Abstract: The solubility of catalytic membrane of PVA-Zr(Ⅳ) was investigated and that the catalytic layer was found to swell in nearly two hours. The composition of the bulk liquid mixture was varied during the swelling and was different from that of the catalytic layer when the swelling equilibrium state was reached.Furthermore, the reaction rate constants of reaction kinetics equations were obtained for the esterification of acetic acid with n-butanol catalyzed by PVA-Zr（Ⅳ）catalytic membrane. The esterification was taken as a model reaction to study the permeation properties of the catalytic membrane with comparison of the membrane without a catalytic layer. The permeation flux for the catalytic membrane was less than that for the non-catalytic layer membrane in the first reaction stage during swelling, and such comparision was reversed around four hours later when swelling equilibrium was reached.

Key words:

聚乙烯醇, 复合膜, 催化膜, 渗透蒸发, 酯化反应

摘要： 考察了PVA-Zr(Ⅳ)膜催化乙酸和丁醇酯化反应的宏观反应动力学,认为膜催化酯化反应为扩散-反应联合控制,膜溶胀实验表明反应液各组分浓度不同于膜中各组分平均浓度.假设膜催化反应分为：膜溶胀前及溶胀后两个阶段,分别求出了此两个阶段反应动力学常数.比较了PVA-Zr(Ⅳ)催化膜和无催化活性层的PVA膜渗透性能.

关键词:

聚乙烯醇, 复合膜, 催化膜, 渗透蒸发, 酯化反应