Water → 1,2,3,4-Tetramethylimidazolinium dimethyl phosphate

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Reaction Conditions

Reaction Steps

By adding trimethyl phosphate (TMP, produced by Daihachi Chemical Industries Co., Ltd.) (0.1 mol) to a methanol solution of 1,2,3,4-tetramethylimidazolinium methyl carbonate salt (0.1 mol) obtained in the same manner as Example 1, adding water (0.3 mol) and stirring the mixture at 100° C. for 20 hours, the trimethyl phosphate was hydrolyzed and, at the same time, a salt exchange reaction was performed. As a result, a methanol solution of 1,2,3,4-tetramethylimidazolinium dimethyl phosphate monoanion was obtained. The resulting solution was heated at a pressure reduction degree of 1.0 kPa or less at 50° C., so that methanol was evaporated until methanol was no longer distilled off. By increasing the temperature from 50° C. to 100° C. and heating the mixture for 30 minutes to distill by-products off, an electrolyte (c5) {1,2,3,4-tetramethylimidazolinium dimethyl phosphate monoanion} was obtained. The yield was 99 wt %. The content of dimethyl phosphoric acid monoanion in the anions was 99% by mol.

Provenance & Evidence