Texaco Inc.

Brian L Papke

Leonard S Bartley, Jr

John Castrogiovanni, Jr

Benjamin J Kaufman

Sheldon Herbstman

Harry Chafetz

Christopher S Liu

Isaac D Rubin

Tze-Chi Jao

Elaine C DeCanio

Edward R Arndt

Issac D Rubin

Thomas A Kennedy

Kenneth L Kreuz

A detergent additive composition for diesel fuel contains a low molecular weight polyisobutylene monosuccinimide of polyethylene polyamine in an aromatic hydrocarbon diluent. The detergent additive composition may be used to remove or prevent engine deposits and their corrosive effects.

Detergent additive compositions for diesel fuels

Lubricating oil composition containing the reaction product of an

A continuous method of preparing an overbased calcium sulfonate which comprises repeating the following steps until a desired TBN is obtained, said method comprising: (a) contacting Ca (OH).sub.2 and methanol with a normal calcium sulfonate hydrocarbon solution to solubilize at least a portion of the Ca(OH).sub.2 ; (b) filtering the sulfonate solution to separate and remove the non-solubilized Ca(OH).sub.2 from the solubilized Ca(OH).sub.2 contained in an obtained sulfonate filtrate; (c) treating said sulfonate filtrate with gaseous CO.sub.2 to convert the solubilized CA(OH).sub.2 to solubilized CaCO.sub.3 ; (d) blowing said solubilized CaCO.sub.3 with an inert gas to remove therefrom any excess CO.sub.2 and the aqueous phase generated therein to obtain an overbased sulfonate liquid; (e) adding more of said normal calcium sulfonate solution to said overbased sulfonate liquid and contacting said overbased sulfonate liquid with said non-solubilized Ca(OH).sub.2 and additional fresh Ca(OH).sub.2 to obtain an overbased sulfonate liquid product; (f) repeating steps (b) through (e) until the desired TBN of the sulfonate liquid product is obtained, and removing an amount of sulfonate liquid product after step (d) equal to the additions of normal calcium sulfonate and Ca(OH).sub.2 in step (e); and (g) stripping the methanol and hydrocarbon solvent from the sulfonate liquid removed after step (d) to obtain the overbased calcium sulfonate product.

Continuous process for preparing overbased salts

Lubricants with enhanced viscosities are made from additives by combining dispersant viscosity index polymer, like dispersancy-substituted polyolefins, and detergent, like overbased, oil-soluble, metal salts, before adding dispersant package.

Combining dispersant viscosity index improver and detergent additives

Lubricants with enhanced viscosities are made from additives by combining dispersant viscosity index improver, like dispersant nitrogen-substituted polyolefins, and detergent, like select overbased, oil-soluble, metal salts, before adding dispersant package.

An improvement is provided in a process for making a calcium sulfonate wherein a calcium base/calcium sulfonate mixture is mixed, stirred, reacted with CO.sub.2, and filtered to produce the sulfonate product. The improvement comprises stirring the calcium base/calcium sulfonate mixture at variable speeds over a sufficient length of time, whereby the product's filterability is enhanced and viscosity reduced.

Process for producing an overbased sulfonate

A method of preparing a amorphous metal sulfonate detergent for lubricants. The sulfonate detergent is prepared by:

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Wappingers Falls, NY, United States of America

Brian L Papke