Solvent extraction of metal ions and separation of nickel(II) from other metal ions by organophosphorus acids

被引：55

作者：

Binghua, Y ^{[1
]}

Nagaosa, Y ^{[1
]}

Satake, M ^{[1
]}

Nomura, A ^{[1
]}

Horita, K ^{[1
]}

机构：

[1] FUKUI UNIV,FAC ENGN,BUNKYO KU,FUKUI 910,JAPAN

来源：

SOLVENT EXTRACTION AND ION EXCHANGE | 1996年 / 14卷 / 05期

关键词：

D O I：

10.1080/07366299608918372

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Such physicochemical properties of bis(2-ethylhexyl)phosphinic acid, 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester and bis(2-ethylhexyl)phosphoric acid as the solubilities and the dissociation constants in water, the dimerization constants in organic solvent and distribution constants in organic solvent-water were examined by a potentiometric two-phase titration. The solvent extraction of seven kinds of transition metal ions and magnesium(II) from aqueous sulfate media was studied with the three organophosphorus acids. The pH1/2 values obtained were discussed in terms of the separation efficiency between nickel(II) and the other metal ions. Bis(2-ethylhexyl)phosphinic acid was found to exhibit the best separation efficiency compared with the other two extractants. As a practical application, the purification of unrefined nickel sulfate solution containing the other metal ions as impurities with three extractants was studied by the sequential multistage extraction method with a separatory funnel.

引用

页码：849 / 870

页数：22

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