Review
Version 1
Preserved in Portico This version is not peer-reviewed
Ni-Cu Ion-Exchange in Anolyte: An Efficacious Approach of Nickel Extraction
Version 1
: Received: 5 September 2023 / Approved: 6 September 2023 / Online: 6 September 2023 (09:31:47 CEST)
A peer-reviewed article of this Preprint also exists.
Tang, X.; Ju, K. Exploring Strategies for Copper Removal from Nickel Anolytes: A Review. ChemEngineering 2023, 7, 116. Tang, X.; Ju, K. Exploring Strategies for Copper Removal from Nickel Anolytes: A Review. ChemEngineering 2023, 7, 116.
Abstract
Various methods including electrochemical purification, chemical precipitation, solvent extraction, and ion-exchange resins, have maturely been used for removal of copper from nickel anolyte. Interestingly, these approaches of copper removal from nickel anolyte by precipitation are well used as the primary industrial method in nickel production again. However, these methods suffer from several severe drawbacks in industrial practices. One is that a small amount of nickel precipitates with copper in slags,resulting in slag treatment difficulties. Second, this process requires an extremely high activity of the sulfide-based copper removal agents which results in high production costs; the short storage period of the copper removal agent is another drawback of this method. These have been the key challenges in the smelting process of nickel. Herein, we present a comprehensive review of the nickel removal methods used for nickel anolyte purification, electrochemical purification, chemical precipitation, solvent extraction, and ionexchange resins. The advantages and feasibilities of each technique in industrial applications are also explored and analyzed. Finally, we demonstrate that ion-exchange resin-based extraction method can pave a new path for metallurgical research on nickel.
Keywords
nickel electrolysis; copper removal; iminodiacetic acid chelating resin; electrochemical purification; isostere principle
Subject
Chemistry and Materials Science, Metals, Alloys and Metallurgy
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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