Preparation of mixed vanadium phosphorus oxide catalysts and the

Details Preparation of mixed vanadium phosphorus oxide catalysts and the Preparation of mixed vanadium phosphorus oxide catalysts and the

1981-11-12

1983-08-02

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252437, B01J 2714

Patent

active

043965350

ABSTRACT:
Vanadium phosphorus mixed oxide containing catalysts are prepared by sequentially forming an alpha-VOPO.sub.4 catalyst precursor in aqueous media, and thereafter partially reducing a portion of the vanadium to a valence state of +4 in an organic liquid reducing media, in the absence of corrosive reducing agents. The catalysts exhibit excellent activity for the production of maleic anhydride from 4 carbon atom hydrocarbons such as n-butane.

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