Separation of caprolactam-water system by pervaporation through crosslinked PVA membranes

被引:34
作者
Zhang, Lei [1 ]
Yu, Ping [1 ]
Luo, Yunbai [1 ]
机构
[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China
关键词
CPL-water mixtures; pervaporation; PVA crosslinkd membranes; glutaraldehyde; novel separation technique;
D O I
10.1016/j.seppur.2006.03.020
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
epsilon-Caprolactam (CPL) is usually crystallized from CPL-water mixtures by reduced pressure distillation through triple-effect evaporation sets. But high energy consumption and low heat transfer coefficient limit economic profit of this process. To improve or substitute the CPL aqueous solution dehydration process, pervaporation separation of caprolactam-water system was investigated using PVA crosslinked membranes. An indepth study of sorption, swelling, pervaporation performances of caprolactam-water mixtures and crosslinked membrane had been conducted. The experimental data demonstrated that the PVA crosslinked with glutaraldehyde showed excellent dehydration performances. The novel separation technique is feasible for application to the dehydration of CPL-water mixtures. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:77 / 83
页数:7
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