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:
Mar. 19, 2013
Filed:
Jul. 01, 2009
Curtis Bay Campbell, Hercules, CA (US);
Eugene Edward Spala, Fairfield, CA (US);
Willie Horn, Jr., Oakland, CA (US);
Curtis Bay Campbell, Hercules, CA (US);
Eugene Edward Spala, Fairfield, CA (US);
Willie Horn, Jr., Oakland, CA (US);
Chevron Oronite Company LLC, San Ramon, CA (US);
Abstract
The present invention is directed to a method for preparing an unsulfurized, carboxylate-containing additive for lubricating oils and the product produced by said method, wherein said method comprises a) neutralization of a mixture of at least two alkyl phenols using an alkaline earth base in the presence of a promoter, to produce a mixture of alkyl phenates, wherein the mixture of at least two alkyl phenols comprises at least a first alkyl phenol wherein the alkyl group is derived from an isomerized alpha olefin and a second alkyl phenol wherein the alkyl group is derived from a branched chain olefin; (b) carboxylation of the mixture of alkyl phenates obtained in step (a) using carbon dioxide under carboxylation conditions sufficient to convert at least 20 mole % of the starting alkyl phenols to alkyl salicylate; and (c) removal of at least about 10% of the starting mixture of at least two alkyl phenols from the product produced in step (b) to produce said additive.