Stability and selectivity of a multiphase membrane, consisting of dimethylpolysiloxane on an ionic liquid, used in the separation of solutes from aqueous mixtures by pervaporation

A novel ionic liquid ([(C3H7)(4)N][B(CN)(4)]) was immobilized and coated by silicon in a ceramic nanofiltration module; this multiphase membrane shows a high selectivity ( separation factor up to 177) and stability ( over nine months) during separation of 1,3-propanediol from aqueous mixtures by vacuum pervaporation.