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:
Apr. 30, 1985
Filed:
Sep. 24, 1982
Applicant:
Inventor:
Gale L Hubred, Richmond, CA (US);
Assignee:
Chevron Research Company, San Francisco, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C01G / ; C01G / ; C01G / ; C01G / ;
U.S. Cl.
CPC ...
423 54 ; 75103 ; 423 63 ; 423 68 ; 423139 ; 423150 ;
Abstract
A process for removing nickel, cobalt, molybdenum, and vanadium from spent hydroprocessing catalyst particles by roasting the catalyst at between 400.degree. C. and 600.degree. C. and leaching the catalyst particles with an aqueous solution of ammonia and an ammonium salt.