Rerefining of used motor oils

Details Rerefining of used motor oils Rerefining of used motor oils

C - Chemistry, Metallurgy

10

M

196/200

C10M 175/00 (2006.01)

Patent

CA 1076507

REREFINING OF USED MOTOR OILS Abstract of the Disclosure: Screened and drained used lubricating oil stock is predistilled in a steam stripping still for about four hours or more. The thus predistilled used oil then flows to an evapora- tor for a vacuum distillation at a temperature below the crack- ing temperature of the stock, about 480°-650°F., to effect an evaporation of the used lubricating oil and its separation from a concentrate by-product of heavy lube hydrocarbons and addi- tives.

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