Manufacture of refrigeration oils

Details Manufacture of refrigeration oils Manufacture of refrigeration oils

1980-04-14

1981-12-08

Gantz, Delbert E.

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

208320, 208327, 208335, C10G 2116, C10G 2120

Patent

active

043046606

ABSTRACT:
Lubricating oils suitable for use in refrigeration equipment in admixture with fluorinated hydrocarbon refrigerants are produced by solvent extraction of naphthenic lubricating oil base stocks, cooling the resulting extract mixture, optionally with the addition of a solvent modifier, to form a secondary raffinate and a secondary extract, and recovering a dewaxed oil fraction of lowered pour point from the secondary raffinate as a refrigeration oil product.
The process of the invention obviates the need for a separate dewaxing operation, such as dewaxing with urea, as conventionally employed for the production of refrigeration oils.

REFERENCES:
patent: 2079885 (1937-05-01), Voorhees
patent: 2106234 (1938-01-01), Bray
patent: 2261287 (1941-11-01), Read
patent: 3306849 (1967-02-01), Bozeman, Jr. et al.
patent: 4057491 (1977-11-01), Bushnell et al.
G. A. Purdy, Petroleum, Copp Clark Publishing Co., 1958, pp. 211-213.

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