Method for reclaiming waste lubricating oils

Details Method for reclaiming waste lubricating oils Method for reclaiming waste lubricating oils

C - Chemistry, Metallurgy

10

M

196/200

C10M 175/00 (2006.01)

Patent

CA 1091607

ABSTRACT OF THE DISCLOSURE A method for purifying and reclaiming used lubricating oils containing additives such as detergents, antioxidants, corrosion inhibitors, extreme pressure agents and the like and other solid and liquid contaminants by preferably first vacuum distilling the used oil to remove water and low- boiling contaminants, and treating the dried oil with a solvent mixture of butanol, isopropanol and methylethyl ketone which causes the separation of a layer of sludge containing contaminants, unspent additives and oxidation products. After solvent recovery, the desludged oil is then subjected to conventional lubricating oil refining steps such as distillation followed by decolorization and deodorization.

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