渗透汽化分离苯—乙醇混合物

Pervaporation Separation of benzene-Alcohol Mixture

以甲基硅橡胶及甲基丙烯酸十二酯—甲基丙烯酸异丁酯的共聚物作为膜材料，以聚丙烯睛多孔膜为底膜制成复合膜，对苯—乙醇混合物进行渗透汽化分离。考察了膜材料的组成、分离温度、原料液组分等因素对膜性能的影响。在温度为１５℃～５０℃范围内，对２０％～５０％浓度的苯—乙醇溶液，最大透过速率为３４０ｍ／ｍ２ｈ，分离系数为１８．８。

ervaporation reparation of benzene-alcohol mixture was carried out throuth the composite membrane, which was made of silicone rubbers the copolymer of isobutyl mcthacryate and dodecyl methacrylate. PAN porous membrane was as the basic membrane. The effects of the composition of the compostic membrane, separation temperature and the benzene concentration in the feed on the permeation flux and separation factor of the composite membrane were examined. The results indicated that the membrane was preferentially permeable for benzene and that separation factor and permeation flux for the membrane were 18.8 and 340 g / m2h, respectivelly.