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:
Nov. 23, 1976
Filed:
May. 16, 1975
Applicant:
Inventors:
Jack H Park, Houston, TX (US);
Joseph C Allen, Bellaire, TX (US);
Assignee:
Texaco Inc., New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208 / ; 210 71 ;
Abstract
A method for separating bitumen from tar sand by solvent extraction with efficient separation of water from the recovered bitumen is disclosed. Tar sand may often be recovered by surface mining techniques. The tar sand is comprised of bitumen, water and sand including clays. The tar sand is contacted with bitumen solvent having a freezing point below that of the water, and the temperature of the mixture is lowered below the freezing point of the water in the tar sand. The solid ice crystals may then be easily removed along with the sand leaving a water-free liquid bitumen solvent mixture.