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:
May. 06, 1997
Filed:
Jun. 06, 1995
Applicant:
Inventor:
Reginald D Humphreys, Edmonton, CA;
Assignee:
Geopetrol Equipment Ltd., Edmonton, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10G / ;
U.S. Cl.
CPC ...
208391 ;
Abstract
A hot water extraction process for extracting bitumen from tar sands is taught using a conditioning agent containing sodium and/or potassium bicarbonate or, alternatively, sodium bicarbonate and/or potassium bicarbonate and sources of calcium ions and/or magnesium ions. The conditioning agent replaces the caustic soda agent previously used in tar sand extraction. The use of the alkali metal bicarbonate solvent substantially eliminates the production of sludge in tar sand extraction and maintains or improves bitumen recovery. The process allows for hot conditioning agent solution to be recycled to the process by use of a recycle storage tank.