WATER/ETHANOL SEPARATION METHOD BY A DOUBLE SEPARATION PROCESS USING NAA ZEOLITE SEPARATION MEMBRANE

摘要

PURPOSE: Water/ethanol separation method is provided to facilitate separation of water and ethanol and to reduce maintenance cost of a separation apparatus as durability is not decreased even in a continuous separation process.;CONSTITUTION: Separation method of water and ethanol includes the following steps; a step that increases ethanol concentration to 95-97 weight% using a separation membrane with a first water selectivity and a first flux while separating mixture of water and ethanol; a step that increases ethanol concentration to 97-100 weight% using a separation membrane with a second water selectivity which is lower than the first water selectivity and a second flux which is higher than the first flux.;COPYRIGHT KIPO 2013