METHOD AND DEVICE FOR PURIFYING ALCOHOL

摘要

The purpose is to provide a device and method for purifying alcohol with which it is possible to prevent a reduction in performance of the dealcoholization membrane by using an organic acid adsorbent having the ability to adsorb or neutralize highly membrane-degrading substances without adjusting pH during the last step of adsorption. The solution is to provide a device for purifying alcohol comprising a fermentation cell for converting the introduced fermentation starting materials to alcohol using a yeast and producing a fermented liquid containing alcohol and a dealcoholization membrane device that comprises a dealcoholization membrane having the function of selectively allowing the permeation of alcohol and that is for the introduction of the fermented liquid produced by the fermentation cell and the separation of alcohol to the permeation side of the dealcoholization membrane, the device for purifying alcohol being characterized in having an organic acid adsorption device that has an organic acid adsorption material for removing by adsorbing the membrane-degrading organic acid that is contained in the fermented liquid fed to the dealcoholization membrane and that becomes a source of a reduction in the dealcoholization membrane separating capability. Also provided is a method for purifying alcohol using the steps of the device for purifying alcohol.