Chevron Research Company

Chevron Research & Technology Company

Thomas V Liston

Vernon R Small

Anatoli Onopchenko

Warren Lowe

Elaine S Yamaguchi

Timothy R Erdman

Borated alkyl catechols can be stabilized by the addition of certain defined dialkylamines. Lubricating oils containing a borated alkyl catecholdialkylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.

Dialkylamine complexes of borated alkyl catechols and lubricating oil

Borated alkyl catechols having a 3:2 mole ratio of catechol to boron can be stabilized by the addition of certain defined trialkylamines. Lubricating oils containing a 3:2 borated alkyl catechol-trialkylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.

Trialkylamine complexes of certain borated alkyl catechols and

Lubricating oils containing a borated alkyl catechol-dialkylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.

Dialkylamine complexes of borated higher carbon number alkyl catechols

Borated alkyl catechols can be stabilized by the addition of certain defined monoalkylamines. Lubricating oils containing a borated alkyl catechol-monoalkylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.

Monoalkylamine complexes of borated higher carbon number alkyl catechols

Borated alkyl catechols having a 3:2 mole ratio of alkyl catechol to boron can be stabilized by the addition of certain defined trialkylamines. Lubricating oils containing a 3:2 borated alkyl catechol-trialkylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.

Trialkylamine complexes of borated higher carbon number alkyl catechols

Borated alkyl catechols can be stabilized by the addition of certain defined monoalkylamines. Lubricating oils containing a borated alkyl catecholmonoalkylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.

Monoalkylamine complexes of borated alkyl catechols and lubricating oil

A method of preparing a borated alkylcatechol by first reacting catechol with boric acid and thereafter alkylating with an olefin.

Method of preparing borated alkyl aromatic polyols

Lubricating oils containing a borated alkyl catechol-diethylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.

Diethylamine complexes of borated alkyl catechols and lubricating oil

The present invention is directed toward a method for preparing Group II metal overbased sulfurized alkylphenols. In particular, the present invention employs a sulfurization catalyst in the preparation of Group II metal overbased sulfurized alkylphenols. Use of a sulfurization catalyst in this preparation results in a product generally characterized as having lower crude sediment, a higher Total Base Number and lower viscosity than a similar product prepared without using a sulfurization catalyst.

Methods for preparing, group II metal overbased sulfurized alkylphenols

Borated alkyl catechols can be stabilized by the addition of diethylamine. Lubricating oils containing a borated alkyl catecholdiethylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.

The present invention is directed toward a method for preparing Group II metal overbased sulfurized alkylphenols. In particular, the present invention employs a sulfurization catalyst in the preparation of Group II metal overbased sulfurized alkylphenols. Use of a sulfurization catalyst in this peparation results in a product generally characterized as having lower crude sediment, a high Total Base Number and lower viscosity than a similar product prepared without using a sulfurization catalyst.

Methods for preparing, Group II metal overbased sulfurized alkylphenols

Metal salts of alkyl catechol esters of dithiophosphoric acid suitable as additives in oil compositions are disclosed. Oil compositions containing the salts of such esters show improved extreme pressure/anti-wear and anti-oxidant properties.

Metal salts of alkyl catechol dithiophosphoric acids and oil

The anti-wear properties of lubricating oil compositions containing overbased calcium sulfonate are improved when a metal salt of an alkyl catechol ester of dithiophosphoric acid is added to the oil. Oil compositions containing this combination are useful as crankcase lubricants.

Lubricating oil compositions containing overbased calcium sulfonates and

This invention relates to normally liquid lubricating oil additives which provide both antioxidant and friction-modifying properties when added to lubricating oil. In particular, this invention relates to C.sub.18 to C.sub.24 alkyl catechol lubricating oil additives which are normally liquid at typical storage temperatures.

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San Rafael, CA, United States of America

Thomas V Liston