Process for producing 2,3-butanediol

摘要

Disclosed is a process by which 2,3-butanediol of high purity and very low degree of coloration is obtained by adding an alkaline substance and conducting distillation (step B) after a step (step A) in which 2,3-butanediol culture broth produced by microbial fermentation is subjected to nanofiltration treatment and ion-exchange treatment.