Extraction of oil shales and tar sands

Details Extraction of oil shales and tar sands Extraction of oil shales and tar sands

1975-07-24

1978-08-22

Levine, Herbert

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 11R, C10G 104

Patent

active

041087607

ABSTRACT:
This invention relates to the extraction of oil shales and tar sands by using a solvent under supercritical conditions at a temperature within 200.degree. C. or its critical temperature in order to effect extraction of kerogen from the sand or shale.
In the case of shales considerable heat needs to be applied to the shale before effective extraction can occur and extraction in this case may be carried out at a temperature within the range of 370.degree. to 450.degree. C.

REFERENCES:
patent: T700485 (1969-04-01), Hemminger et al.
patent: T700489 (1969-04-01), Long et al.
patent: 2487788 (1949-11-01), Buchan
patent: 2665238 (1954-01-01), Truitt et al.
patent: 2670317 (1954-02-01), Adams
patent: 3695354 (1972-10-01), Dilgren et al.
patent: 3850738 (1974-11-01), Stewart et al.
patent: 3929193 (1975-12-01), Duke
patent: 3948755 (1976-04-01), McCollum et al.

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