Preparation of improved mixed vanadium phosphorus oxide...

Details Preparation of improved mixed vanadium phosphorus oxide... Preparation of improved mixed vanadium phosphorus oxide...

B - Operations, Transporting

01

J

252/99, 260/365.

B01J 27/198 (2006.01) C07C 51/215 (2006.01) C07C 51/25 (2006.01) C07D 307/60 (2006.01)

Patent

CA 1197230

ABSTRACT PREPARATION OF IMPROVED MIXED VANADIUM PHOSPHORUS OXIDE CATALYSTS AND THEIR USE IN OXIDATION PROCESSES Vanadium phosphorus mixed oxide containing catalysts are prepared in an organic liquid reaction medium capable of reducing the vanadium to a valence state of about +4 to form a non-solubilized catalyst precursor, contacting the non-solubilized catalyst precursor containing organic liquid with water to form a two phase system having an upper organic liquid phase and a lower non-solubilized catalyst precursor containing aqueous phase, drying the catalyst precursor and calcining. The vanadium phosphorus oxide catalysts so obtained are useful in the production of maleic anhydride from 4 carbon atom hydrocarbons.

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