Process for regenerating exhausted oils

Details Process for regenerating exhausted oils Process for regenerating exhausted oils

C - Chemistry, Metallurgy

10

M

196/200

C10M 175/00 (2006.01)

Patent

CA 1109817

ABSTRACT OF THE DISCLOSURE For refining spent motor oil in order to recover lubricating bases to be reused, the stock to be refined is first stripped of water and light hydrocarbons, then a first extraction with a solvent (preferably a lower paraffin), heating the oil stripped of the solvent, distilling it under vacuum to separate light, medium and heavy lubricating bases, heating the heavier lubricating base and then extracting it with the same solvent as aforesaid, and sending the lubricating bases, separately and individually, to a hydrofinish stage. The recycle to solvent extraction of the heavy bases, affords the advantage of important heat savings and the possibility of adopting blander working conditions in the hydro- finish of the heavier lubricating bases.

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