Pervaporation Separation of Organic-Aqueous Mixtures Using the Chitosan Membrane

Abstract

Abstract: Pervaporation separation of dioxane-water and acetone-water mixtures has been studied by use of chitosan homogeneous and composite membranes. The results show that the membranes have an excellent selectivity and a permeation rate for the separation of the mentioned mixtures. For example, water in permeates is more than 99.5wt%, while the permeation rates are 946.5, 306.9g·(m²·h)^-1 for dioxane-water(60℃)and acetone-water (40℃)mixtures, respectively, when the feeds are close to azeotropic compositions.With increasing temperature, the increases of both in flux and separation factor have been observed.Employing the composite membrane, the fluxes have a more conspicuous increase than that of homogeneous membrane, meanwhile, the selectivities have an appropriate reduction.

Key words: Membrane separation, Pervaporation, Chitosan, Organic-aqueous mixtures

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LI Wen-Jun, MA Jing-Hong. Pervaporation Separation of Organic-Aqueous Mixtures Using the Chitosan Membrane[J]. Chem. J. Chinese Universities, 1994, 15(9): 1404.

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Pervaporation Separation of Organic-Aqueous Mixtures Using the Chitosan Membrane

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