Nebesnyi R. Scientific basis and technology of catalytic synthesis of unsaturated carboxylic acids and esters

The thesis is devoted to the development of scientific basis and technology of catalytic production of unsaturated carboxylic acids and their esters by the reactions of aldol condensation, oxidative condensation and oxidation. Effective complex oxide and phosphate catalysts have been developed and modified additionally by means of hydrothermal methods: microwave, mechanochemical and hydrothermal treatment. The regularities of the effect of hydrothermal methods of the catalysts modification for the condensation processes of saturated carboxylic acids with formaldehyde have been investigated and the connection: catalyst synthesis parameters → physicochemical properties of the catalyst → catalytic properties of the catalyst in the condensation reactions have been established. Heterogenized Se-containing microgel catalytic systems based on microgels (polyvinylcaprolactam) have been developed and characterized, with a developed 3D-branched structure, which is easily penetrated by reagents, which allows the oxidation reactions of unsaturated aldehydes to occur not only on the outer surface of the polymer catalyst but in the bulk of it too. The effect of technological parameters on the processes of synthesis of acrylic acid, methyl acrylate and their homologues is established; the basic technological schemes of production of acrylic acid and methyl acrylate by condensation and oxidation reactions on the developed catalysts are offered. The pilot tests of the best catalytic systems, their comparison with each other and comparison of the developed technologies with industrial analogues are performed.