Treatment of tumbler reject

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

Patent

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C10G 104

Patent

active

041315359

ABSTRACT:
In the hot water process wherein tar sand is slurried in a tumbler with hot water and sodium hydroxide, oversized material, rejected from the tumbler, is mixed with a portion of slurry flood water in a second slurrying device and subjected therein to heating and dispersal of bitumen associated with the rejects. A bitumen-containing slurry is produced from the second device and this slurry is combined with the tumbler slurry and subsequently subjected to flotation to recover bitumen.

REFERENCES:
patent: 3068167 (1962-12-01), White
patent: 3619406 (1971-11-01), Bowman et al.

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