Method for Separating Water/Ethanol Using NAA Zeolite Separator

摘要

Disclosed herein are a method of preparing a NaA zeolite membrane for water/ethanol separation, and a method of separating water/ethanol using the same, wherein a water/ethanol mixture is separated by pervaporation using a NaA zeolite membrane employing a dual separation process, including: primary separation for increasing an ethanol concentration to 95˜97 wt % using a membrane having high water selectivity and low flux; and secondary separation for increasing the ethanol concentration to 97˜100 wt % using a membrane having low water selectivity and high flux, thereby obtaining excellent separation efficiency at comparatively low energy.

主权项

1. A method of separating water/ethanol, comprising:
(a) separating a water/ethanol mixture so that an ethanol concentration is increased to 95˜97 wt % using a first membrane having a first water selectivity and a first flux; and (b) separating water and ethanol of a product obtained in (a) so that the ethanol concentration is increased to 97˜100 wt % using a second membrane having a second water selectivity lower than the first water selectivity and a second flux higher than the first flux.