Process for decolorizing lubricating oil additives

摘要

Lubricating oil additives, including the calcium salts of sulfurized alkylphenols and dispersants consisting of the reaction products of halogenated polyalkylenes and heterocyclic amines, are substantially decolorized by treatment with small amounts of alkali metal hydrides in a polar solvent at 20 DEG to 120 DEG C. Color improvement is obtained at concentrations ranging from 1 to 75 parts of an alkali metal hydride per 1000 parts of additive.