使用多孔液体进行液-液分离
Beibei Lai1, Deborah E Crawford2, Haochen Wu1
1School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, UK.
Angewandte Chemie (International ed. in English)
|July 10, 2024
概括
多孔液体 (PLs) 为分离可混合液体提供了一种新的方法,例如MEG/水和酒精/水混合物. 这些稳定的PLs可以再生和重复使用,显示了工业液体-液体分离应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 分离科学 分离科学
背景情况:
- 多孔液体 (PLs) 是一种流体吸附剂,主要用于气体混合物分离.
- 从水中分离可混合液体,如单乙烯糖醇 (MEG),带来了重大的工业挑战.
- 传统的溶剂提取方法用于从水中回收MEG通常是低效的.
研究的目的:
- 调查多孔液体 (PLs) 在分离可混合液体混合物的有效性.
- 为了证明PLs在从水溶液中回收单乙烯糖醇 (MEG) 的应用.
- 探索PLs降低饮料中酒精度的潜力.
主要方法:
- 通过将ZIF-8分散在聚二甲基 (PDMS) 或芝麻油中,制备物理稳定的多孔液体 (PLs).
- 使用5nmPEEK膜作为PL和液体混合物之间的屏障.
- 使用PLs测试从MEG/水混合物中选择性提取MEG和从饮料中提取酒精.
主要成果:
- 多孔液体 (PL1和PL2) 呈现出极好的物理稳定性,并且在选择性地从水中提取MEG时是有效的,即使在低度 (3:97 wt%) 中也是如此.
- PLs表现出成功的再生和可重复使用性,表明适合连续循环提取过程.
- 另一种不同的PL配方 (PL3,silicalite-1@PDMS) 有效地从饮料中提取酒精,显示出降低酒精含量的潜力.
结论:
- 多孔液体,由于其固有的空孔结构和高溶解度,适用于液-液分离,而不仅仅是气体混合物.
- 开发的PLs提供了一个有希望的,可重复使用的,潜在的连续工业MEG回收和饮料中酒精度调整的方法.
- 这项研究将多孔液体的应用范围扩展到液体-液体分离技术领域.
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