HIGHLY METHANOL-SELECTIVE MEMBRANES FOR THE PERVAPORATION SEPARATION OF METHYL T-BUTYL ETHER/METHANOL MIXTURES

被引：64

作者：

CHEN, WJ ^{[1
]}

MARTIN, CR ^{[1
]}

机构：

[1] COLORADO STATE UNIV,DEPT CHEM,FT COLLINS,CO 80523

来源：

JOURNAL OF MEMBRANE SCIENCE | 1995年 / 104卷 / 1-2期

关键词：

COMPOSITE MEMBRANES; ION-EXCHANGE MEMBRANES; LIQUID PERMEABILITY AND SEPARATIONS; MEMBRANE PREPARATION AND STRUCTURE; PERVAPORATION;

D O I：

10.1016/0376-7388(95)00017-7

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

We have investigated the pervaporation separation of methyl t-butyl ether (MTBE)/methanol (MeOH) mixtures using composite membranes prepared by coating a thin film of a polystyrenesulfonate across the surface of a microporous alumina support membrane. Such composite membranes are designated PSS/Al2O3 composites in this paper. The results show that the PSS/Al2O3 composite membranes possess high MeOH transport selectivity, relative to MTBE. MeOH concentrations in the permeate were always greater than 99.5 wt% for all membranes and for all feed solution compositions studied. Membranes in the Mg2+-counter ion form (PSS-Mg) showed higher separation factors than membranes having Na+ as the counter ion (PSS-Na). Extremely high separation factors (25000 to 35000) were observed for the PSS-Mg/Al2O3 composite membrane of 27.5 mol% sulfonate.

引用

页码：101 / 108

页数：8

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