Process for the preparation of N-alkyl-N'-methylimidazolinium salt of organic acid

摘要

An N-alkyl-N'-methylimidazolinium salt of an organic acid is prepared in high purity and in high yield by (a) preparing an N-alkyl-N'-methylimidazolinium methyl carbonate in a quaternization reaction by methylating an N-alkylimidazoline with dimethyl carbonate and (b) reacting the resulting N-alkyl-N'-methylimidazolinium methyl carbonate with an organic acid, in an anion exchange reaction, wherein the reaction of each step is conducted in methanol solvent.