Mineral oils: processes and products – Fractionation – Liquid extraction with solvents
Patent
1986-05-15
1987-06-23
Pal, Asok
Mineral oils: processes and products
Fractionation
Liquid extraction with solvents
208309, 208313, 208314, 208952, C10G 104
Patent
active
046751017
ABSTRACT:
A method of fractionating a mixture containing high boiling carbonaceous material and normally solid mineral matter includes processing with a plurality of different supercritical solvents. The mixture is treated with a first solvent of high critical temperature and solvent capacity to extract a large fraction as solute. The solute is released as liquid from solvent and successively treated with other supercritical solvents of different critical values to extract fractions of differing properties. Fractionation can be supplemented by solute reflux over a temperature gradient, pressure let down in steps and extractions at varying temperature and pressure values.
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Fisher Robert J.
Glenn Hugh W.
Hightower Judson R.
Pal Asok
The United States of America as represented by the United States
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