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. 14, 2021
Filed:
Feb. 05, 2020
Exxonmobil Research and Engineering Company, Annandale, NJ (US);
Ilona Molotoka, Baytown, TX (US);
James W. Gleeson, Magnolia, TX (US);
Joshua J. Matthews, Hankamer, TX (US);
Kristen L. Sullivan, Stewartsville, NJ (US);
Jude J. Eziashi, Cambridge, MA (US);
David Killgore, Cleveland, TX (US);
Jon D. Lachapelle, Missouri City, TX (US);
Gaither M. Phillips, Spring, TX (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
Systems and methods are provided for performing solvent dewaxing using a dewaxing solvent that is not fully miscible with the feed being dewaxed. It has been unexpectedly discovered that by operating with a ketone solvent mixture that is beyond the miscibility limit by a small amount, the rate of solvent dewaxing can be substantially increased. Additionally, the difference between the filtration temperature during solvent dewaxing and the pour point of the resulting dewaxed product is unexpectedly reduced. The dewaxing solvent beyond the miscibility limit can correspond to, for example, a solvent mixture where the weight percent of methyl ethyl ketone is beyond the miscibility limit by 0.1 vol % to 5.0 vol %.