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:
Apr. 09, 1991
Filed:
May. 23, 1990
Applicant:
Inventor:
Avilino Sequeira, Jr, Port Arthur, TX (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ; C10G / ;
U.S. Cl.
CPC ...
208 33 ; 208 28 ; 208187 ; 208188 ; 208311 ; 208321 ; 208 37 ; 208 18 ;
Abstract
An improvement has been discovered in a process for solvent dewaxing a hydrocarbon lubricating oil stock. Solvent dewaxed oils are steam stripped and then vacuum dehydrated at 2.5 psia at the steam stripping temperature of 350.degree. F. to 450.degree. F. Nitrogen or natural gas having a dew point of -100.degree. F. or lower is contacted with the oil at 0.5 to 1 SCF/bbl. A solvent free lubricating oil is produced which is water haze free in cold storage.