分离有机/有机混合物的PVA、CA系列膜及其渗透汽化性能研究 (Ⅰ)膜材料与成膜工艺

STUDIES ON THE PVA MEMBRANE AND CELLULOSE ESTER MEMBRANE AND THEIR PERVAPORATION PERFORMANCE FOR SEPARATION OF ORGANIC MIXTURE (Ⅰ) MEMBRANE MATERIALS AND MAKING-MEMBRANE TECHNIQUE

依据溶度参数原则和分离甲基叔丁基醚 (MTBE) /甲醇 (Me OH)混合物的选择渗透性 ,选择了聚乙烯醇 (PVA)为复合膜的分离层材料 ,聚丙烯腈 (PAN)、醋酸纤维素 (CA)系列为支撑层的膜材料。初步讨论了膜材料和复合膜结构对分离性能的影响 ,给出了用不同成膜工艺制备的膜性能 ,获得了可用于有机 /有机体系分离的性能优良的 PVA/PAN和 PVA/CA复合膜 ,以及

Polyvinyl alcohol (PVA), polyacylonitrile (PAN) and cellulose ester were respectively chosen as the separation layer and the support in the composite membranes based on the concept of the solubility parameter and the selective permeation for separating methyl tert -butyl ether (MTBE)/methanol(MeOH) mixture. The effects of the type of the membrane materials and the construction of the composite membrane on the separation performance were preliminary discussed. The separation performance of the membranes prepared by several making-membrane techniques were presented. The composite membranes of PVA/PAN and PVA/CA, and CTA hollow fiber membrane, which possesses good performance in separating the organic/organic system, were developed.