Method of preparing comenic acid

摘要

Preparing comenic acid by heating 2,5-diketo-gluconic acid at a temperature within the range of 8°-120° C. and at a pH below 0. 1. &agr;-pyrone derivatives are formed as by-products, and comenic acid is separated therefrom by utilizing the solubility differences between the &agr;-pyrone derivatives and comenic acid.