Compositions
AssigneeShell Oil Company
InventorsMark Lawrence Brewer, Roger Francis Cracknell, Tor Kit Goh
Life of this patent
Estimating the term…
Abstract
An additive composition for use in a diesel fuel formulation, comprising a cetane improver in an inclusion complex with a modified cyclodextrin of formula (I): wherein n is an integer from 6 to 20, and R1, R2 and R3 are each independently selected from hydrogen, optionally substituted alkyl, optionally substituted aryl and carbonyl, provided that R1, R2 and R3 are not all hydrogen. Also provided is a diesel fuel formulation comprising the additive composition, and the use of a modified cyclodextrin (I) as a vehicle for a cetane improver in an additive composition or diesel fuel formulation.
Claims14
A diesel fuel formulation comprising an additive composition comprising a cyclodextrin inclusion complex containing:
- (i) a cetane improver;
- and (ii) a modified cyclodextrin of formula (I):
- wherein n is an integer from 6 to 20, and R1, R2 and R3 are each independently selected from hydrogen, optionally substituted alkyl, optionally substituted aryl and carbonyl, provided that R1, R2 and R3 are not all hydrogen,
- the cetane improver being present as a guest molecule within a host molecule of the modified cyclodextrin (I), in the form of an inclusion complex.
A method of introducing a cetane improver to a diesel fuel formulation comprising providing a modified cyclodextrin of formula (I)
- wherein n is an integer from 6 to 20, and R1, R2 and R3 are each independently selected from hydrogen, optionally substituted alkyl, optionally substituted aryl and carbonyl, provided that R1, R2 and R3 are not all hydrogen, as a vehicle for a cetane improver in a diesel fuel formulation.
A method comprising:
- introducing an additive composition in a diesel fuel formulation into a diesel fuel-consuming system, wherein the additive composition comprises a cyclodextrin inclusion complex containing:
- (i) a cetane improver;
- and (ii) a modified cyclodextrin of formula (I):
- wherein n is an integer from 6 to 20, and R1, R2 and R3 are each independently selected from hydrogen, optionally substituted alkyl, optionally substituted aryl and carbonyl, provided that R1, R2 and R3 are not all hydrogen,
- the cetane improver being present as a guest molecule within a host molecule of the modified cyclodextrin (I), in the form of an inclusion complex;
- and
- subsequently subjecting the composition or formulation to a condition which induces at least partial release of the cetane improver from the inclusion complex which it forms with the modified cyclodextrin (I).
Dependencies are inferred from the claim text.