Compositions and methods and uses relating thereto
AssigneeInnospec Limited
InventorsAlan Norman Ross, Martin Roberts, Alexander Smith
Life of this patent
Estimating the term…
Abstract
A fuel composition comprising as an additive the reaction product of a polycarboxylic acid having no more than 5 carbon atoms per carboxylic acid group, or an anhydride thereof and an alcohol having at least 5 carbon atoms.
Claims14
A diesel fuel composition comprising as an additive the reaction product of a polycarboxylic acid or an anhydride thereof and an alcohol, wherein the polycarboxylic acid or anhydride thereof is selected from, itaconic acid, citraconic acid, 2-methylene glutaric acid, 2-methylene adipic acid, isocitric acid, 2-hydroxycitric acid, malic acid, tartaric acid, 2-hydroxyadipic acid, 2-hydroxyglutaric acid, aconitic acid, and anhydrides and/or isomers thereof, and the alcohol is selected from cetyl alcohol, stearyl alcohol, 2-hexyl-1-decanol, 2-octyl-1-decanol, 2-hexyl-1-dodecanol, 2-octyl-1-dodecanol, 2-decyl-1-tetradecanol, and oleyl alcohol;
- wherein the polycarboxylic acid compound and the alcohol are reacted in a molar ratio of from 2:1 to 1:2;
- wherein the additive is present in the diesel fuel composition in an amount of 5 to 1,000 ppm by weight;
- and
- wherein the diesel fuel composition comprises less than 50 ppm sulphur by weight.
A method of improving the performance of a modern diesel engine having a high pressure fuel system by combating deposits in the engine, the method comprising combusting in the diesel engine a diesel fuel composition comprising as an additive the reaction product of a polycarboxylic acid or an anhydride thereof and an alcohol, wherein the polycarboxylic acid or anhydride thereof is selected from citric acid, itaconic acid, citraconic acid, 2-methylene glutaric acid, 2-methylene adipic acid, isocitric acid, 2-hydroxycitric acid, malic acid, tartaric acid, 2-hydroxyadipic acid, 2-hydroxyglutaric acid, aconitic acid, and anhydrides and/or isomers thereof and the alcohol is selected from cetyl alcohol, stearyl alcohol, 2-hexyl-1-decanol, 2-octyl-1-decanol, 2-hexyl-1-dodecanol, 2-octyl-1-dodecanol, 2-decyl-1-tetradecanol, and oleyl alcohol;
- wherein the polycarboxylic acid compound and the alcohol are reacted in a molar ratio of from 2:1 to 1:2;
- wherein the additive is present in the diesel fuel composition in an amount of 5 to 1,000 ppm by weight;
- and
- wherein the diesel fuel composition comprises less than 50 ppm sulphur by weight.
Dependencies are inferred from the claim text.