Process for cleaning used oils

Details Process for cleaning used oils Process for cleaning used oils

1974-02-20

1976-05-04

Gantz, Delbert E.

Mineral oils: processes and products

Refining

Purifying used oil

208183, C10M 1100

Patent

active

039546020

ABSTRACT:
A process for cleaning a used oil, in particular engine oil and industrial lubricating oil. The process comprises heat treating the used oil in a heat treatment zone at a temperature of 325.degree.-400.degree.C at a pressure of 1-6 bars for a period of at least 15 minutes, continuously withdrawing a first part of the treated oil from the heat treatment zone, re-heating said first part of the oil and recycling the re-heated first part of the oil through the heat treatment zone, subjecting the remainder of the heat treated oil from the heat treatment zone to a treatment for separating out the sedimentary residues from the heat treated oil. The sedimentary residues are incinerated in the re-heating furnace for re-heating said first part. A system is described for carrying out the process.

REFERENCES:
patent: 1976177 (1934-10-01), Lazar

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