负载离子液体的阳离子交换膜在烯烃/烷烃分离中的应用

Application of cation exchange membrane loaded with ionic liquid in olefin/paraffin separation

制备了负载胆碱赖氨酸盐离子液体([Ch][Lys])的阳离子交换膜,测定并表征其膜的性能,研究其在电渗析下分离1-己烯/n-己烷的能力。结果表明,膜含水率和离子交换容量随离子交换树脂质量分数和离子液体含量的增加而增大;膜的面电阻随树脂质量分数增大而减小,随离子液体含量的增大而增大;膜中添加离子液体明显提高了其分离1-己烯/n-己烷的能力,当阳离子交换树脂含量为70%、离子液体添加量为15%时,所制的阳离子交换膜对1-己烯分离的选择性最高,其值可达9.5。

Cation exchange membrane loaded with choline lysine ionic liquid([Ch][Lys]) was prepared.The membrane properties were characterized, and its performance in separating 1-hexene/n-hexane by electrodialysis was studied. The results showed that the water content and the ion exchange capacity of the membrane increased with the increase of contents of the resin and the ionic liquid, while the surface resistance decreased with the increase of resin mass fraction, and increased with the increase of ionic liquid content. The addition of the ionic liquid in the membranes significantly improved their ability to separate 1-hexene/n-hexane. When the content of the ion exchange resin was 70% and the amount of the ionic liquid was 15%, the selectivity for 1-hexene separation reached 9.5.