Standard Oil Company (indiana)

Amoco Corporation

Joseph S Strukl

John A Cengel

Chang-Man Park

Peter G Pappas

Joseph J Valcho

Francis J Slama

Roger W Watson

Mark W Hunt

A lubricant composition is disclosed comprising a major amount of a lubricating oil composition and a minor amount of an overbased detergent-dispersant lubricant additive comprising a reaction product of an alkaline earth metal phenate and an ammonium alkylbenzene sulfonate wherein the phenate and the sulfonate are reacted in the presence of an alcohol of 1 to 4 carbon atoms and said reaction product is stripped to remove ammonia, water and said alcohol.

Lubricant overbased detergent-dispersants with improved solubility

Mild oxidation of polyamine crankcase dispersants passivates basically reacting polyamine dispersants to fluorocarbon compositions used in engines.

Oxidative passivation of polyamine-dispersants

Disclosed are compositions of matter and a method for their manufacture, and lubricating oil compositions containing such compositions. The compositions of matter comprise the reaction product of basic compound comprising overbased metal sulfonate, phenate, or mixtures thereof, with acidic compound comprising organic carboxylic acid, organic carboxylic acid anhydride, phosphoric acid, phosphoric acid ester, thiophosphoric acid ester, or mixtures thereof.

Modified overbased sulfonates and phenates

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Lisle, IL, United States of America

Joseph S Strukl