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

1975-05-16

1976-11-23

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

210 71, C10G 104

Patent

active

039935558

ABSTRACT:
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.

REFERENCES:
patent: 3114694 (1963-12-01), Bergougnou et al.
patent: 3751358 (1973-08-01), Elliot

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