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:
Dec. 29, 2009
Filed:
Dec. 05, 2003
Gerard Benard, Petit Couronne, FR;
Eric Duprey, Petit Couronne, FR;
Patrick Moureaux, Petit Couronne, FR;
Johannes Anthonius Robert Van Veen, Amsterdam, NL;
Gerard Benard, Petit Couronne, FR;
Eric Duprey, Petit Couronne, FR;
Patrick Moureaux, Petit Couronne, FR;
Johannes Anthonius Robert Van Veen, Amsterdam, NL;
Shell Oil Company, Houston, TX (US);
Abstract
Process to prepare a lubricant having a dynamic viscosity at −35° C. of below 5000 cP by performing the following steps: a) contacting a feed containing more than 50 wt % wax in the presence of hydrogen with a catalyst comprising a Group VIII metal component supported on a refractory oxide carrier, and b) contacting the effluent of step (a) with a catalyst composition comprising a noble Group VIII metal, a binder and zeolite crystallites of the MTW type to obtain a product having a lower pour point than the effluent of step (b) and having a viscosity index greater than 120, and (c) adding a pour point depressant additive to the base oil as obtained in step (b).