ACRYLIC ACID OBTAINING BY ACETIC ACID CATALYTIC CONDENSATION WITH FORMALDEHYDE.

Acrylic acid is a bulk product of organic synthesis. Propylene oxidation is main industrial method of its production. Considering substantial costs for oil-derived raw material (propylene), development of alternative acrylic acid production methods are very important. The method of acrylic acid production by acetic acid gas-phase aldol condensation with formaldehyde has fair implementation prospects. In industry formaldehyde and acetic acid are synthesized from methanol produced from synthesis gas, and a feedstock for synthesis gas obtaining is methane or coal. Thus the method allows using non-oil-derived raw materials. The present work is dedicated to the development of efficient catalysts of gas phase aldol condensation of carbonyl compounds. Using of the developed B₂O₃-P₂O₅-WO₃/SiO₂ catalyst allows acrylic acid obtaining with high yield. Temperature and contact time effect on the initial reactants conversion and the target product formation selectivity have been studied in the work. Optimal conditions of the condensation process have been determined. The research results implementation would enable diversifying the raw materials base of acrylic monomers production and allow. [ABSTRACT FROM AUTHOR]