Dow Global Technolgoies LLC

Edward H Yonemoto

Glenn A Miller

Rainer Potthast

A process of refining a crude C-Caliphatic diol, preferably, a C-Cmonocyclic aliphatic diol, more preferably, an isomeric mixture of cis/trans-(1,3)(1,4)-cyclohexanedimethanol, containing in addition to the diol one or more impurities selected from phenols, and aliphatic mono-ols, esters, carboxylic acids, and hemiacetals, and mixtures thereof. The refining process involves distilling the crude C6-C16 aliphatic diol in the presence of an alkali or alkaline earth metal compound, preferably, an excess thereof relative to acid equivalents present in the diol.

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Houston, TX, United States of America

Edward H Yonemoto