Aerating tar sands-water mixture prior to settling in a gravity

Details Aerating tar sands-water mixture prior to settling in a gravity Aerating tar sands-water mixture prior to settling in a gravity

1974-09-16

1976-07-13

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

C10G 104

Patent

active

039692205

ABSTRACT:
In a hot water process for extracting bitumen from tar sands comprising forming a mixture of tar sands and water, settling the mixture in a primary extraction zone to form an upper bitumen froth layer, a middlings layer, and a sand tailings layer, passing a part of the middlings layer to an air scavenger zone to recover additional bitumen therefrom, the improvement which comprises aerating the mixture of tar sands and water before separating bitumen froth from the mixture in a gravity settling zone. This aeration can be accomplished by adding an aerated recycle middlings stream to the tar sands water-mixture prior to the settling step.

REFERENCES:
patent: 3401110 (1968-09-01), Floyd et al.
patent: 3487003 (1969-12-01), Baillie et al.
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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