Solvent extraction of hydrocarbon oils

Mineral oils: processes and products – Fractionation – Liquid extraction with solvents

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C10G 2120

Patent

active

043280927

ABSTRACT:
A solvent refining process utilizing N-methyl-2-pyrrolidone as solvent in which the extract from the solvent extraction zone is cooled to form two immiscible liquid phases, a secondary extract phase and a secondary raffinate phase. The secondary raffinate phase is returned to the extraction zone resulting in increased yield of refined oil product and savings in energy required for the process.

REFERENCES:
patent: 2261287 (1941-11-01), Read
patent: 2261799 (1941-11-01), Franklin
patent: 2305038 (1942-12-01), Schumacher
patent: 3306849 (1967-02-01), Bozeman et al.
patent: 4057491 (1977-11-01), Bushnell et al.

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