Lubricity additives for fuels
AssigneesAfton Chemical Corporation, Shell Oil Company
InventorsWilliam Colucci, Joseph Calderone, Joseph Russo
Life of this patent
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Abstract
Fuel additive compositions that include synergistic mixtures of one or more neutral lubricity additives and one or more monoacidic lubricity additives to provide wear and/or friction reduction in fuels.
Claims27
A gasoline additive providing lubricity, the gasoline additive comprising a lubricity additive mixture of (i) at least one neutral lubricity additive prepared by reacting a hydrocarbyl-substituted succinic anhydride with ammonia wherein the hydrocarbyl substituent includes 8 to 20 carbons and (ii) at least one linear monocarboxylic acid or salt thereof having a carbon chain of 16 to 20 carbons, the linear monocarboxylic acid or salt thereof being saturated, unsaturated, or including mixtures thereof, and when (ii) is the at least one linear monocarboxylic acid, a weight ratio of (i) an amount of the at least one neutral lubricity additive divided by (ii) an amount of the at least one linear monocarboxylic acid is about 0.2 to about 5 and when (ii) is the at least one linear monocarboxylic acid salt, a weight ratio of (i) an amount of the at least one neutral lubricity additive divided by (ii) an amount of the at least one linear monocarboxylic acid salt is about 2 to about 27.8;
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- about 0.6 to about 10.8 PTB of (i) and about 0.3 to about 1.0 PTB of (ii) are used in a spark-ignitable fuel together.
A fuel comprising a major amount of a spark-ignitable fuel and a minor amount of a lubricity additive mixture, the fuel including (i) about 0.6 to about 10.8 PTB of at least one neutral lubricity additive prepared by reacting a hydrocarbyl-substituted succinic anhydride with ammonia wherein the hydrocarbyl substituent includes 8 to 20 carbons and (ii) about 0.3 PTB to about 1.0 PTB of at least one linear monocarboxylic acid or salt thereof having a carbon chain of 16 to 20 carbons, the linear monocarboxylic acid or salt thereof being saturated, unsaturated, or including mixtures thereof, and when (ii) is the at least one linear monocarboxylic acid, a weight ratio of (i) an amount of the at least one neutral lubricity additive divided by (ii) an amount of the at least one linear monocarboxylic acid is about 0.2 to about 5 and when (ii) is the at least one linear monocarboxylic acid salt, a weight ratio of (i) an amount of the at least one neutral lubricity additive divided by (ii) an amount of the at least one linear monocarboxylic acid salt is about 2 to about 30.
A method of reducing wear in a gasoline engine comprising operating the gasoline engine with a fuel including a major amount of gasoline and a minor amount of a lubricity additive mixture, the fuel including (i) about 0.6 to about 10.8 PTB of at least one neutral lubricity additive prepared by reacting a hydrocarbyl-substituted succinic anhydride with ammonia wherein the hydrocarbyl substituent includes 8 to 20 carbons and (ii) about 0.3 PTB to about 1.0 PTB of at least one linear monocarboxylic acid or salt thereof having a carbon chain of 16 to 20 carbons, the linear monocarboxylic acid or salt thereof being saturated, unsaturated, or including mixtures thereof, and when (ii) is the at least one linear monocarboxylic acid, a weight ratio of (i) an amount of the at least one neutral lubricity additive divided by (ii) an amount of the at least one linear monocarboxylic acid is about 0.2 to about 5 and when (ii) is the at least one linear monocarboxylic acid salt, a weight ratio of (i) an amount of the at least one neutral lubricity additive divided by (ii) an amount of the at least one linear monocarboxylic acid salt is about 2 to about 30.
Dependencies are inferred from the claim text.