Detergent
AssigneeInfineum International Limited
InventorsRichard D. Bertram, Peter J. Dowding, Peter D. Watts
Life of this patent
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Abstract
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.
Claims11
An overbased metal hydrocarbyl-substituted hydroxybenzoate detergent having a basicity index of less than 2 and a degree of carbonation of 80% or greater, wherein the degree of carbonation is the percentage of carbonate present in the overbased metal hydrocarbyl-substituted hydroxybenzoate detergent expressed as a mole percentage relative to the total excess base in the detergent.
A lubricating oil composition including an oil of lubricating viscosity and an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent having a basicity index of less than 2 and a degree of carbonation of 80% or greater, wherein the degree of carbonation is the percentage of carbonate present in the overbased metal hydrocarbyl-substituted hydroxybenzoate detergent expressed as a mole percentage relative to the total excess base in the detergent.
A method of reducing asphaltene precipitation or ‘black paint’ in an engine, the method including the step of lubricating the engine with a lubricating oil composition including an overbased metal hydrocarbyl-substituted hydroxybenzoate detergent having a basicity index of less than 2 and a degree of carbonation of 80% or greater, wherein the degree of carbonation is the percentage of carbonate present in the overbased metal hydrocarbyl-substituted hydroxybenzoate detergent expressed as a mole percentage relative to the total excess base in the detergent.
Dependencies are inferred from the claim text.