Reclaiming used lubricating oils

Details Reclaiming used lubricating oils Reclaiming used lubricating oils

1977-10-03

1979-04-24

Levine, Herbert

Mineral oils: processes and products

Refining

Purifying used oil

208251R, 208251H, C10M 1100

Patent

active

041510720

ABSTRACT:
An integrated process universally applicable for the reclaiming of used lubricating oils, regardless of the contaminants or previous additive systems contained therein, is provided to produce an intermediate low-ash oil or a high-grade lube oil stock which comprises (a) contacting the used oil with an aqueous ammonium salt treating agent, (b) removing a major portion of water, (c) separating the oil phase from the resulting residual product, (d) subjecting the resulting separated oil to hydrotreating and thereafter (e) stripping the resulting hydrotreated lube oil stock. Optionally the low-ash product of step (c) can be recovered for use as a fuel oil, in grease formulations, or in the preparation of some types of lubricating oil formulations.

REFERENCES:
patent: 3791965 (1974-02-01), Fitzsimons et al.
patent: 3879282 (1975-04-01), Johnson
patent: 3930988 (1976-01-01), Johnson

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