Method for Separating Water/Ethanol Using NAA Zeolite Separator
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United States of America Patent
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Apr 16, 2015
app pub date -
Mar 20, 2013
filing date -
Mar 21, 2012
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Abstract
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.
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