Process and system for recovering oil from oil bearing soil such

Mineral oils: processes and products – Tar sand treatment with liquid

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208391, C10G 100

Patent

active

049293419

ABSTRACT:
Oil bearing soil is contacted in a contacting zone with a liquid medium comprising water and a lipophilic solvent which is miscible or soluble with water. The medium can include a yield improving agent comprising a water soluble acidic ionic salt or a water soluble ionic acid. The contacting produces an emulsion which comprises the oil from the oil bearing soil and the liquid medium. The inorganic portion of the soil is dispersed in the emulsion and it is separated from the emulsion by gravity or other suitable means. The emulsion is broken by an emulsion breaking agent into two phases. The two phases are allowed to separate into two layers. The first layer comprises the oil and minor amounts of the liquid medium. The second layer comprises the liquid medium and minor amounts of the oil. The first layer is then recovered. The medium from the second layer can be recycled into the contacting zone.

REFERENCES:
patent: 3509037 (1970-04-01), Tse
patent: 4217202 (1980-08-01), Paraskos et al.
patent: 4250016 (1981-02-01), Estes et al.
patent: 4491512 (1985-01-01), Euker, Jr.

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