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:
Feb. 13, 2001
Filed:
Aug. 22, 1997
Sylvain Hantzer, Prairleville, LA (US);
Alberto Ravella, Baton Rouge, LA (US);
Ian A. Cody, Baton Rouge, LA (US);
Darryl P. Klein, Baton Rouge, LA (US);
Exxon Research and Engineering Company, Florham Park, NJ (US);
Abstract
A three stage process for producing high quality white oils, particularly food grade mineral oils from mineral oil distillates. The first reaction stage preferably employs a sulfur resistant hydrotreating catalyst and produces a product suitable for use as a high quality lubricating oil base stock. The second reaction stage preferably employs a hydrogenation/hydrodesulfurization catalyst combined with a sulfur sorbent and produces a product stream which is low in aromatics and which has substantially “nil” sulfur. The final reaction stage employs a selective hydrogenation catalyst that produces a product suitable as a food grade white oil.