Highly intergrown mordenite membranes were rapidly prepared on seeded aluminum supports by microwaveassisted synthesis. Both the thicknesses of the zeolite layer and the sizes of the zeolite crystals of the mordenite membranes were highly dependent on the synthesis time. With a SiO 2 :0.08Al 2 O 3 :0.2Na 2 O:0.1NaF:35H 2 O precursor synthesis gel, a compact and 0.75 μm thick mordenite crystal layer was successfully prepared on the aluminum support at 170 °C for 3 h. The as-synthesized mordenite membrane exhibited excellent water perm-selectivity and long-term stability for dehydration of alcohol/water, acetic acid/water, and acetic acid/ethanol/water/ethyl ester mixtures by pervaporation. For dehydration of 90 wt % acetic acid/water solution, the corresponding flux and separation factor (water over acetic acid) of the membrane remained at 0.44 kg•m −2 •h −1 and 2300, respectively, at 75 °C even after 59 days of immersion.

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Hydrophilic ZSM-5 zeolite membranes were successfully prepared using coal fly ash as aluminum source by conventional and microwave-assisted hydrothermal syntheses. As-synthesized membranes had good H2O selectivity for dehydration of 10 wt % H2O/organic solution by pervaporation. Microwave-assisted synthesis drastically reduced the membrane synthesis time from 6 to 1 h. Moreover, the flux of the membrane prepared by the microwave-assisted synthesis was about twice the flux of a membrane prepared by a conventional method.