Process for recovery of bitumen from a bituminous froth

Details Process for recovery of bitumen from a bituminous froth Process for recovery of bitumen from a bituminous froth

C - Chemistry, Metallurgy

10

G

196/22

C10G 1/04 (2006.01)

Patent

CA 1068228

IMPROVED PROCESS FOR RECOVERY OF BITUMEN FROM A BITUMINOUS FROTH Abstract of the Disclosure An improved method for recovery of bitumen from bituminous froth is disclosed having particular application in hot water separation of tar sands wherein comminuted tar sand is slurried in hot water, subject to gravity separation to isolate a bituminous froth, containing water and mineral matter, and the bituminous froth is diluted with a liquid hydro- carbon solvent and subject to a two-stage centrifugation to recover the substantially water and mineral-free bitumen. In this improved process, the dilution of bituminous froth with liquid hydrocarbon solvent is staged such that no more than about 90% of the total hydrocarbon solvent is added to the bituminous froth prior to the first centrifuging stage and the remaining hydrocarbon solvent is added prior to the second centrifuging stage.

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