Method for stabilizing a phosphorus-vanadium-oxygen complex cata

Details Method for stabilizing a phosphorus-vanadium-oxygen complex cata Method for stabilizing a phosphorus-vanadium-oxygen complex cata

1976-12-22

1978-06-13

Jiles, Henry R.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

26034675, 260533R, 260533N, B01J 2392, B01J 2728

Patent

active

040948161

ABSTRACT:
The present disclosure relates to a method for the stabilization of certain phosphorus-vanadium-oxygen complex catalysts by the repetitive reactivation of such catalysts using a specified class of reactivating agents. The present method is specifically applicable to the stabilization of phosphorus-vanadium-oxygen complex catalysts which are suitable for the production of maleic anhydride from aromatic or aliphatic feed streams. In a specific instance, the stabilization process incorporates passing a feed stream of an aliphatic hydrocarbon and oxygen over a phosphorus-vanadium-oxygen catalyst to cause it to deactivate, thereafter contacting the deactivated catalyst with a specified class of reactivating agents and thereafter repeating this sequence at least once. This process tempers the catalyst so it deactivates at a lower rate and is improved in its performance.

REFERENCES:
patent: 4020174 (1977-04-01), Partenheimer

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