Cyclic ortho ester fuel additive
AssigneeAirbus Operations GmbH
InventorsJoseph K-W Lam, Norman Ratcliffe, Benjamin De Lacy Costello, Sonia Repetto, James Costello, David Parmenter
Life of this patent
Estimating the term…
Abstract
The invention relates to liquid hydrocarbons containing cyclic ortho esters as dehydrating dehydrating icing inhibitors and to methods of using the compounds. The liquid hydrocarbons include fuels such aviation fuels, lubricants, hydraulic fluids and hydrocarbon solvents.
Claims25
A liquid hydrocarbon comprising a dehydrating icing inhibitor selected from Formula I and Formula II, salts thereof or mixtures thereof;
- where:
- R1 and R3 are independently selectable and are selected from a C1 to C6 substituted or non-substituted, branched or straight chain, alkyl or ether;
- R2 and R4 are independently selectable and are selected from a C1 to C7 substituted or non-substituted, straight or branched chain, alkyl;
- Y is independently selectable and is a substituted or non-substituted alkyl;
- y is an integer of 1 to 3;
- z is an integer of 2 to 6;
- and,
- wherein liquid hydrocarbon is a hydrocarbon fuel selected from an aviation fuel, gasoline, diesel and heating oil, a lubricant or a hydraulic fluid.
A liquid hydrocarbon comprising a dehydrating icing inhibitor selected from Formula I and Formula II, salts thereof or mixtures thereof;
- where:
- R1 and R3 are independently selectable and are selected from a C1 to C6 substituted or non-substituted, branched or straight chain, alkyl or ether;
- R2 and R4 are independently selectable and are selected from a C1 to C7 substituted or non-substituted, straight or branched chain, alkyl;
- Y is independently selectable and is a substituted or non-substituted alkyl;
- y is an integer of 1 to 3;
- z is an integer of 2 to 6;
- where the dehydrating icing inhibitor has a Formula III or Formula IV or a salt thereof;
- wherein R5 and R7 are hydrogen;
- and R6 and R8 are methyl, and wherein R6 and R8 may be cis or trans relative to each other.
A method of inhibiting ice crystal formation in a liquid hydrocarbon comprising mixing the liquid hydrocarbon with a compound selected from Formula I and formula II, or mixtures thereof:
- where:
- R1 and R3 are independently selectable and are selected from a C1 to C6 substituted or non-substituted, branched or straight chain, alkyl or ether;
- R2 and R4 are independently selectable and are selected from a Ci to C7 substituted or non-substituted, straight or branched chain, alkyl;
- Y is independently selectable and is a substituted or non-substituted alkyl;
- y is an integer of 1 to 3;
- z is an integer of 2 to 6.
A method of inhibiting ice crystal formation in a liquid hydrocarbon comprising mixing the liquid hydrocarbon with a compound selected from Formula I and formula II, or mixtures thereof:
- where:
- R1 and R3 are independently selectable and are selected from a C1 to C6 substituted or non-substituted, branched or straight chain, alkyl or ether;
- R2 and R4 are independently selectable and are selected from a C1 to C7 substituted or non-substituted, straight or branched chain, alkyl;
- Y is independently selectable and is a substituted or non-substituted alkyl;
- y is an integer of 1 to 3;
- z is an integer of 2 to 6;
- wherein in dehydrating icing inhibitor has a Formula III or Formula IV or a salt thereof;
- wherein R5 and R7 are hydrogen;
- and R6 and R8 are methyl, and wherein R6 and R8 may be cis or trans relative to each other.
A method of inhibiting ice crystal formation in a liquid hydrocarbon comprising mixing the liquid hydrocarbon with a 1,3-dioxolan-2-ylium salt.
A compound of Formula IV or a salt thereof;
- where:
- R3 is independently selectable and is selected from a C1 to C6 substituted or non-substituted,
- branched or straight chain, alkyl or ether;
- R4 is independently selectable and is selected from a C1 to C7 substituted or non-substituted,
- straight or branched chain, alkyl;
- z is an integer of 2 to 6;
- R5 and R7 are hydrogen;
- and R6 and R8 are methyl, and wherein R6 and R8 may be cis or trans relative to each other as a dehydrating icing inhibitor.
Dependencies are inferred from the claim text.