of solvent, the initial ratio of the allyl chloride to hydrogen peroxide and the temperature of the process on the yield of the target product (epichlorohydrin) and by-products (3-chloro-1,2-propanediol and 3-chloro-1-methoxypropanol-2) was studied. Based on the obtained results, the optimum conditions of synthesis of epichlorohydrin for a laboratory scale continuous setup were recommended.

Study of alkene epoxidation in the presence of extruded silicalite titanium

Main features of liquid-phase epoxidation of propylene, allyl chloride, and allyl alcohol by aqueous solution of hydrogen peroxide in the presence of extruded titanium silicalite in methanol medium have been investigated. The effects of the solvent, the initial ratio of the organic substrate: hydrogen peroxide, and temperature on the yield of main products and by-products were elucidated. Based on the obtained features the conditions for the synthesis of propylene oxide, epichlorohydrin, and glycidol in a laboratory continuous set-up were established.

Kinetics of propylene epoxidation with hydrogen peroxide catalyzed by extruded titanium silicalite in methanol

The kinetics of propylene oxidation into propylene oxide in the presence of extruded titanium silicalite was studied. Based on the experimental data, a kinetic model of the process was designed and the activation energies of the target and side reactions, the rate constants, and the adsorption equilibrium constants were determined. The adequacy of the proposed kinetic model was verified on a continuously-operated test bench laboratory unit.

Studying the effect of process parameters on the epoxidation of propylene in a methanol medium in the presence of extruded titanium silicate

Quantitative data on the effect of process parameters on the main features of the liquid-phase epoxidation of propylene with an aqueous solution of hydrogen peroxide in the presence of extruded titanium silicate in a methanol medium are obtained. The effect of the solvent concentration (13.7–19.1 mol/L), the initial propylene: hydrogen peroxide ratio ((2–5) : 1), and the temperature (30–60°C) on the yield of the target product (propylene oxide) and such byproducts as 1,2-propyleneglycol, 1-methoxy-2-propanol, and 2-methoxy-1-propanol, is studied. The observed characteristics are used as a basis for recommendations concerning the conditions of propylene oxide synthesis in a continuous laboratory setup.

Vapor–liquid equilibrium in the system of propylene oxide synthesis products

Vapor–liquid equilibrium data calculated for the systems formed by propylene oxide synthesis products have been compared to the same data available from the literature. Using the NRTL and UNIQUAC models, the vapor–liquid equilibrium data available from the literature for the systems have been optimized, the model parameters and their errors have been estimated, and the corresponding diagrams have been calculated and mapped. A process flowsheet for propylene oxide isolation from the reaction mixture is suggested.