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. 19, 1977
Filed:
May. 27, 1975
Frederick A Bain, Willowdale, CA;
John O Roberts, Toronto, CA;
Great Canadian Oil Sands Limited, Toronto, CA;
Abstract
A process for treating retention pond sludge containing greater than 20% solids including minerals and bitumen and associated with the aqueous extraction of bitumen from tar sands to provide water substantially reduced in solids content which comprises agitating the sludge with water to provide a diluted sludge with a solids concentration in the range of 6 to 18% by weight, and thereafter settling the sludge to form a lower layer having a solids content substantially higher than that of the sludge an upper layer of bituminous froth, and a middle layer of water having a substantially lower solids content than said undiluted sludge and recovering said upper layer.