Method of treating waste engine oils

Details Method of treating waste engine oils Method of treating waste engine oils

1980-11-10

1982-06-08

Tufariello, T. M.

Mineral oils: processes and products

Refining

Purifying used oil

C10M 1100

Patent

active

043338224

ABSTRACT:
A method for the continuous decomposition of stable carbon dispersions in waste engine oils, the decomposition being immediately followed by an oil re-refining step as, preferably, a short-path distillation. In accordance with the invention, waste oil is heated, under a pressure ranging from 1 to 100 Pa, in the form of a thin film (0.1 to 2 mm thickness) to a temperature of 200.degree.-300.degree. C., whereby liberated vapors together with entrained microdrops condense at a temperature of 20.degree.-100.degree. C. Thereupon the condensate is immediately subjected to a short-path distillation to be re-refined. The entire process is advantageously effected in a single apparatus.

REFERENCES:
patent: 3392803 (1968-07-01), Robinson
patent: 4033859 (1977-07-01), Davidson
patent: 4053006 (1977-10-01), Tkac
patent: 4101414 (1978-07-01), Kim

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