Electrodialysis of hydrochloric acid

Electrodialysis (E.D.) was not commonly used for the extraction and the reconcentration of acids because the standard anion exchange membranes (A.E.M.) are highly permeable to proton. Recently, special A.E.M. showing a reduced proton leakage have been developed for the recovery of acids by E.D. In t...

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Bibliographic Details
Published inDesalination Vol. 94; no. 2; pp. 151 - 165
Main Authors Lindheimer, A., Boudet-Dummy, M., Gavach, C.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 1993
Elsevier
Subjects
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...)
Hydrochloric acid
Transport process
Inorganic acids
Material recovery
Ion exchange membrane
Concentration factor
Current efficiency
Experimental study
Organic compounds
Electrodialysis
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Summary:Electrodialysis (E.D.) was not commonly used for the extraction and the reconcentration of acids because the standard anion exchange membranes (A.E.M.) are highly permeable to proton. Recently, special A.E.M. showing a reduced proton leakage have been developed for the recovery of acids by E.D. In this paper, we present a study of E.D. of hydrochloric acid solutions using one of these membranes. The two main parameters which quantify the performances of the process: the current efficiency of HCl removal and the maximum reconcentration level of the acid are analysed on the basis of a transport model. The current efficiency is only determined by the proton leakage through the A.E.M. while the maximum reconcentration level is also determined by the water transport through the two ion exchange membranes.
ISSN:0011-9164
1873-4464
DOI:10.1016/0011-9164(93)EO127-J