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 compound of formula (I): (I) or an anhydride thereof; and an alcohol having at least 5 carbon atoms; wherein each of n and m may be 0 or a positive integer.
Claims13
A diesel fuel composition comprising as an additive the reaction product of a polycarboxylic acid compound
- or an anhydride thereof selected from itaconic acid, itaconic anhydride, 2-methylene glutaric acid, 2-methylene glutaric anhydride, 2-methylene adipic acid, 2-methylene adipic anhydride and isomers and/or mixtures thereof, and
- an alcohol selected from hexanol, octanol, nonanol, decanol, dodecanol, tetradecanol, cetyl alcohol, stearyl alcohol, 2-ethyl-1-butanol, 2-ethyl-1-hexanol, 2-ethyl-1-heptanol, 2-propylheptanol, 2-ethyl-1-decanol, 2-hexyl-1-decanol, 2-octyl-1-decanol, 2-hexyl-1-dodecanol, 2-octyl-1-dodecanol, 2-decyl-1-tetradecanol, isotridecanol, cyclohexanol, cyclooctanol, citronellol, oleyl alcohol, 9-decen-1-ol, cis-3-hexen-1-ol, trans-2-hexen-1-ol, 6-methyl-5-hepten-2-ol, 1-octen-3-ol, trans-2-octen-1-ol, and 10-undecen-1-ol;
- wherein the polycarboxylic acid compound and the alcohol are reacted in a molar ratio of from 2:1 to 1:2;
- and
- 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 compound
- or an anhydride thereof selected from itaconic acid, itaconic anhydride, 2-methylene glutaric acid, 2-methylene glutaric anhydride, 2-methylene adipic acid, 2-methylene adipic anhydride and isomers and/or mixtures thereof;
- and an alcohol selected from hexanol, octanol, nonanol, decanol, dodecanol, tetradecanol, cetyl alcohol, stearyl alcohol, 2-ethyl-1-butanol, 2-ethyl-1-hexanol, 2-ethyl-1-heptanol, 2-propylheptanol, 2-ethyl-1-decanol, 2-hexyl-1-decanol, 2-octyl-1-decanol, 2-hexyl-1-dodecanol, 2-octyl-1-dodecanol, 2-decyl-1-tetradecanol, isotridecanol, cyclohexanol, cyclooctanol, citronellol, oleyl alcohol, 9-decen-1-ol, cis-3-hexen-1-ol, trans-2-hexen-1-ol, 6-methyl-5-hepten-2-ol, 1-octen-3-ol, trans-2-octen-1-ol, and 10-undecen-1-ol;
- wherein the polycarboxylic acid compound and the alcohol are reacted in a molar ratio of from 2:1 to 1:2;
- and
- 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.