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US 2006/0222584 A1Published application
Salts comprising cyanoborate anions
AssigneeMerck Patent GmbH
InventorsUrs Welz-Biermann, Nikolai (Mykola) Ignatyev, Eduard Bernhardt, Maik Finze, Helge Willner
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Abstract
A process for the preparation of alkali metal cyanoborates, the further conversion thereof into salts comprising cyanoborate anions and organic cations, these salts, and the use thereof as ionic liquids are described.
Claims23
Process for the preparation of alkali metal cyanoborates of the general formula (1)
- M+[B(CN)4]− (1),
- where M is selected from the group Li, Na, K, Rb and Cs,
- characterised in that an alkali metal tetrafluoroborate M[BF4], where M=Li, Na, K, Rb, Cs, is reacted with an alkali metal cyanide MCN, where M=Li, Na, K, Rb, Cs, in a solid-state reaction.
Process for the preparation of alkali metal cyanoborates of the general formula (2)
- M+[BFn(CN)4-n]− (2),
- wheren=0, 1, 2 or 3
- and M is selected from the group Li, Na, K, Rb and Cs,
- characterised in that an alkali metal cyanide MCN is reacted with boron trifluoride etherate BF3.OEt2.
1 more element
Salt of the general formula (3)
- Kt+[BFn(CN)4-n]− (3)
- where n=0, 1, 2 or 3, and Kt+ is an organic cation, with the proviso that the cation Kt+ is not [N(C4H9)4]+ for n=0.
Dependencies are inferred from the claim text.