Process for preparing phosphorus-vanadium-oxygen catalysts

Details Process for preparing phosphorus-vanadium-oxygen catalysts Process for preparing phosphorus-vanadium-oxygen catalysts

1974-09-03

1976-08-31

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252437, 2603468A, B01J 2718

Patent

active

039779980

ABSTRACT:
The performance of phosphorus-vanadium-oxygen catalysts useful for the conversion of saturated aliphatic hydrocarbons to maleic anhydride is dependent on the controlled calcination of the catalyst precursor. Phosphorus-vanadium-oxygen catalysts are prepared by mixing phosphorus and vanadium compounds to form precursors containing tetravalent vanadium, and calcining the precursors in an oxidizing atmosphere until a controlled level of pentavalent vanadium has been achieved, and then calcining the precursors in an inert atmosphere to higher temperatures to provide catalysts with the desired oxidation levels that are promptly active, so that valuable manufacturing facilities are not required to "activate the catalyst."

REFERENCES:
patent: 3293268 (1966-12-01), Bergman et al.
patent: 3864280 (1975-02-01), Schneider

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