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. 21, 2011
Filed:
Apr. 29, 2009
Dennis Dykstra, Pinole, CA (US);
Theodorus Maesen, Richmond, CA (US);
Alexander E. Kuperman, Orinda, CA (US);
Soy Uckung, Richmond, CA (US);
Darren Fong, Oakland, CA (US);
Dennis Dykstra, Pinole, CA (US);
Theodorus Maesen, Richmond, CA (US);
Alexander E. Kuperman, Orinda, CA (US);
Soy Uckung, Richmond, CA (US);
Darren Fong, Oakland, CA (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A stable catalyst with low volumetric shrinkage and a process for making the stable catalyst with low volumetric shrinkage is disclosed. The catalyst is made by sulfiding a catalyst precursor containing at least a Group VIB metal compound; at least a promoter metal compound selected from Group VIII, Group IIB, Group IIA, Group IVA and combinations thereof, having an oxidation state of either +2 or +4; optionally at least a ligating agent; optionally at least a diluent. In the process of making the catalyst, the catalyst precursor is first shaped then heat treated at a temperature of 50° C. to 200° C. for about 15 minutes to 12 hours, wherein the catalyst precursor still has a low (less than 12%) volumetric shrinkage after exposure to a temperature of at least 100° C. for at least 30 minutes, e.g., in sulfidation or in a hydrotreating reactor.