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:
May. 17, 1988
Filed:
May. 28, 1986
Eric L Moorehead, Diamond Bar, CA (US);
Sidney Y Shen, Cypress, TX (US);
Union Oil Company of California, Los Angeles, CA (US);
Abstract
Full-range shale oils or fractions thereof, after hydrotreating, or hydrowaxed and then hydrogenated to produce lubricating oil fractions boiling above 650.degree. F., having a pour point at or below +10.degree. F., and a viscosity index of at least 95. In the preferred operation, the hydrogenation is effected with a noble metal-containing catalyst wherein the noble metal is dispersed by cation exchange into a carrier comprising a silica-alumina cogel or copolymer dispersed in a large pore alumina gel matrix. It has been found with shale oils that the hydrogenation in the preferred embodiment also results in hydrocracking of some of the polynaphthenic compounds. Since polynaphthenic compounds can contribute to or themselves cause low viscosity index in lubricating base oil, the invention is believed particularly applicable to those feedstocks, not necessarily of shale origin, wherein it is desired or necesary to raise the viscosity index by hydrogenation with simultaneous hydrocracking of polynaphtenic compounds .