PROCESS FOR IMPROVING THE PURITY OF HEXANE DIOL-1,6

摘要

A process for separating impurities from aqueous solutions of hexane diol-1,6 preliminary compounds like adipine and 6-hydroxy capronic acid, comprising the addition of at least one carboxylic acid to a solution (a) of hexane diol-1,6 and subjecting said solution (a) or a solution (b) containing carboxylic acid(s) as preliminary compounds of hexane diol-1,6 to a heat treatment at temperatures above room temperature in the absence of hydrogen.