The isolation of organic compounds using organophilic pervaporation membranes
The isolation of organic compounds using organophilic pervaporation membranes
复制标题
DOI：
10.22079/jmsr.2017.49283.1106
复制
发表时间：
2017-07
影响因子：
--
通讯作者：
B. Bolto;Zongli Xie;M. Hoang
中科院分区：
文献类型：
--
作者：
B. Bolto;Zongli Xie;M. Hoang
亲有机膜提供了通过渗透蒸发回收有机化合物的方法，其利用有机相的选择性输送。主要应用是从水溶液中提取生物醇。膜的组成对性能的影响，在传输醇，而不是水在改善率是这次审查的重点。以这种方式，少量的生物燃料被去除，而不是通常大量的水。从而获得更经济的方法。最成功的膜在性质上是非极性的，并且可以是纯有机的、无机的或有机-无机聚合物杂化物。对于乙醇回收，当聚二甲基硅氧烷（PDMS）用作支撑基底上的非常薄的层时，100 ux速率是最佳的。沸石具有最佳的分离因子沿着，并具有合理的选择性，负载型硅分子筛具有较好的分离性能。对于丁醇回收，对于PDMS混合基质膜，100 ux速率是最好的。苯乙烯共聚物膜给出了一个合理的苯/环己烷分离的结果，而金属有机框架有潜力的有机异构体的分离，其中孔的几何形状变得重要。
Organophilic membranes provide a method of recovering organic compounds by pervaporation, which exploits the selective transport of the organic phase. The main application is in the extraction of bio-alcohols from aqueous solution. The effect of membrane composition on performance in transporting alcohols and not water at improved rates is the focus of this review. In this way the minor fraction, the bio-fuel, is removed rather than the usually large volume of water. A more economical process is then obtained. The most successful membranes are non-polar in character, and can be purely organic, inorganic or organic-inorganic polymer hybrids. For ethanol recovery, flux rates are best for polydimethylsiloxane (PDMS) when used as a very thin layer on a supporting base. Zeolites give the best separation factors along with reasonable fluxes, and supported silicalite performs well. For butanol recovery, flux rates are best for PDMS mixed matrix membranes. A styrene copolymer membrane gives a reasonable result for benzene/cyclohexane separation, while metal-organic frameworks have potential in the separation of organic isomers, where pore geometry becomes important.