Closed loop solvent extraction process for oil sands

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 1/04 (2006.01) B03B 9/02 (2006.01) B03D 1/02 (2006.01)

Patent

CA 2715301

The present invention is directed to a method comprising contacting an oil sand with a suitable solvent to generate a solvated oil sand slurry; separating solvent-diluted bitumen from the solvated oil sand slurry to generate (a) a solvent-diluted bitumen and (b) a slurry with increased solids concentration; and filtering the slurry with increased solids concentration. The method of the present invention may be used to produce a low ash bitumen product and dry tailings from oil sands.

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