| abstract |
As the first base, a lubricating oil containing a small amount of a polyalkene-substituted succinimide having a Mn in the range of 1800-2800 is circulated by the lubrication system so that the succinimide forms a salt with at least a portion of the combustion acid. The lubricating oil is then contacted with an immobilized second base (a stronger base than the first base) that replaces at least a portion of the succinimide in the salt to form a retained second base: burning acid salt And releasing the succinimide into the lubricating oil. |