Exxon Chemical Patents, Inc.

Infineum USA LP

Exxon Research and Engineering Company

Exxon Chemical Company

Infineum International Limited

John A Cleverley

John F Marsh

Charles Herbert Bovington

Dominique Moulin

Edward Ira Stiefel

Jonathan Martin McConnachie

Philip Skinner

Jeremy Roger Spencer

Tuncel Ibrahim

Christopher John Adams

Ronald P Wangner

Alisdair J Brown

Joseph M Swietlik

Velautha-Cumaran Arunasalam

Ian A W Bell

Robert A Wardle

Dennis J Simpkin

Jose M G Gomes

Gaynor M Miasik

Ian A Bell

Jane Rachel Galsworthy

Rudi Ter Haar

Phillip Skinner

An overbased metal detergent having friction-modifying properties comprises colloidal inorganic base particles stably dispersed in an oil of lubricating viscosity. The colloidal particles constitute from 15 to 40 mass % of the detergent, and a stabilizing system constitutes from 20 to 45 mass % thereof, the balance being the oil of lubricating viscosity. The stabilizing system is the mixture obtained by combining an oil-soluble detergent component and from 25 to 75 mass % of an aliphatic amide having from 10 to 30 carbon atoms.

Overbased metal detergents

A lubricating oil composition is provided comprising a major amount of an oil of lubricating viscosity and a minor amount of, as an additive, at least one compound comprising a trinuclear tungsten core and bonded thereto a ligand or ligands capable of rendering the compound oil-soluble or oil-dispersible.

Lubricating oil compositions

A lubricating oil composition is provided comprising a major amount of an oil of lubricating viscosity and a minor amount of, as an additive, at least one compound comprising a metal core and bonded thereto one or more ligands capable of rendering the compound oil-soluble or oil-dispersible, at least one ligand having at least two hydrocarbyl groups of which one has 1 to 7 carbon atoms and the other or another has more carbon atoms.

Magnesium low base number (LBN) sulphonates derived from high molecular weight sulphonic acids have low viscosity and are chloride free. The magnesium low base number sulphonates are not skin sensitisers. In their preparation neutralisation of high molecular weight sulphonic acids or partially neutralised soaps of high molecular weight sulphonic acids is completed by the use of a high base number sulphonate in conjunction with a carboxylic acid. The process does not require the use of chloride containing promoters and produces low chloride products.

Magnesium low rate number sulphonates

Magnesium low base number sulphonates

Preparation of overbased magnesium sulphonates

A magnesium phenate is prepared by a process which comprises reacting (1) magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium bicarbonate or a magnesium carboxylate with (2) a phenol, a methylene bis-phenol or a sulphurised phenol in the presence of (3) a solvent comprising an organic compound containing one or more alcoholic hydroxyl groups e.g. an alkoxy alcohol and (4) a promoter selected from a ketone, diketone such as .alpha. or .beta. diketone, aldehyde or carboxylic acid and (5) optionally a diluent oil. This magnesium phenate may be used as a detergent for a lubricating oil.

Magnesium phenate detergents

A process for making an oil solution of a highly basic alkali metal compound which comprises

Overbased alkali metal additives

A highly basic lithium sulphonate, having a TBN of at least 250 mgKOH/g is prepared by heating a mixture of lithium hydroxide monohydrate and a solvent to remove water as an azeotrope of water and said solvent prior to formation of the lithium salt of the sulphonic acid and subsequently overbasing with carbon dioxide.

Overbased additives

Oil soluble basic magnesium sulphonates useful as lubricating oil additives are prepared by blowing carbon dioxide through a mixture of sulphonic acid or its sulphonate, magnesium oxide, a hydrocarbon solvent, water, a C.sub.3 to C.sub.6 ketone and a reaction promoter.

Basic alkaline earth metal sulphonates

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Didcot, United Kingdom

John A Cleverley