Study of solvent casting/particulate leaching technique membranes in pervaporation for dehydration of caprolactam

被引：16
作者：
Lin, Wenhai [1 ]
Li, Qin [1 ]
Zhu, Tianrong [1 ]
机构：
[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China
来源：
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2012年 / 18卷 / 03期
关键词：
Solvent casting/particulate leaching technique; epsilon-Caprolactam; Polyvinyl alcohol; Pervaporation; Dehydration; CROSS-LINKED PVA; EPSILON-CAPROLACTAM; CHITOSAN MEMBRANES; MIXTURES; SEPARATION; ETHANOL; COPOLYMERS; TRANSPORT; BEHAVIOR; SORPTION;
D O I：
10.1016/j.jiec.2011.09.007
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
New porous and rough PVA (polyvinyl alcohol) membranes were synthesized by solvent casting/particulate leaching technique to improve caprolactam (CPL) pervaporation (PV) separation dehydration process. The membranes were characterized by FTIR, SEM, XRD, and contact angle measurements. On account of their special structure, solvent casting/particulate leaching technique membranes showed different surface morphologies compared with the original PVA membrane with enhanced hydrophilicity. By evaluating PV performance and mechanism, a PV transport equation was introduced to evaluate composite membrane permeation flux, separation factor, diffusivity/sorptivity selectivity, and activation energy. The maximum flux obtained in this work was greatly improved to 3.2 kg/m(2) h and reached industrial application levels for separating CPL/water mixtures (CPL 70 wt%). Crown Copyright (C) 2012 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry. All rights reserved.
引用
收藏
页码：941 / 947
页数：7
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