New process for recovery of zinc sulfate and sulfuric acid from zinc electrowinning bleed solutions

Aharon M. Eyal, Avraham M. Baniel, Klara Hajdu, Joseph Mizrahi

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Acid-base couple extractants extract sulfuric acid and zinc sulfate efficiently, selectively and reversibly. Their properties allowed development of a new, solvent extraction process for treating zinc electrowinning waste streams. In this process, about 95% of the sulfuric acid and 95% of the zinc can be recovered at concentrations high enough to be directly recycled to zinc production. Lime consumption and gypsum formation are substantially reduced. Only one extractant is used in the process, and zinc is recovered as zinc sulfate.

Original languageEnglish
Pages (from-to)209-222
Number of pages14
JournalSolvent Extraction and Ion Exchange
Volume8
Issue number2
DOIs
StatePublished - 1990

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