聚苯基喹噁啉膜对有机液体混合物的渗透气化性能

Pervaporation of Organic Liquid Mixtures through Polyphenylquinoxaline Membranes

研究了聚苯基喹噁啉[PPQ(B)]及聚苯基单醚喹噁啉[PPQ(E)]膜对水/乙醇、水/异丙醇、甲苯/乙醇和苯/环已烷等液体混合物体系的渗透气化特性。发现PPQ(B)、PPQ(E)膜水/乙醇及水/异丙醇混合物而言,均属水优先透过型。PPQ(E)膜在70℃下,对水/异丙醇(6.3/93.7wt%)混合液的分离系数α_(w/p)达127。实验结果还表明,PPQ(B)膜对甲苯/乙醇及苯/环已烷混合液的渗透气化分别为甲苯及苯优先透过型。对以上实验结果从理论上进行了探讨。

In this paper, we study the pervaporation properties of polyphenylquinoxaline containing ether linkage [PPQ(E)] and polyphenyl quinoxaline[PPQ(B)] for water/ ethanol, water/ isopropanol, toluene / ethanol, andbenzene / cyclohexane mixtures. PPQ(B), PPQ(E) membranes for pevaporationof water/ ethanol and water/ isopropanol feed are prior permeation mem-branes for water. The separation factor of PPQ(E) α_(w/p) for water / isopropanolmixture feed (6.3 / 93.7 wt% ) is equal to 127 at 70℃. PPQ(B) membrane forpervaporation of toluene / ethanol and benzene / cyclohexane liguid mixturesare prior permeation membrane for toluene and benzene respectively.