Jj. Jafar et Pm. Budd, SEPARATION OF ALCOHOL WATER MIXTURES BY PERVAPORATION THROUGH ZEOLITE-A MEMBRANES/, Microporous materials, 12(4-6), 1997, pp. 305-311
Zeolite NaA membranes were prepared from homogeneous solution on macro
porous zirconia composite supports in sheet and tube form. Zeolite KA
membranes were obtained by ion exchange from the sodium form. The memb
ranes were tested for the removal of water from isopropanol/water mixt
ures by pervaporation. Feed and permeate compositions and flux were me
asured for pervaporation at 25 and 70 degrees C. Both the Na and K for
ms of zeolite A membranes were highly selective, separation factors in
excess of 10(4) being achieved at low concentrations of water in the
feed. Membrane performance was not affected by heat treatments to 150
degrees C. (C) 1997 Elsevier Science B.V.