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

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.