Preparation of a Novel Hollow-Fiber Anion-Exchange Membrane and Its Preliminary Performance in Diffusion Dialysis

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• 作者：Tongwen Xu ; Zhaoming Liu ; Chuanhui Huang ; Yonghui Wu ; Liang Wu ; Weihua Yang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2008
• 出版时间：August 20, 2008
• 年：2008
• 卷：47
• 期：16
• 页码：6204-6210
• 全文大小：228K
• 年卷期：v.47,no.16(August 20, 2008)
• ISSN：1520-5045

文摘

To enhance the performance of diffusion dialyzers for acid recovery, new hollow-fiber anion-exchange membranes were prepared from poly(2,6-dimethyl-1,4-phenylene oxide) by following the procedures of bromination, spinning, and quaternary amination. The best membranes prepared had the following inherent properties: ion-exchange capacity = 2.2−2.5 mmol/g, water content (W_R) = 0.6−0.8 g of water/g of dry fiber, and dimension change ratio (L_R) < 20%. When used to treat a simulated aluminum polishing waste liquor (HCl, 3.5 mol/L; AlCl₃, 0.036 mol/L), the membranes could achieve an acid recovery ratio of 0.6−0.7 and an aluminum rejection ratio above 90%. These performances, plus favorable equipment size/productivity ratio, make hollow-fiber-type dialyzers more competitive than plate-and-frame-type ones. For industrialization in the near future, further improvement on membrane properties is underway.