Separation of Organic Solvent/Water Mixtures by Acrylamide Gel Membrane Supported by Silica-Alumina Porous Membrane
Membrane separation of organic solvent/water mixtures, most of which have azeotropic points, has come to attract much attention from view point of energy conservation. Various types of membranes have been used and studied for separation of such mixtures. Most of them are nonporous organic polymer membranes, through which water permeates selectively. Such organic membranes have been improved by incorporating hydrophilic groups into the membrane to obtain high selectivity for water permeation1. But, fluxes through such membranes are small, in general. On the other hand, porous inorganic membranes such as silica-alumina porous membrane prepared in our laboratory have quite large flux of water due to the capillary suction pressure2,3. But, the selectivity of such porous membranes depends on the pore size and structure or largely on some pin holes left in the membranes4.
KeywordsComposite Membrane Separation Factor Membrane Module Solvent Concentration Ceramic Membrane
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