Method of rerefining oil with recovery of useful organic additiv

Details Method of rerefining oil with recovery of useful organic additiv Method of rerefining oil with recovery of useful organic additiv

1975-11-12

1977-06-07

Gantz, Delbert E.

Mineral oils: processes and products

Refining

Purifying used oil

208181, C10M 1100

Patent

active

040282260

ABSTRACT:
Used oil is rerefined by diluting it with a water-soluble polar diluent and removing insoluble impurities from the resulting solution, adding water to produce a two-phase system, separating the organic phase and removing the polar diluent therefrom. By this method, it is possible to recover oil which still contains viscosity modifying additives and the like. If desired, the rerefined oil can be subjected to further treatment such as hydrogenation.

REFERENCES:
patent: 1584588 (1926-05-01), Acheson
patent: 1766768 (1930-06-01), Werkenthin
patent: 1882002 (1932-10-01), Dietrich
patent: 1990359 (1935-02-01), Ambler
patent: 2294461 (1942-09-01), Jones
patent: 2376418 (1945-05-01), Clark et al.
patent: 2568583 (1951-09-01), Graves
patent: 3763036 (1973-10-01), Jordan et al.
patent: 3819508 (1974-06-01), Fainman et al.
patent: 3835035 (1974-09-01), Fainman et al.

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