Low molecular weight amide/ester containing quaternary ammonium salts
AssigneeThe Lubrizol Corporation
InventorsDavid J. Moreton, Paul R. Stevenson, Hannah Greenfield, David C. Arters, James H. Bush, Paul E. Adams
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Abstract
The present technology is related to amide or ester containing quaternary ammonium salts having a hydrocarbyl substituent of number average molecular weight ranging from 300 to 750, and the use of such quaternary ammonium salts in fuel compositions to improve the water shedding performance of the fuel composition.
Claims9
A diesel fuel composition comprising 5 to 100 ppm of an ester or amide containing quaternary ammonium salt (“amide/ester quat”), wherein the amide/ester quat comprises the reaction product of:
- a) a quaternizable compound that is the reaction product of:
- (i) a hydrocarbyl-substituted acylating agent, wherein the hydrocarbyl-substituent has a number average molecular weight ranging from 300 to 750, and comprises at least one polyisobutenyl succinic anhydride or polyisobutenyl succinic acid;
- and
- (ii) a nitrogen containing compound having an oxygen or nitrogen atom capable of reacting with said hydrocarbyl-substituted acylating agent to form an ester or amide, and further having at least one quaternizable amino group;
- and
- b) a quaternizing agent suitable for converting the quaternizable amino group of the nitrogen containing compound to a quaternary nitrogen;
- and
- 5 to 50 ppm of a demulsifier.
The composition of any previous claim, wherein the quaternizing agent comprises at least one dialkyl sulfate, alkyl halide, hydrocarbyl substituted carbonate, hydrocarbyl epoxide, carboxylate, alkyl ester, or mixtures thereof.
A method of improving water shedding performance of a fuel composition comprising employing a composition comprising adding to the diesel fuel 5 to 1000 ppm of an amide/ester containing quaternary ammonium salt (“amide/ester quat”), wherein the amide/ester quat comprises the reaction product of:
- a) a quaternizable compound that is the reaction product of:
- (i) a hydrocarbyl-substituted acylating agent, wherein the hydrocarbyl-substituent has a number average molecular weight ranging from 300 to 750, and comprises at least one polyisobutenyl succinic anhydride or polyisobutenyl succinic acid;
- and
- (ii) a nitrogen containing compound having an oxygen or nitrogen atom capable of reacting with said hydrocarbyl-substituted acylating agent to form an ester or amide, and further having at least one quaternizable amino group;
- and
- b) a quaternizing agent suitable for converting the quaternizable amino group of the nitrogen containing compound to a quaternary nitrogen;
- and
- to 50 ppm of a demulsifier.
Dependencies are inferred from the claim text.