nerfahren zur Konzentrierung und Reinigung von Alkohol.

摘要

A process for preparing highly pure alcohol by concentrating and purifying synthetic alcohol, an aqueous solution of alcohol used in food industry or, particularly, fermentation alcohol with less energy, and an apparatus adapted for the process are disclosed. The process comprises recovering 99 wt % or more of alcohol from an aqueous alcohol solution using a small amount of propane as the solvent in a super-critical or pseudo-critical state, and cooling the propane into a liquid state to thereby improve alcohol selectivity and concentrate alcohol to a concentration of 95 wt % or more.