Recovery of bitumen from tar sands

Mineral oils: processes and products – Products and compositions – Lubricating oils

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C10G 104

Patent

active

041742630

ABSTRACT:
Bitumen is separated from tar sands by contacting the tar sands with a small amount of liquid, heating the liquid treated tar sands to expand the liquid as a vapor thereby reducing the density of the bitumen and separating the bitumen from the remainder of the tar sands on the basis of density.

REFERENCES:
patent: 3203888 (1965-08-01), Butler et al.
patent: 3401110 (1968-09-01), Floyd et al.
patent: 3542666 (1970-11-01), Simpson
patent: 3573195 (1971-03-01), Bowman et al.
patent: 3573196 (1971-03-01), Cymbalisty
patent: 3941679 (1976-03-01), Smith et al.

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