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.
Claims5
A diesel fuel composition comprising 5 to 60 ppm of an amide containing quaternary ammonium salt (“amide quat”), wherein the amide 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 400 to 600, and comprises at least one polyisobutenyl succinic anhydride or polyisobutenyl succinic acid;
- and
- ii) a nitrogen containing compound comprising dimethylaminopropylamine, N,N-dimethyl-aminopropylamine, N,N-diethyl-aminopropylamine, N,N-dimethyl-aminoethylamine, or mixtures thereof;
- and
- b) a quaternizing agent that is propylene oxide,
- wherein the water shedding performance of the diesel fuel is improved as compared to the same diesel fuel comprising an amide quat prepared from a hydrocarbyl-substituted acylating agent with a hydrocarbyl-substituent having a number average molecular weight outside the range of 400 to 600.
A method of improving water shedding performance of a fuel composition comprising employing a composition comprising adding to the fuel composition 5 to 60 ppm of an amide containing quaternary ammonium salt (“amide quat”), wherein the amide 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 400 to 600, and comprises at least one polyisobutenyl succinic anhydride or polyisobutenyl succinic acid;
- and
- ii) a nitrogen containing compound comprising dimethylaminopropylamine, N,N-dimethyl-aminopropylamine, N,N-diethyl-aminopropylamine, N,N-dimethyl-aminoethylamine, or mixtures thereof;
- and
- b) a quaternizing agent that is propylene oxide,
- wherein the water shedding performance of the diesel fuel is improved as compared to the same diesel fuel comprising an amide quat prepared from a hydrocarbyl-substituted acylating agent with a hydrocarbyl-substituent having a number average molecular weight outside the range of 400 to 600.
Dependencies are inferred from the claim text.