SynopsisSeparation of aqueous ethanol solution was carried out by pervaporation using a membrane which consisted of common polymer membranes. A membrane obtained from poly( tert-butyl methacrylate-co-styrene) was effective for a selective separation of ethanol from aqueous ethanol solution by pervaporation technique. The pervaporation of ethanol-water mixture through the present membranes was analyzed as a solution-diffusion process, on the assumption that the both diffusion coefficients of each component are an exponential function of ethanol concentration.

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Separation of ethanol from aqueous ethanol solution was carried out by pervaporation through a membrane which consists of common synthetic polymers. A membrane from poly(cyclohexyl methacrylate-co-styrene) showed membrane performance that preferentially permeated ethanol from ethanol-water mixtures by pervaporation technique. The pervaporation of ethanol-water mixture through the present membrane was analyzed as a solution-diffusion process.