Trace solvent recovery in selective solvent extraction

Details Trace solvent recovery in selective solvent extraction Trace solvent recovery in selective solvent extraction

1980-09-24

1982-08-03

Gantz, Delbert E.

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

C10G 2120

Patent

active

043426468

ABSTRACT:
A process for the substantially complete recovery of N-methyl-2-pyrrolidone solvent from the raffinate and extract products of solvent refining of a petroleum base lubricating oil stock by vaporization of the major portion of the solvent from the product followed by extraction of a minor portion of the solvent with water. The process results in substantially complete removal of solvent from the refined oil and extract products and results in energy savings as compared with conventional processes.

REFERENCES:
patent: 3291728 (1966-12-01), Boyum et al.
patent: 3338823 (1967-08-01), Voetter
patent: 3451925 (1969-06-01), Morris et al.
patent: 3461066 (1969-03-01), Morris et al.
patent: 3619419 (1971-11-01), Thompson
patent: 3714033 (1973-01-01), Somekh et al.
patent: 4214975 (1980-07-01), Davis et al.

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