Non-aqueous liquid membrane system

After analyzing the status quo and development of the research of liquid membrane, we put forward the possibility and necessity of establishment of a new type of liquid membrane system, i.e. non-aqueous liquid membrane system. The new liquid membrane system was founded by replacing water in former water–oil–water or oil–water–oil system with organic solvents or fluid polymer. Two types of non-aqueous liquid membrane system were successfully founded. The first is the modification of water–oil–water system without carrier, and another is the modification of oil–water–oil system with carrier. The carriers were synthesized from alkenyl crown ether or azacrown ether by hydrosilylation of methyldichlorosilane, followed by condensation with α,ω-dihydroxypolydimethylsiloxane. The transport of benzene, xylenes, benzonitrile, cyclohexanol and propanediol in the non-aqueous liquid membrane systems were investigated. It was found that the carriers can facilitate the substance through a non-aqueous liquid membrane, and can transport 1,2-propanediol from the mixture of 1,2-propanediol and 1,3-propanediol slightly selectively.