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Rare Metals

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12.05.2016

Synergistic extraction of zinc from ammoniacal solutions using a β-diketone mixed with trialkylphosphine oxide

verfasst von: Ru-Long Zhu, Xin-Bin Li, Chang Wei, Hui Huang, Min-Ting Li, Cun-Xiong Li, Fu-Li Tang

Erschienen in: Rare Metals | Ausgabe 3/2019

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Abstract

A simple comparative study of synergistic extraction of zinc from ammonium sulfate and ammonium chloride systems with mixtures of Mextral54-100 and tri-n-alkylphosphine oxide (TRPO) dissolved in n-heptane was described. Various parameters affecting the extraction process were investigated. Experimental results show that extraction from ammonium sulfate is better than that from ammonium chloride under the same conditions owing to the additional complexation between zinc and chloride ions. Total ammonium concentration and pH have a significant effect on zinc extraction efficiency because of the formation of zinc ammine complexes. The synergistic effect is explained by the formation of adduct between zinc chelates and trialkylphosphine oxide. The thermodynamic data show that the extraction reaction is exothermic and stripping is endothermic. Infrared (IR) spectra of the zinc-loaded organic phases were also examined.

Vorheriger Artikel Kenaf cellulose-based poly(amidoxime) ligand for adsorption of rare earth ions

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Titel: Synergistic extraction of zinc from ammoniacal solutions using a β-diketone mixed with trialkylphosphine oxide
verfasst von: Ru-Long Zhu
Xin-Bin Li
Chang Wei
Hui Huang
Min-Ting Li
Cun-Xiong Li
Fu-Li Tang
Publikationsdatum: 12.05.2016
Verlag: Nonferrous Metals Society of China
Erschienen in: Rare Metals / Ausgabe 3/2019
Print ISSN: 1001-0521
Elektronische ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-016-0728-1

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