Torlon® hollow fiber membranes for organic solvent reverse osmosis separation of complex aromatic hydrocarbon mixtures
Torlon® hollow fiber membranes for organic solvent reverse osmosis separation of complex aromatic hydrocarbon mixtures
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DOI：
10.1002/aic.16757
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发表时间：
2019-08-30
期刊：
影响因子：
3.7
通讯作者：
Lively, Ryan P.
中科院分区：
文献类型：
--
作者：
Jang, Hye-Youn;Johnson, J. R.;Lively, Ryan P.
制备了无缺陷的聚酰胺-酰亚胺（Torlon（R））中空纤维膜以研究聚合物基有机溶剂反渗透（OSRO）分离的潜力。通过气体渗透来评估膜的质量，并且发现膜是无缺陷的。使用与炼油厂分离相关的芳烃的复杂混合物获得类似于180 g/mol的低分子量截止值。我们展示了80/20（摩尔%）的甲苯和1，3，5-三异丙基苯（TIPB，204克/摩尔）的混合物的散装OSRO型分离。在80-90巴的上游压力下，我们发现渗透物浓度为约98.5-99.0摩尔%甲苯，并且渗透物中的TIPB截留系数为约90%。我们观察到0.01 L/m（2）hr bar的低溶剂渗透性，这可归因于低OSRO驱动力和Torlon（R）的低渗透性。发现该膜在高达95巴的压力和60摄氏度的温度下提供稳定的性能。
Defect-free polyamide-imide (Torlon (R)) hollow fiber membranes were fabricated to investigate the potential for polymer-based organic solvent reverse osmosis (OSRO) separations. The quality of the membranes was assessed by gas permeation, and the membranes were found to be defect-free. Low molecular weight cut-offs of similar to 180 g/mol were obtained using a complex mixture of aromatic hydrocarbons relevant to refinery separations. We demonstrate bulk OSRO-type separations of 80/20 (mol%) mixtures of toluene and 1,3,5-triisopropylbenzene (TIPB, 204 g/mol). At an upstream pressure of 80-90 bar, we find that the permeate concentration was approximately 98.5-99.0 mol% toluene and that the TIPB rejection coefficient was approximately 90% in the permeate. We observed low solvent permeances of 0.01 L/m(2) hr bar, which can be attributed to the low OSRO driving forces and the low permeability of Torlon (R). The membranes were found to provide stable performance up to pressures of 95 bar and temperatures of 60 degrees C.