Separation of acetic acid aqueous solution through TPX pervaporation membranes

• Main Author: 張碧鳳
• Other Authors: J.Y. Lai
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/10586121526238027407

碩士 === 中原大學 === 化學工程學系 === 88 === The present work is proposed to evaluate the potential of using pervaporation process to separate acetic acid-water mixtures. In this study, the asymmetric substrate membranes of poly(4-methyl-1-pentene) were prepared by wet phase inversion method with different kinds of coagulation medium and nonsolvent-added. In addition, to improve the membrane permselectivity, a hydrophilic material (polyacrylic acid) was coated on the poly(4-methyl-1-pentene) membrane surface by dip-coating method. The PAA/TPX composite membrane with plasma pre-treated effectively prevented interface peeling. Optimum pervaporation performances were obtained with a PAA/TPX composite membrane prepared from the PAA/Eg/Al+3 mass ratio = 1/2/0.05 coating solution at 5W/30sec plasma treatment condition. The permeation rate decreased and the separation factor increased with increasing PAA layer thickness. Moreover, the effects of feed concentration and feed temperature on the pervaporation performances of the PAA/TPX composite membranes were studied.