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. 15, 1992
Filed:
Apr. 01, 1991
Applicant:
Inventors:
Theodore C Mead, Port Neches, TX (US);
William H Stein, Orange, TX (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208322 ; 208323 ; 208339 ;
Abstract
In a solvent refining process a lubricating oil stock is solvent extracted to yield a primary aromatics-lean raffinate and a primary aromatics-rich extract. Aromatics content of primary raffinate is controlled by manipulating extraction temperature and solvent dosage. Primary extract is separated (settled) to form a secondary raffinate and a secondary extract. The aromatics content of secondary extract is controlled by manipulating settling temperature.