Preliminary Design of a Solvent Extraction Process for the Galvanic Stripping of Iron from D2EHPA


The inability to economically separate Fe3+(aq) from a variety of liquid effluents is a major concern for the primary metals industry. A unique solvent extraction process, galvanic stripping, has been developed to address this problem. The galvanic stripping of iron from D2EHPA using only a 5-10 g/L H2SO4 solution is achieved after Fe3+ is directly reduced to Fe2+ in the organic phase using zinc metal additions. To date, the primary focus of the laboratory research has been on optimizing the parameters that control iron removal. The results from these studies have now been used to make a preliminary design for a continuous flow process that is envisioned for zinc industrial applications. Specific quantitative data are shown for the use of a Zn-Pb alloy in the iron-removal process. Some introductory results on electrochemical potential measurements and impurity distribution with solution cycling are also given.


Materials Science and Engineering

Keywords and Phrases

D2EHPA; Galvanic stripping; Iron removal; Solvent extraction; Zinc processing

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Document Type

Article - Journal

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Publication Date

01 Dec 2000

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