Tar sands extraction process

Details Tar sands extraction process Tar sands extraction process

B - Operations, Transporting

03

B

B03B 9/02 (2006.01) C10G 1/04 (2006.01)

Patent

CA 2168808

A hot water extraction process for extracting bitumen from tar sands is taught using a conditioning agent containing an alkali metal bicarbonate and an alkali metal carbonate. A source of calcium and/or magnesium ions can also be added. The conditioning agent replaces the caustic soda agent previously used intar sand extraction. The use of the alkali metal bicarbonate and carbonate 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.

Procédé d'extraction à l'eau chaude du bitume des sables bitumineux, à l'aide d'un agent de conditionnement renfermant un carbonate et un bicarbonate de métal alcalin et, éventuellement, une source d'ions de calcium et/ou de magnésium. Cet agent remplace la soude caustique traditionnellement utilisée dans l'exploitation des sables bitumineux. Le carbonate et le bicarbonate de métal alcalin éliminent pratiquement la formation de boues, pour un rendement égal ou supérieur en bitume. Le procédé prévoit le recyclage de la solution chaude d'agent de conditionnement via un réservoir de stockage.

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