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:
Sep. 03, 1985
Filed:
Mar. 08, 1984
Applicant:
Inventors:
Charles R Wilson, San Francisco, CA (US);
Waldeen C Buss, Kensington, CA (US);
Leslie A Field, Emeryville, CA (US);
Assignee:
Chevron Research Company, San Francisco, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ;
U.S. Cl.
CPC ...
502 66 ; 502 74 ; 502 85 ;
Abstract
A pretreatment method is disclosed for enhancing the selectivity and increasing the stability of a reforming catalyst comprising a large-pore zeolite containing at least one Group VIII metal. In this method, the catalyst is reduced in reducing atmosphere at a temperature of from 250.degree. C. to 650.degree. C., exposed to an oxygen-containing gas, treated in a reducing atmosphere at from 120.degree. C. to 260.degree. C., and maintained at a temperature of from 370.degree. C. to 600.degree. C. in a reducing atmosphere.