Exxon Research and Engineering Company

Exxon Chemical Patents, Inc.

Harold Shaub

Darrell W Brownawell

Antonio Gutierrez

Arthur DiBenedetto

Jack Ryer

Irwin L Goldblatt

Walter E Waddey

Paul Joseph Berlowitz

Jan Bock

Ricardo A Bloch

Alan Mark Schilowitz

David I Devore

Max J Wisotsky

Max Leo Robbins

Esther D Winans

Andrew James Ritchie

Stephen J Metro

Harold E Bachman

Yasuhiko Yoneto

Donald J Norris

Ian Peter Field

Howard S Homan

I-Ming Feng

Joseph M Pecoraro

Eric E Wigg

Barbara J Schaeffer

Kenneth S Kirschenbaum

Peter L Steyn

The combination of a molybdenum compound and an aromatic amine has been found to produce a synergistic antioxidant effect when used as an antioxidant additive for lubricating oils. The combination has been found to be particularly effective under catalytic oxidation conditions, e.g. Fe catalysed oxidation of crankcase lubricating oils.

Mixed antioxidant composition

Crankcase lubricant compositions for use in automobile or truck engines comprise a major amount of a lubricating oil, added copper present in oil-soluble form, at least 2 ppm of molybdenum present in oil-soluble form, and a total of from 0.05 to 2 mass % of one or more oil-soluble aromatic amines. The specified additives provide a highly effective antioxidant system.

Lubricating compositions with improved antioxidancy comprising added

The fuel economy of an internal combustion engine can be improved by adding to the lubricating oil used to lubricate the crankcase of said engine a synergistic blend of amine/amide and ester/alcohol friction modifying agents, for example, by reacting (a) a carboxylic acid, such as oleic acid and/or isostearic acid with an amine, such as diethylene triamine or tetraethylene pentamine, and (b) glycerine monooleate and/or glycerine monoricinoleate.

Synergistic blend of amine/amide and ester/alcohol friction modifying

NaOH can be used to remove hydroperoxides from a lubricating oil provided the oil contains a metal thiophosphate. This extends the useful life of the oil and the equipment being lubricated. In a preferred embodiment, the NaOH is immobilized within the lubrication system of an internal combustion engine.

Method of removing hydroperoxides from lubricating oils using sodium

Hydroperoxides can be removed from a lubricating oil by contacting the oil passing through an oil filter with a heterogenous hydroperoxide decomposer. This extends the useful life of the oil and the equipment being lubricated. In a preferred embodiment, the hydroperoxide decomposer is incorporated on a substrate immobilized within the lubrication system of an internal combustion engine.

Filter for removing hydroperoxides from lubricating oils

Hydroperoxides can be removed from a lubricating oil by contacting the oil with a heterogenous hydroperoxide decomposer. This extends the useful life of the oil and the equipment being lubricated. In a preferred embodiment, the hydroperoxide decomposer is incorporated on a substrate immobilized within the lubrication system of an internal combustion engine.

Method of removing hydroperoxides from lubricating oils

Removal of carcinogenic hydrocarbons from used lubricating oil using

Distillate fuel compositions containing mono alkyl substituted derivatives of thiadiazole are effective in reducing the formation of intake valve deposits in internal combustion engines. Mono alkyl substituted derivatives of 2,5-dimercapto-1,3,4-thiadiazole are preferred.

Distillate fuels containing mono alkyl substituted derivatives of

A lube oil and method of making same having improved anti-wear properties is described. The lube oil comprises:

Method of improving the anti-wear properties of a lube oil

Lube oil anti-wear agent

A lubricating oil composition having improved friction reducing properties and the method of reducing friction in internal combustion engines by lubricating said engines with said lubricating oil which contains an effective friction reducing amount of an additive which is the reaction product of dimer carboxylic acid and a polyhydric alcohol having at least 2 hydroxyl groups in combination with an oil soluble alkanol or an oil soluble alkyl phosphate.

Lubricant oil composition with improved friction reducing properties

A method and composition for obtaining improved friction reducing properties is provided by a lubricating oil composition and the lubrication of internal combustion engines with said composition which comprises an additive combination of an ester of a polycarboxylic acid with a glycol or glycerol and an ashless dispersant containing a high molecular weight aliphatic hydrocarbon oil solubilizing group attached thereto and a selected amount of free hydroxyl groups.

Method and lubricant composition for providing improved friction

A method of reducing fuel consumption in an automotive internal combustion engine which comprises operating said engine on gasoline hydrocarbon fuel containing an effective fuel reducing amount of a selected additive which is a hydroxyl-containing ester of a monocarboxylic acid and a glycol or trihydric alcohol, said ester additive having at least one free hydroxyl group.

Method for improving the fuel economy of an internal combustion engine

A lubricating oil composition having particularly improved friction reducing properties which comprises an ester of a polycarboxylic acid with a glycol or glycercol and a selected metal dithiocarbamate and contains a relatively low level of phosphorus.

Lubricant composition with improved friction reducing properties

A lubricating oil composition having improved friction reducing properties and the method of reducing friction in internal combustion engines by lubricating said engines with said lubricating oil which contains an effective friction reducing amount of an additive which is the reaction product of a dimer carboxylic acid and a polyhydric alcohol having at least three hydroxyl groups.

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Berkeley Heights, NJ, United States of America

Harold Shaub