{"title":"Stoichiometry of the Nickel Complex Formed with LIX 63 Hydroxyoxime under Acidic Chloride Conditions","authors":"K. R. Barnard, L. Zeng, D. Shiers","doi":"10.1080/07366299.2021.1992891","DOIUrl":null,"url":null,"abstract":"ABSTRACT The extraction of nickel by LIX® 63 hydroxyoxime (‘hydroxyoxime’) under acidic (10–100 g/L hydrochloric acid) chloride conditions was investigated with the intent of determining the stoichiometry of the resulting complex in solution. Maximum loading and continuous variation tests indicate that nickel is extracted as a cationic salt with chloride counter-ions, the resulting complex exhibiting octahedral coordination with 1:3:2 nickel:hydroxyoxime:chloride stoichiometry. This species is also observed to readily form under mildly acidic (pH 1–4) chloride conditions, with the extent of formation being independent of pH. Nickel extraction kinetics were moderately fast, equilibrium being reached in 10 minutes. The behaviour of this system helps to provide clarity in relation to complex stoichiometry and the role of different ligands in synergistic systems utilising LIX 63 and an organic acid such as Versatic 10, opening up the possibility of nickel extraction from acidic chloride media using LIX 63.","PeriodicalId":22002,"journal":{"name":"Solvent Extraction and Ion Exchange","volume":"40 1","pages":"477 - 492"},"PeriodicalIF":1.8000,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solvent Extraction and Ion Exchange","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1080/07366299.2021.1992891","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 1
Abstract
ABSTRACT The extraction of nickel by LIX® 63 hydroxyoxime (‘hydroxyoxime’) under acidic (10–100 g/L hydrochloric acid) chloride conditions was investigated with the intent of determining the stoichiometry of the resulting complex in solution. Maximum loading and continuous variation tests indicate that nickel is extracted as a cationic salt with chloride counter-ions, the resulting complex exhibiting octahedral coordination with 1:3:2 nickel:hydroxyoxime:chloride stoichiometry. This species is also observed to readily form under mildly acidic (pH 1–4) chloride conditions, with the extent of formation being independent of pH. Nickel extraction kinetics were moderately fast, equilibrium being reached in 10 minutes. The behaviour of this system helps to provide clarity in relation to complex stoichiometry and the role of different ligands in synergistic systems utilising LIX 63 and an organic acid such as Versatic 10, opening up the possibility of nickel extraction from acidic chloride media using LIX 63.
期刊介绍：
Solvent Extraction and Ion Exchange is an international journal that publishes original research papers, reviews, and notes that address all aspects of solvent extraction, ion exchange, and closely related methods involving, for example, liquid membranes, extraction chromatography, supercritical fluids, ionic liquids, microfluidics, and adsorption. We welcome submissions that look at: The underlying principles in solvent extraction and ion exchange; Solvent extraction and ion exchange process development; New materials or reagents, their syntheses and properties; Computational methods of molecular design and simulation; Advances in equipment, fluid dynamics, and engineering; Interfacial phenomena, kinetics, and coalescence; Spectroscopic and diffraction analysis of structure and dynamics; Host-guest chemistry, ion receptors, and molecular recognition.
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