Additives and fuel oil compositions
AssigneeExxon Chemical Patents Inc.
InventorsBrid Dillworth, Rinaldo Caprotti
Life of this patent
Estimating the term…
Abstract
An additive composition comprising: (a) an ashless dispersant comprising an acylated nitrogen compound; and (b) a carboxylic acid, or an ester of the carboxylic acid and an alcohol wherein the acid has from 2 to 50 carbon atoms and the alcohol has one or more carbon atoms, which provides an improvement in the lubricity of fuel oils and exhibits improved solubility in the fuel oil.
Claims17
A diesel fuel oil composition comprising a major amount of a diesel fuel oil containing not more than 0.05% by weight of sulphur and having a 95% distillation point of not greater than 350.degree. C., and a minor amount of a lubricity additive composition consisting essentially of (a) an ashless dispersant comprising an acylated nitrogen compound and (b) a polycarboxylic acid, wherein the acid has from 2 to 50 carbon atoms, and wherein the ratio of component (a):
- component (b), calculated on a weight:weight basis, is in the range of greater than 1:100 to 2:1.
A method of improving the lubricity performance of a diesel fuel oil containing not more than 0.05% by weight of sulphur and having a 95% distillation point of not greater than 350.degree. C., the method comprising adding to the diesel fuel oil a lubricity improving amount of a lubricity additive wherein the lubricity additive consists essentially of (a) an ashless dispersant comprising an acylated nitrogen compound and (b) a Polycarboxylic acid, wherein the acid has from 2 to 50 carbon atoms, wherein the ratio of component (a):
- component (b), calculated on a weight:weight basis, is in the range of greater than 1:100 to 2:1.
Dependencies are inferred from the claim text.