METHOD FOR PRODUCING HIGHLY PURE ANHYDROSUGAR ALCOHOLS WITH IMPROVED FLOWABILITY OF DISTILLATION RESIDUE

摘要

The present invention relates to a technique for preparing an anhydrosugar alcohol using hydrogenated sugar as a raw material and, more specifically, in a method for preparing an anhydrosugar alcohol by adding an acid to hydrogenated sugar (for example, hexitol) to convert to the anhydrosugar alcohol and distilling the converting reaction result solution by a thin film distiller, to a technique for preparing high purity anhydrosugar alcohol with low costs and high efficiency by improving a distillation yield and subsequent purification efficiency, by putting an anti-foaming agent to a distillation residue discharge line during distillation thereby improving flowability of the distillation residues.