Improved hydroseparation process for aqueous extraction of bitum

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

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C10G 104

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active

039517799

ABSTRACT:
A method for improving recovery in a hot water process for extracting bitumen from tar sands comprising adding bitumen-depleted middlings recovered from a scavenger zone to the sand layer in a primary extraction vessel at a point below the surface of the sand.

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patent: 3509037 (1970-04-01), Tse
patent: 3530042 (1970-09-01), Graybill et al.
patent: 3558469 (1971-01-01), White et al.
patent: 3607720 (1971-09-01), Paulson

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