Mineral oils: processes and products – Fractionation – Liquid extraction with solvents
Patent
1988-12-02
1991-01-01
McFarlane, Anthony
Mineral oils: processes and products
Fractionation
Liquid extraction with solvents
208 13, 208337, 210806, C10G 2102
Patent
active
049815792
ABSTRACT:
This invention provides for a process for separating extractable organic material from a feed composition comprising said extractable organic material intermixed with solids and water, the process comprising the steps of: (A) contacting said feed composition with a first organic solvent, said first organic solvent being capable of dissolving at least about ten parts of said extractable organic material per million parts of said first organic solvent at the temperature wherein at least about 50% by weight of said first organic solvent boils at atmospheric pressure; dissolving at least part of said extractable organic material in said first organic solvent to form a first solution; and separating at least part of said first solution from said feed composition to provide an intermediate composition, part of said first organic solvent remaining intermixed with said intermediate composition; and (B) contacting said intermediate composition with a volatile organic solvent, said voltile organic solvent being capable of dissolving at least about ten parts of said first organic solvent per million parts of said volatile organic solvent at the temperature wherein at least about 50% by weight of said volatile organic solvent boils at atmospheric pressure; dissolving at least part of said first organic solvent in said volatile organic solvent to form a second solution; and separating said second solution from said intermediate composition to provide a treated product.
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Eppig C. P.
Hauser J. B.
Littler R. D.
Paspek S. C.
Rohlik A. R.
Evans Larry W.
Gilbert Teresan W.
McFarlane Anthony
The Standard Oil Company
Untener David J.
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