摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a hydrophilic ion liquid, which enables production of a hydrophilic ion liquid containing no halogen such as chlorine at a low cost.SOLUTION: The hydrophilic ion liquid is produced by carrying out an addition reaction step, a neutralization step, and a removal step. In the addition reaction step, an alkylene oxide is added to an amine in an aqueous solvent. This makes it possible to obtain a quaternary ammonium ion having a hydroxide ion as a counter anion. In the neutralization step, a reaction mixture after the addition reaction step is neutralized with an acid. In the removal step, there are removed water generated as a by-product after the neutralization step and the aqueous solvent. |