Patent ID: 8461382

Claim:
An ionic liquid of the general formula 1 /n[X n+ ][Y − ] having a melting point of less than 100° C., where n is 1, 2 or 3 and the cation X n+ is a cation selected from the group consisting of metal ions, quaternary ammonium, oxonium, sulfonium and phosphonium ions, the anion Y − has the general formula (II) R 6 O—(R 7 —O—) x —R 8 —COO − (II), where x is from 2 to 8, R 6 is a 1 to 3 carbon atom branched or unbranched hydrocarbon group, the radicals R 7 are each, independently of one another, a 2 to 4 carbon atom branched or unbranched alkylenic group and R 8 is a 1 to 4 carbon atom branched or unbranched alkylenic group, and the hydrogen atoms in the radicals R 6 , R 7 and R 8 can in each case be completely or partly replaced by fluorine.