Increasing settling rate of fine solids in oil sand tailings

Details Increasing settling rate of fine solids in oil sand tailings Increasing settling rate of fine solids in oil sand tailings

1996-08-16

1998-09-08

McCarthy, Neil

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210712, 210803, C02F 152, B01D 2101

Patent

active

058040773

ABSTRACT:
Calcium sulphate is added to desanded tailings derived from a hot water extraction process for recovering bitumen from oil sand. Enough calcium sulphate (100 to 200 ppm) is added to remove naphthenates and sulfonates from the aqueous phase. As a result, the settling rate of the fines in the tailings is accelerated.

REFERENCES:
patent: 4225433 (1980-09-01), Liu et al.
patent: 4282103 (1981-08-01), Fuhr et al.
patent: 4414117 (1983-11-01), Yong et al.
patent: 5047154 (1991-09-01), Comstock et al.

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