Preparation of mixed vanadium phosphorus oxide catalysts and...

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

B - Operations, Transporting

01

J

252/98, 260/365.

B01J 27/14 (2006.01) B01J 27/198 (2006.01) C07C 51/215 (2006.01) C07D 307/60 (2006.01)

Patent

CA 1183515

ABSTRACT Vanadium phosphorus mixed oxide containing catalysts are prepared by sequentially forming an alpha-VOPO4 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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