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:
Jan. 28, 1986
Filed:
Aug. 28, 1984
Applicant:
Inventors:
Bernie J Pafford, Baton Rouge, LA (US);
Carl F Bertsch, Baton Rouge, LA (US);
Assignee:
Exxon Research and Engineering Co., Florham Park, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208113 ; 208120 ; 502 50 ;
Abstract
A method for improving the octane rating of products from a catalytic cracking system is disclosed. The method is directed at maintaining the metal contaminant level on the cracking catalyst above about 400 wppm equivalent metal and periodically passing the cracking catalyst through a passivation zone having a reducing atmosphere maintained at an elevated temperature to passivate the metal contaminant on the cracking catalyst.