Solvent refining process

Details Solvent refining process Solvent refining process

1980-02-14

1981-10-13

Gantz, Delbert E.

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

208322, C10G 2120

Patent

active

042946891

ABSTRACT:
An improved process for solvent refining lubricating oil base stocks from petroleum fractions containing both aromatic and non-aromatic constituents utilizing N-methyl-2-pyrrolidone as a selective solvent for aromatic hydrocarbons wherein the refined oil fraction and the extract fraction are freed of final traces of solvent by stripping with gaseous ammonia.
The process has several advantages over conventional processes including a savings in energy required for the solvent refining process, and reduced corrosion of the process equipment.

REFERENCES:
patent: 2128029 (1938-08-01), Hendrey
patent: 3470089 (1969-09-01), Morris et al.
patent: 4057491 (1977-11-01), Bushnell et al.

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