CATALYST AND METHOD FOR PRODUCING MALEIC ANHYDRIDE

摘要

The invention relates to a catalyst molded body for producing maleic anhydride by gas-phase oxidation of a hydrocarbon having at least four carbon atoms, comprising a catalytically active mass, which contains vanadium, phosphorus, and oxygen. The catalyst molded body comprises a substantially cylindrical body having at least two, preferably four, inner through-bores substantially parallel to the cylinder axis of the body. The catalyst molded body has a large outer surface area, a lower pressure loss, and sufficient mechanical stability.