Fuel oils
AssigneeInfineum International Limited
InventorsAndrew C. Sutkowski, Graham Jackson
Life of this patent
Estimating the term…
Abstract
The use of an additive composition to improve the conductivity of a fuel oil. The additive composition comprises a polymeric condensation product formed by the reaction of an aliphatic aldehyde or ketone, or a reactive equivalent, with at least one ester of p-hydroxybenzoic acid.
Claims9
A method for improving the conductivity of a fuel oil composition, which method comprises blending a fuel oil with an additive composition, wherein the additive composition comprises a polymeric condensation product formed by a reaction of an aliphatic aldehyde or ketone, or a reactive equivalent, with at least one ester of p-hydroxybenzoic acid selected from the group consisting of (i) a straight or branched chain C1-C7 alkyl ester of p-hydroxybenzoic acid;
- (ii) a branched chain C8-C16 alkyl ester of p-hydroxybenzoic acid, and;
- (iii) a mixture of long chain C8-C18 alkyl esters of p-hydroxybenzoic acid, at least one of said alkyls being branched.
A method for improving the conductivity of a fuel oil composition, which method comprises blending a fuel oil with an additive composition, wherein the additive composition comprises (a) from 0.1 to 500 ppm of a polymeric condensation product formed by a reaction of an aliphatic aldehyde or ketone, or a reactive equivalent, with at least one ester of p-hydroxybenzoic acid selected from the group consisting of (i) a straight or branched chain C1-C7 alkyl ester of p-hydroxybenzoic acid;
- (ii) a branched chain C8-C16 alkyl ester of p-hydroxybenzoic acid, and (iii) a mixture of long chain C8-C18 alkyl esters of p-hydroxybenzoic acid, at least one of said alkyls being branched;
- and (b) from 0.1 to 500 ppm of a co-additive comprising a copolymer or terpolymer of methacrylic or acrylic acid esters of alcohols having about 1 to 40 carbon atoms, wherein at least one of the methacrylic or acrylic acid ester monomers is a nitrogen-containing, amine-containing or amide containing derivative.
Dependencies are inferred from the claim text.