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Pervaporation separation performance of PI-DA membrane in dehydrating of isopropanol: (a) dependence of permeation flux and water content in permeate on water content in the feed solution isopropanol/water (feed temperature is 25 °C); (b) dependence of permeation flux and water content in permeate on feed solution temperature (feed solution 88 wt.% isopropanol/12 wt.% water); (c) dependence of permeation flux and water content in the feed solution on time of pervaporation.
