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:
May. 21, 1985
Filed:
Mar. 04, 1983
Patricia R Blum, Macedonia, OH (US);
Ernest C Milberger, Solon, OH (US);
Mark L Nicholas, Cleveland, OH (US);
The Standard Oil Company, Cleveland, OH (US);
Abstract
A process is provided for activating fluidizable catalysts containing the mixed oxides of vanadium and phosphorus useful for the production of maleic anhydride from 4-carbon atom hydrocarbons and oxygen by subjecting the catalyst to fluidization conditions and contacting the fluidized catalyst with oxygen at a temperature at least 20.degree. C. greater than the temperature required to produce about 85 percent conversion of hydrocarbon. A process is also provided for adding make-up fluid bed catalyst to an equilibrated catalyst by introducing a calcined and unequilibrated make-up catalyst into the fluid bed vessel containing equilibrated catalyst, subjecting the mixture to fluidization conditions and contacting the fluidized catalyst mixture with oxygen at a temperature at least 20.degree. C. greater than the temperature required to produce about 85 percent conversion of the hydrocarbon. The catalysts so activated and a process for producing maleic anhydride from 4-carbon atom hydrocarbons is also provided.