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US 2011/0257433 A1Published application
Liquids
AssigneeThe University of York
InventorAdam John Walker
Life of this patent
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Abstract
The present invention relates to an ionic liquid comprising an anion and a cation, wherein the cation is a primary, secondary or tertiary ammonium ion containing a protonated nitrogen atom.
Claims18
An ionic liquid comprising an anion and a cation characterised in that the cation is a nitrogen-containing cation of the formula (I)
- N+HRR′R″ (1)
- wherein:
- R is a hydrocarbyl group optionally interrupted by one or more ether or thioether linkages, and optionally substituted with one or more substituents selected from nitrogen-containing functional groups, alkyl, alkenyl, alkoxy, hydroxy, carbonyl and carboxyl groups;
- or from thiol, alkythio, sulphonyl, thiocyanate, isothiocyanate, azido, hydrazino, halogen, boronate and silyl groups;
- R′ and R″, which may be the same or different, each represent H or a hydrocarbyl group optionally interrupted by one or more ether or thioether linkages, and optionally substituted with one or more substituents selected from nitrogen-containing functional groups, alkyl, alkenyl, alkoxy, hydroxy, carbonyl and carboxyl groups;
- or from thiol, alkythio, sulphonyl, thiocyanate, isothiocyanate, azido, hydrazino, halogen, boronate and silyl groups;
- and
- any two or three of R, R′ and R″ may be joined together with the N to form a cyclic group.
5 more elements
A process for the preparation of an ionic liquid, the process comprising the steps of:
- (i) providing a nitrogen-containing compound of the formula (II)
- NRR′R″ (II)
- in which R is a hydrocarbyl group optionally interrupted by one or more ether or thioether linkages, and optionally substituted with one or more substituents selected from nitrogen-containing functional groups, alkyl, alkenyl, alkoxy, hydroxy, carbonyl and carboxyl groups;
- or from thiol, alkythio, sulphonyl, thiocyanate, isothiocyanate, azido, hydrazino, halogen, boronate and silyl groups;
- and wherein
- R′ and R′″, which may be the same or different, each represent H or a hydrocarbyl group optionally interrupted by one or more ether or thioether linkages, and optionally substituted with one or more substituents selected from:
- nitrogen-containing functional groups;
- alkyl, alkenyl, alkoxy, hydroxy;
- carbonyl and carboxyl groups;
- or from thiol, alkythio, sulphonyl, thiocyanate, isothiocyanate, azido, hydrazino, halogen, boronate and silyl groups;
- or wherein any two or three of R, R′ and R″ may be joined together with the N to form a cyclic group;
- and
- (ii) neutralising the compound in (i) with an acid.
10 more elements
Dependencies are inferred from the claim text.