Solvent and water/surfactant process for removal of bitumen from

Details Solvent and water/surfactant process for removal of bitumen from Solvent and water/surfactant process for removal of bitumen from

1990-03-07

1990-11-06

Pal, Asok

Mineral oils: processes and products

Tar sand treatment with liquid

208391, C10G 104

Patent

active

049684124

ABSTRACT:
This invention involves the separation of clay-contaminated bitumen from sand with a solvent. The bitumen is dissolved with an organic solvent such as condensate from a natural gas well. The clay is separated from the dissolved bitumen and the solvent is recoverd and recycled. The sand is washed with water containing a carefully selected, nonanionic surface active agent to remove residual bitumen and solvent. Prior removal of the clay precludes it from unduly contaminating the water.

REFERENCES:
patent: 4402552 (1973-09-01), Bass et al.
patent: 4457827 (1984-07-01), Chung et al.
patent: 4512872 (1985-04-01), Chung et al.

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