Homogeneous catalytic oxidation of propene to acetone and butene-1 to butanone in the presence of palladium and molybdovanadophosphoric heteropoly acid

Oxidation of propene to acetone and butene-1 to butanone in aqueous solutions was studied in the presence of homogeneous catalysts Pd + HPA-x (HPA-x = H3+xPVxMo12−xO40 having Keggin composition, x = 1–4). The reaction order with respect to alkenes is 1, to palladium is 0.5 for propene and 0.66 for butene-1, respectively. The rate of alkene oxidation does not depend on concentration of HPA-x and acidity of catalyst solution. Alkenes are also successfully oxidized in the presence of new catalysts Pd + HPA-x′ containing modified high-vanadium non-Keggin HPA-x′ (x′ > 4). The HPA-x′ solutions have improved thermal stability and are very promising for oxidation of the lower alkenes. Kinetic peculiarities of oxidation of both alkenes in the presence of solutions of HPA-x′ and HPA-x are similar.

Oxidation of propene to acetone and butene-1 to butanone in aqueous solutions was studied in the presence of homogeneous catalysts Pd + HPA-x (HPA-x = H3+xPVxMo12−xO40 having Keggin composition, x = 1 − 4). The selectivity of oxidation of propene is >99%, and butene-1 is >98%. Alkenes are also successfully oxidized in the presence of solutions of modified high-vanadium non-Keggin HPA-x′ (x′ > 4). The HPA-x′ solutions have improved thermal stability and are very promising for the processes of oxidation of the lower alkenes. Kinetic peculiarities of oxidation of both alkenes in the presence of solutions of HPA-x′ and HPA-x are similar.Figure optionsDownload as PowerPoint slide