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:
Dec. 12, 1995
Filed:
Jun. 15, 1994
Noel J Bremer, Kent, OH (US);
Louis R Trott, Solon, OH (US);
David R Woodbury, Bedford Hts., OH (US);
The Standard Oil Company, Cleveland, OH (US);
Abstract
The present invention relates to improvements of fluid bed catalysts. More particularly, the present invention relates to improvements of fluid bed oxidation catalysts useful in the preparation of maleic anhydride from C.sub.4 hydrocarbons, including n-butane. The present invention includes a process of contacting a fluid bed catalyst with a reactivating agent in a catalyst standpipe. The present invention also provides a catalyst containing the mixed oxides of vanadium and phosphorus, treated using the above process. The present invention further provides a process for producing maleic anhydride, utilizing the catalyst prepared using the above process. The present invention additionally provides for a reactor standpipe, utilized for regenerating catalyst according to the above process.