Galstyan A. Study of selective oxidation reactions of arenes by the ozone-air mixture in the liquid phase

The object of study - liquid phase oxidation reaction of arenes with ozone. The aim is to develop the theoretical foundations of management depth and selectivity of liquid-phase oxidation of arenes ozone. Study of the reactivity of ozone with respect to the number of methylbenzene. The study of kinetics and mechanism of the reactions of liquid-phase catalytic ozonation arenes. Development of the catalyst systems for the selective synthesis of the corresponding oxygen-containing aromatics. Methods of research - the kinetics of absorption of ozone in the oxidation reactions were studied by spectrophotometer. The reaction products were examined by GLC, IR, NMR. Quantitative determination of methylbenzenes and their transformation products in solution was monitored by GLC. The thesis is devoted to developing the theoretical foundations of selective processes of oxygenate aromatic products: benzyl alcohol, benzaldehydes, benzoic acids and quinines, liquid-phase oxidation of the corresponding methylbenzenes with ozone-containing gases. Novel catalyst systems based on transition metal compounds. Introduction of manganese (II) acetate to Aс2O-O3-H2SO4-ArCH3 leads ozonation reaction methylbenzenes toward oxidation by methyl groups to form predominantly aromatic alcohols. When oxidation stronger manganese bromide, catalyst can stop the reaction at the stage of formation of aromatic aldehydes. When administered methylbenzenes ozone oxidation in acetic acid in the presence of cobalt (II) acetate or a mixture of potassium bromide at elevated temperatures, the conditions for obtaining relevant preferential benzoic acid. Based on the results obtained the optimal conditions of acidification of methylbenzenes with ozone have been established. The principal flow sheet synthesis of aromatic oxygenate products has been proposed. The results received can be used as a base for developing perspective oxidation technologies.