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

摘要

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 = H_(3+x)PV_xMo_(12-x)O_(40)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 + EPA-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.