Ashless or reduced ash quaternary detergents
AssigneeThe Lubrizol Corporation
InventorsEwan E. Delbridge, Virginia A. Carrick, John K. Pudelski, Matthew D. Gieselman, Christopher L. Friend, Patrick E. Mosier, Michelle 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.
Claims13
A composition comprising an oil-soluble ionic detergent, which detergent comprises
- (a) a quaternary non-metallic pnictogen 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.
A method for preparing an oil-soluble ionic detergent, comprising the steps of:
- (a) reacting a tertiary amine with a dihydrocarbyl carbonate to form a quaternary ammonium carbonate;
- and
- (b) reacting the quaternary ammonium carbonate with an oil-soluble acidic substrate having at least one aliphatic hydrocarbyl group of sufficient length to impart oil solubility to the detergent.
A method for preparing an oil-soluble ionic detergent, comprising the steps of:
- (a) providing an oil-soluble acidic substrate having at least one aliphatic hydrocarbyl group of sufficient length to impart oil solubility to the detergent, optionally in an organic solvent and optionally in the presence of a C1 to C6 alcohol;
- (b) admixing with said acidic substrate a molar excess of a basic compound comprising a quaternary ammonium or quaternary phosphonium compound;
- and
- (c) optionally reacting the resulting mixture with an oxo-acid.
Dependencies are inferred from the claim text.