Compositions
AssigneeShell Oil Company
InventorsMark Lawrence Brewer, Roger Francis Cracknell, Tor Kit Goh
Life of this patent
Estimating the term…
Abstract
Additive composition for use in a fuel or lubricant formulation, comprising an active substance 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 fuel or lubricant formulation comprising the additive composition, a premix for use in preparing the additive composition, and the use of a modified cyclodextrin (I) as a vehicle for an active substance in an additive composition or in a fuel or lubricant formulation.
Claims11
A gasoline formulation comprising the additive composition comprising a cyclodextrin inclusion complex containing:
- (i) an active substance;
- 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 active substance being present as a guest molecule within a host molecule of the modified cyclodextrin (I), in the form of an inclusion complex.
A method comprising:
- introducing an additive composition in a gasoline formulation into a gasoline formulation consuming system, wherein the additive composition comprises a cyclodextrin inclusion complex containing:
- (i) an active substance;
- 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 active substance 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 to a condition which induces at least partial release of the active substance from the inclusion complex.
An additive composition for use in a gasoline formulation comprising a cyclodextrin inclusion complex containing:
- (i) an active substance;
- (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 active substance being present as a guest molecule within a host molecule of the modified cyclodextrin (I), in the form of an inclusion complex;
- and
- (iii) one or more carriers which are suitable for use in a fuel or lubricant formulation.
Dependencies are inferred from the claim text.