Method for treating shale

Details Method for treating shale Method for treating shale

1984-07-12

1986-04-22

Doll, John

Mineral oils: processes and products

Products and compositions

Lubricating oils

423121, 423130, 423131, C10G 104

Patent

active

045840881

ABSTRACT:
A method for producing a kerogen concentrate from oil shale comprises treating shale with a first aqueous caustic treating solution to produce a shale product of substantially transformed mineral content, and then treating the shale product with an aqueous acid solution to produce a first kerogen concentrate. The acid solution extracts minerals from the shale product to make a low ash content first kerogen concentrate. A spent acid solution containing the extracted minerals can be treated to recover minerals therefrom. The first kerogen concentrate is then treated with a second aqueous caustic treating solution to produce a second kerogen concentrate of lower ash content. The first and second aqueous caustic treating solutions are preferably the same.

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patent: 4491514 (1985-01-01), Siskin

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