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. 04, 1991
Filed:
Feb. 28, 1989
Applicant:
Inventor:
Diana M Altrichter, Concord, CA (US);
Assignee:
Shell Oil Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208113 ; 208124 ; 208149 ; 502 41 ; 502 43 ; 423239 ; 423247 ;
Abstract
A process is disclosed wherein a regenerator is operated in an incomplete mode of combustion to regenerate FCC catalyst to burn coke contained thereon in the presence of a CO oxidation promoter. The quantity of the CO oxidation promoter is regulated so that there is at least two and preferably at least three times the minimum quantity of CO oxidation promoter present than necessary to prevent temperature excursions in the dilute phase caused by afterburn combustion of CO to CO.sub.2. The regeneration zone is maintained in an incomplete mode of combustion defined by having a CO content greater than 1.0 percent and preferably from 1 to 10 percent.