Preparation of catalytically active poly-metal oxide materials which contain the elements V and Mo in oxide form as basic components

摘要

PCT No. PCT/EP94/03345 Sec. 371 Date Apr. 19, 1996 Sec. 102(e) Date Apr. 19, 1996 PCT Filed Oct. 11, 1994 PCT Pub. No. WO95/11081 PCT Pub. Date Apr. 27, 1995In a process for the preparation of catalytically active poly-metal oxide materials containing Mo and V, a catalyst intermediate is calcined at from 300 DEG to 450 DEG C. in a gas atmosphere which, in addition to inert gases and/or steam, consists of from 0.5 to 4% by volume of O2 and, averaged over the calcination time, from 1 to 8% by volume of NH3.