Kubitska I. Fundamentals of acrylic acid production technology by condensation reactions

The dissertation is devoted to the development of the technology for acrylic acid production basics by condensation of acetic acid and formaldehyde (methanol) in the gas phase on solid multicomponent catalysts, which allows producing acrylic acid with high yield and selectivity. The new effective catalytic systems for the process of acrylic acid production by condensation of acetic acid with formaldehyde based on mixtures of boron, phosphorus, vanadium, molybdenum and tungsten oxides were developed. It has been determined that the B2O3–P2O5–V2O5–WO3/SiO2 catalyst. It was established that hydrothermal treatment of the silica gel support of B2O3–P2O5–V2O5–WO3/SiO2 catalyst allows to regulate its physical-chemical and catalytic properties in wide range. The efficiency of the best developed catalytic systems in the process of oxidative condensation of acetic acid with methanol has been established. The physical and chemical properties of the developed catalysts and their effect on the activity and selectivity of catalysts in condensation reactions have been determined. Based on the theoretical and experimental research, the basics of the technology for the production of acrylic acid and methyl acrylate has been developed, and the principal technological scheme.