CATALYST AND PRECATALYST FOR GAS PHASE OXIDATION, METHOD FOR PRODUCING ANHYDRIDES OF CARBOXYLIC ACIDS

摘要

Disclosed is a catalyst for gas phase oxidations, comprising an inert carrier and a catalytically active material that is applied thereupon and contains transition metal oxides, or a precatalyst. Said (pre)catalyst is obtained by processing the inertcarrier with an aqueous suspension or solution of the transition metal oxides or the precursor compounds thereof. The suspension contains a binder dispersion while the binder is a copolymer of an a-olefin and a vinyl-C2-C4-carboxylate, the vinyl-C2-C4-carboxylate content of which amounts to at least 62 mole percent.