Ashless or reduced ash quaternary detergents
AssigneeThe Lubrizol Corporation
InventorsEwan E. Delbridge, Virginia A. Carrick, John K. Pudelski, Matthew D. Giesleman, Christopher L. Friend, Patrick E. Mosier, Michele M. Rogers, Mark T. Tierney
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Abstract
A composition of an oil-soluble ionic detergent that does not contribute metal ions to the composition, and which comprises a quaternary non-metallic pnictogen cation and an organic anion having at least one hydrocarbyl group of sufficient length to impart oil solubility to the detergent, the detergent having a total base number (TBN) to total acid number (TAN) ratio of at least 2:1 imparts ash-free basicity to a lubricant composition.
Claims11
A composition comprising an oil-soluble ionic detergent, which detergent comprises
- (a) a quaternary ammonium cation and
- (b) an organic anion having at least one aliphatic hydrocarbyl group of sufficient length to impart oil solubility to the detergent;
- said oil-soluble ionic detergent having a total base number (TBN) to total acid number (TAN) ratio of at least 2:1;
- wherein said oil-soluble ionic detergent exhibits a TBN of at least about 10 arising from a non-metallic base;
- wherein said oil-soluble ionic detergent comprises a stoichiometric excess of quaternary ammonium cations of (a) over organic anions of (b) such that said cations and anions are present in an equivalent ratio (a):(b) of at least about 2:1;
- and
- wherein the overbased detergent further comprises an additional oxo-anion which comprises a carbonate, bicarbonate, or hydroxide ion;
- wherein the cation comprises four groups selected from the group consisting of methyl groups, ethyl groups, propyl groups, butyl groups, benzyl groups, phenyl groups, hydroxyalkyl groups, aminoalkyl groups, and mixtures thereof.
Dependencies are inferred from the claim text.