Method of separating bitumen from tar sand with cold solvent

Details Method of separating bitumen from tar sand with cold solvent Method of separating bitumen from tar sand with cold solvent

C - Chemistry, Metallurgy

10

G

196/25

C10G 1/04 (2006.01)

Patent

CA 1069451

METHOD OF SEPARATING BITUMEN FROM TAR SAND WITH COLD SOLVENT (D#72,928-F) ABSTRACT OF THE DISCLOSURE A method for separating bitumen from tar sand by solvent extraction with efficient separation of water from the recovered bitumen is disclosed. Tar sand may often be recovered by surface mining techniques. The tar sand is comprised of bitumen, water and sand including clays. The tar sand is contacted with bitumen solvent having a freezing point below that of the water, and the temperature of the mixture is lowered below the freezing point of the water in the tar sand. The solid ice crystals may then be easily removed along with the sand leaving a water-free liquid bitumen solvent mixture. I

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