Spent oil recovery process

Details Spent oil recovery process Spent oil recovery process

1982-06-11

1983-09-27

Gantz, Delbert E.

Mineral oils: processes and products

Refining

Purifying used oil

208185, C10M 1100

Patent

active

044067780

ABSTRACT:
A process for reclaiming spent oil comprises the steps of removing water and light hydrocarbons, thermally treating the stripped oil, extracting it with a supercritical gas to insolubilize impurities and additives, separating the gas-rich fractions from the oil-depleted gas fractions, expanding the insoluble fractions, separating the additives and impurities, separating the various hydrocarbon fractions according to the respective viscosities, compressing and recycling the gas phases and withdrawing the residue and the oil fractions according to the respective viscosities.

REFERENCES:
patent: 1898168 (1933-02-01), Belden
patent: 3919076 (1975-11-01), Cutler et al.
patent: 4233140 (1980-11-01), Antonelli et al.
Hydrocarbon Process., 4/74 "Re-refining Uses Propane Treatment", pp. 129-131.

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