Process for preparing phosphorus-vanadium mixed oxide oxidation

Details Process for preparing phosphorus-vanadium mixed oxide oxidation Process for preparing phosphorus-vanadium mixed oxide oxidation

1983-12-28

1986-01-28

Doll, John

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Phosphorus or compound containing same

549259, B01J 2714, C07D30734

Patent

active

045671583

ABSTRACT:
Phosphorus-vanadium mixed oxide oxidation catalysts are prepared by introducing a substantially pentavalent vanadium-containing compound and a pentavalent phosphorus-containing compound into an alcohol medium capable of reducing the vanadium to a valence state less than +5 in the presence of an alcohol-modifying agent to form a phosphorus-vanadium mixed oxide catalyst precursor. The catalyst precursor is recovered, dried, formed into desired structures, and calcined at temperatures from about 250.degree. C. to about 600.degree. C. The catalysts are highly effective in that they exhibit a weight/weight productivity of at least 70 grams of maleic anhydride per kilogram of catalyst per hour.

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