使用离子液体"充填型"支撑液膜,进行乙醇/水混合物的蒸汽渗透膜分离实验,比较了原料浓度、操作温度对分离性能的影响.结果表明,离子液体支撑液膜的蒸汽渗透过程能够实现乙醇脱水,用于制备无水乙醇.经过140 h的实验测定,支撑液膜分离性能稳定.在50℃温度下,原料中含水摩尔分数0.024～0.24时,蒸汽渗透分离因子5.5～3.2,渗透通量55 g/(m2·h).离子液体支撑液膜的蒸汽渗透膜分离过程,有望用于醇类水溶液组成的恒沸体系脱水.
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