Solvent extraction of cobalt(II) ions; cooperation of oximes and neutral donors

被引：36

作者：

Rafighi, P. ^{[1
]}

Yaftian, M. R. ^{[1
]}

Noshiranzadeh, N. ^{[1
]}

机构：

[1] Zanjan Univ, Fac Sci, Dept Chem, Phase Equilibria Res Lab, Zanjan, Iran

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2010年 / 75卷 / 01期

关键词：

Solvent extraction; Cobalt; Synergism; Oximes; Neutral donors; BETA-HYDROXY NAPHTHALDOXIME; SYNERGISTIC EXTRACTION; SEPARATION; COPPER; NICKEL;

D O I：

10.1016/j.seppur.2010.07.006

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

2-Hydroxy-1-naphthaldoxime (HL1) and 1-hydroxy-2-naphthaldoxime (HL2) have been synthesized and their extractive properties towards cobalt(II) ions from sodium chloride aqueous phase into dichloromethane were studied. The presence of neutral donors tri-n-octylphosphine oxide (TOPO), tributylphosphate (TBP), tris(2-ethylhexyl)phosphate (T2EHP), tributylamine (TBA), trioctylamine (TOA) and dimethylsulfoxide (DMSO) shifts the extraction percentage curves towards lower pH region, indicating a synergistic effect of these donors on the extraction of cobalt ions by the studied oximes. The examined amines present significantly higher synergistic effect in comparison with TOPO, TBP, T2EHP and DMSO donors. It is shown that the stoichiometry of adducts formed in the organic phase by both HL1 and HL2 in the presence of TOPO depends on the oxime concentration. This stoichiometry was found to be [Co(L-1(2))(TOPO)Cl] and [Co(L-1(2))(2)(TOPO)] at low and high concentration of the oximes, respectively. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：32 / 38

页数：7

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