Ester compound of a polyol and fatty acid oligomer for use as a cold flow improver in fuel compositions
AssigneeDupont Nutrition Biosciences Aps
InventorsJens Mogens Nielsen, Maja Duelund, Kirsten Braüner Nygaard, Allan Torben Bech, Flemming Vang Sparsø
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Abstract
The present invention provides a compound as a cold flow improver for a fuel composition, said compound being an ester of (i) a polyol wherein the polyol is selected from at least pentaerythritol, polymers thereof and mixtures thereof; and (ii) a fatty acid oligomer, wherein the fatty acid oligomer has a degree of polymerisation from 2 to 7. The ester compound can be used for reducing, preventing or inhibiting cold filter plugging in a diesel engine.
Claims24
A compound which is an ester of
- (i) a polyol wherein the polyol is selected from at least pentaerythritol, polymers thereof and mixtures thereof;
- and
- (ii) a fatty acid oligomer, wherein the fatty acid oligomer has a degree of polymerisation of from 2 to 7.
A fuel composition comprising:
- (a) a fuel;
- (b) a compound which is an ester of
- (I) a polyol wherein the polyol has at least three hydroxyl groups;
- and
- (II) a fatty acid oligomer, wherein the fatty acid oligomer has a degree of polymerisation from 2 to 7, and wherein the fatty acid oligomer is prepared from a mixture of at least
- (i) a saturated fatty acid having a hydroxyl group on the carbon chain of the fatty acid,
- (ii) an unsaturated fatty acid having a hydroxyl group on the carbon chain of the fatty acid.
A process for reducing, preventing or inhibiting cold filter plugging in a diesel engine, comprising the step of:
- dosing a fuel with a compound which is an ester of
- (I) a polyol wherein the polyol has at least three hydroxyl groups;
- and
- (II) a fatty acid oligomer, wherein the fatty acid oligomer has a degree of polymerisation from 2 to 7, and wherein the fatty acid oligomer is prepared from a mixture of at least
- (i) a saturated fatty acid having a hydroxyl group on the carbon chain of the fatty acid,
- (ii) an unsaturated fatty acid having a hydroxyl group on the carbon chain of the fatty acid.
24-25. (canceled)
Dependencies are inferred from the claim text.