ELECTRODIALYSIS OF ACID-SOLUTIONS WITH METALLIC DIVALENT SALTS - CATION-EXCHANGE MEMBRANES WITH IMPROVED PERMEABILITY TO PROTONS

被引：36

作者：

CHAPOTOT, A ^{[1
]}

LOPEZ, V ^{[1
]}

LINDHEIMER, A ^{[1
]}

AOUAD, N ^{[1
]}

GAVACH, C ^{[1
]}

机构：

[1] MAT & MEMBRANE PROC LAB,CNRS,UMR 9987,F-34033 MONTPELLIER,FRANCE

来源：

DESALINATION | 1995年 / 101卷 / 02期

关键词：

ELECTRODIALYSIS; ACID EFFLUENTS; MEMBRANE SURFACE; MODIFICATION;

D O I：

10.1016/0011-9164(95)00017-V

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The electrodialysis of acid solutions (chlorhydric and sulfuric) in the presence of metallic divalent salts (chloride and sulfate) are studied. The anion-exchange membranes used in this process have been selected from several membranes manufactured by Solvay because of their low water content and their good anionic selectivity. Two kinds of cationic exchange membranes have been tested: the No. 9, a homopolar prototype membrane, manufactured by Solvay, which was selected after several tests; and a commercial cation-exchange membrane (CDS membrane), which has been modified on its surface by adsorption of polyelectrolyteimine. The obtained results show that HCl+CuCl2 or NiCl2 and H2SO4+CuSO4, NiSO4 or ZnSO4 can be treated by electrodialysis using the selected CEM. Tn all cases the acid is not only more concentrated but also purer than when traditional CEM are used. Some problems appeared with the mixture HCl+ZnCl2 because of complexes formation between Zn2+ and Cl- ions.

引用

页码：141 / 153

页数：13

共 17 条

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