Method of reclaiming waste oil by distillation and extraction

Details Method of reclaiming waste oil by distillation and extraction Method of reclaiming waste oil by distillation and extraction

1976-06-03

1978-01-31

Gantz, Delbert E.

Mineral oils: processes and products

Refining

Purifying used oil

208184, C10M 1100

Patent

active

040714381

ABSTRACT:
An effective method of reclaiming or re-refining modern-day, additive-supplemented waste oils such as those derived from gasoline or diesel engine crankcases is provided which achieves substantial oil purification at relatively low cost and without creation of waste disposal problems common to conventional methods such as those involving clay and acid treatment. The method hereof includes the steps of dehydrating and fractionating the waste oil to remove water and the light ends, followed by vacuum distillation to give various grades of oil and solvent treatment with a solvent such as nitrobenzene to remove substantially all undesirable impurities from the oil. Reclaimed oil is thereafter recovered by steam stripping techniques which also allows collection and reuse of the solvent, in order to materially reduce operational costs.

REFERENCES:
patent: 1988773 (1935-01-01), Baender
patent: 2162195 (1939-06-01), Greensfelder et al.
patent: 3639229 (1972-02-01), Brownawell et al.
patent: 3763036 (1973-10-01), Jordan et al.
patent: 4021333 (1977-05-01), Habiby et al.

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