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:
Aug. 25, 2009
Filed:
Apr. 20, 2005
Susan M. Abernathy, Hercules, CA (US);
David R. Johnson, Petaluma, CA (US);
John M. Rosenbaum, Richmond, CA (US);
Don Young, Medford, OR (US);
Susan M. Abernathy, Hercules, CA (US);
David R. Johnson, Petaluma, CA (US);
John M. Rosenbaum, Richmond, CA (US);
Don Young, Medford, OR (US);
Chevron U.S.A. Inc., San Ramon, CA (US);
Abstract
A process for producing a lubricating base oil having high oxidation stability, wherein the feed used to prepare the lubricating base oil contains at least 5 wt. % olefins, said process comprising (a) determining the weight percent of olefins present in the feed by means ofH NMR; (b) hydroprocessing the feed under hydroprocessing conditions selected to reduce the amount of olefins present to a target value which has been pre-determined by means ofH NMR to produce a lubricating base oil having the desired oxidation stability; and (c) collecting a lubricating base oil having the selected oxidation stability from the hydroprocessing zone.