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. 06, 1991
Filed:
Apr. 30, 1990
Applicant:
Inventors:
William E Garwood, Haddonfield, NJ (US);
Quang N Le, Cherry Hill, NJ (US);
Stephen S Wong, Medford, NJ (US);
Assignee:
Mobil Oil Corporation, Fairfax, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
C10G / ; C10G / ;
U.S. Cl.
CPC ...
208 27 ; 208 18 ; 208 58 ; 208 59 ; 208 95 ; 208 97 ; 208291 ; 585739 ;
Abstract
High viscosity index, low pour point lubricants are produced by the oligomerization of a wax-derived lubricant fraction. The fraction may be produced from slack wax or de-oiled wax by hydroisomerization over zeolite beta or hydrocracking/isomerization over an amorphous catalyst followed by selective dewaxing, preferably by catalytic dewaxing over a highly shape selective zeolite such as ZSM-23. The preferred peroxides are ditertiary alkyl peroxides such as ditertiary butyl peroxide (DTBP) and are typically used at temperatures of 100.degree.-300.degree. C.