Abstract: Pervaporation of dilute aqueous binary mixtures of four organic compounds (acetone A,butanone B,ethanol E and isopropanol P) through silicone rubber (PDMS) and its modifications was investigated. The experimental results showed that an increase in temperature increased the flux exponentially but it had little effect on the selectivity of membrane,Flux and selectivity has the order of A>B>E>P and A>B>P>E respectively.Both properties were increasingly improved when the(CH₃)₂SiO content in the membrane raised from 70% to 100%.

Key words: pervaporation, membrane, silicone rubber, acetone, ethanol, butanone, isopropanol