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:
Mar. 07, 1989
Filed:
Dec. 09, 1987
Applicant:
Inventor:
Robert C Edwards, Naperville, IL (US);
Assignee:
Amoco Corporation, Chicago, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549260 ; 549259 ;
Abstract
A process is disclosed for the improvement of a vanadium-phosphorus-oxygen catalyst or a vanadium-phosphorus-oxygen-co-metal catalyst suitable for use in the manufacture of maleic anhydride from butane, which process comprises applying in situ water and a phosphorus compound in an amount to partially deactivate a portion of the catalyst in a catalyst bed containing an exotherm of reaction which was present in the catalyst bed prior to the addition of the phosphorus compound, thereby moving the exotherm downstream into the catalyst bed and thus improving the catalyst. These catalysts are useful for the manufacture of maleic anhydride from butane feedstock.