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:
Oct. 16, 2007
Filed:
Oct. 03, 2003
Ian A. Cody, Baton Rouge, LA (US);
William J. Murphy, Baton Rouge, LA (US);
Sylvain Hantzer, Praireville, LA (US);
David W. Larkin, Baton Rouge, LA (US);
John E. Gallagher, Jr., Fairfax Station, VA (US);
Jeenok T. Kim, Fairfax, VA (US);
Ian A. Cody, Baton Rouge, LA (US);
William J. Murphy, Baton Rouge, LA (US);
Sylvain Hantzer, Praireville, LA (US);
David W. Larkin, Baton Rouge, LA (US);
John E. Gallagher, Jr., Fairfax Station, VA (US);
Jeenok T. Kim, Fairfax, VA (US);
Exxonmobil Research and Engineering Company, Annandale, NJ (US);
Abstract
A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreating step is under conditions such that the amount of conversion to 343° C. minus is less than 5 wt. % of the feedstock and the VI increase is less than 4 VI over the feedstock. Hydrodewaxing uses a low alpha catalyst and hydrofinishing is accomplished with a catalyst based on the M41S family.