Infineum International Limited

Other

Peter J Dowding

Peter D Watts

Richard D Bertram

Christopher John Adams

Elin J Eis

Joseph P Hartley

Elin Eis

Joseph Hartley

A metal-containing detergent, suitable for use as a lubricant additive, in the form of a concentrate in oil in which a basic metal-containing material is maintained in dispersion or solution in the oil by a gemini surfactant system comprising, or being derivable or derived from, a double bond-unsaturated carboxylic acid having 8 to 30 carbon atoms, the double bond or bonds of which being functionalized to carry polar groups across or on the double bond or bonds and the carboxylic acid group or groups thereof being functionalized to become an amide or ester group carrying at least one alkyl group having 4 to 20 carbon atoms.

Lubricating oil additives

A lubricating oil composition comprising a Group II basestock and a neutral or overbased metal hydrocarbyl-substituted hydroxybenzoate detergent having a basicity index of less than 2.

Lubricating oil composition

Trunk piston marine engine lubrication, when the engine is fueled by heavy fuel oil, is effected by a composition comprising a major amount of an oil of lubricating viscosity containing at least 50 mass % of a Group II basestock, and respective minor amounts of an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent other than such a detergent having a basicity index of less than two and a degree of carbonation of 80% or greater and 5 to 500 mass %, based on the mass of the detergent, of an oil-soluble alkyl-substituted phenol other than a hindered phenol. Asphaltene precipitation in the lubricant, caused by the presence of contaminant heavy fuel oil, is prevented or inhibited.

Marine engine lubrication

A detergent including one or more neutral or overbased alkaline earth metal Cto Chydrocarbyl substituted hydroxybenzoates, in which:

[object Object]

A method of reducing asphaltene precipitation or 'black paint' in an engine is disclosed. The method includes the step of lubricating the engine with a lubricating oil composition comprising: an oil of lubricating viscosity in a major amount; and, a salicylate detergent system in a minor amount comprising one or more neutral or overbased alkaline earth metal Chydrocarbyl substituted salicylates.

Method of reducing asphaltene precipitation in an engine utilizing a C22 hydrocarbyl salicylate

An overbased metal sulphonate detergent having incorporated therein at least one friction modifier including at least one amine group.

Overbased metal sulphonate detergent

An overbased metal hydrocarbyl-substituted hydroxybenzoate detergent having a basicity index of less than 2 and a degree of carbonation of 80% or greater is disclosed. The overbased metal hydrocarbyl-substituted hydroxybenzoate detergent reduces asphaltene precipitation or 'black paint' in a marine diesel engine.

Detergent

A lubricating oil composition comprising oil of lubricating viscosity and an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent manufactured in the presence of an amine- or ester-based friction modifier.

A method of improving the compatibility of an overbased detergent with other additives in a lubricating oil composition. The method includes the step of adding an oil-soluble, hydrocarbyl sulphonic acid to the detergent.

Growing community of inventors

Wantage, United Kingdom

Peter J Dowding