The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 1978
Filed:
Dec. 22, 1976
Walter Partenheimer, Naperville, IL (US);
Standard Oil Company, Chicago, IL (US);
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.