Dual solvent refining process

Details Dual solvent refining process Dual solvent refining process

C - Chemistry, Metallurgy

10

G

196/261

C10G 21/02 (2006.01)

Patent

CA 1164390

Abstract A dual solvent refining process for solvent refining petroleum based lubricating oil stocks With N-methyl- 2-pyrrolidone as selective solvent for aromatic oils wherein a highly paraffinic oil having a narrow boiling range approximating the boiling point of N-methyl-2- pyrrolidone is employed as a backwash solvent. The process of the invention results in an increased yield of refined lubricating oil stock of a predetermined quality and simplifies separation of the solvents from the extract and raffinate oil fractions.

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