Abstract
A composite membrane prepared by the concentrated emulsion polymerization method, containing poly(sodium acrylate) as the dispersed phase and poly(divinyl benzene) as the continuous phase, was investigated regarding its swelling as well as the pervaporation separation of water-acetic acid mixtures. The experiments were carried out in order to be compared with the pervaporation separation of water-ethanol mixtures performed with the same membrane [J. Appl. Polym. Sci., 42 (1991) 2429]. The swelling of this membrane was found to be higher for acetic acid solutions than for ethanol solutions at the same mixture concentration. The permeation rates through this membrane for the water-acetic acid mixtures were in the range of 0.41–2.36 kg/m 2-hr, and the permselectivity varied between 3.4 and 11.6. Compared with the separation of water-ethanol mixtures, the present experiments show much higher permeation rates and lower permselectivities.
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