Sulfuric acid concentration with an electro-electrodialysis process
Framatome, Tour Fiat, Place de la Coupole, 92084 Paris la Défense France Hydrometallurgy
(Impact Factor: 1.93).
12/1988; 21(2):191-201. DOI: 10.1016/0304-386X(88)90004-7
Commercial anion-exchange membranes exhibit a strong proton leakage which makes them unsuitable for use in the recovery of sulphuric acid from sulphate containing solutions resulting from some hydrometallurgy processes. Experiments are reported which compare membrane permeabilities under electro-electrodialysis conditions. With most commercial membranes, the permeability to sulphate ions decreases rapidly when the acid concentration increases in the anolyte. The highest sulphuric acid concentration is obtained with a prototype membrane which will be shortly produced on an industrial scale.
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