Solvent extraction of lubricating oils

Details Solvent extraction of lubricating oils Solvent extraction of lubricating oils

1989-11-20

1991-08-13

Myers, Helane E.

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

208 87, 208 36, 208314, 208317, 208322, 208327, 208330, 208331, 208332, 208335, 585865, 585833, C10G 2120

Patent

active

050393995

ABSTRACT:
A lubricating oil stock is extracted with N-methyl-2-pyrrolidone to yield a primary raffinate useful as a high VI lubricating base oil and a primary extract. The primary extract is mixed with antisolvent and chilled to yield a secondary raffinate. This secondary raffinate is sufficiently reduced in aromatics that it is solvent extracted to yield medium to high VI lubricating base oil.

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