Liquid–liquid separation of copper and nickel ammine complexes using phenolic oxime mixture with tributyl phosphate

IF 1.5 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Geosystem Engineering Pub Date : 2023-03-04 DOI:10.1080/12269328.2023.2187887

S. Ilyas, R. Srivastava, Suhyeon Jin, Hyunjung Kim

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引用次数: 6

Abstract

ABSTRACT In the present study, a complete separation of copper over nickel has been studied from an ammoniacal leach liquor of nickel laterite ore generated via the Caron process. For this purpose, a phenolic oxime (LIX 84-IC) used as the extractant molecule was mixed with tributyl phosphate (TBP) to inhibit the co-extraction of nickel with copper loading into the organic phase. The antagonistic effect of TBP was confirmed by the distribution coefficients to be D mix << D LIX 84-IC + D TBP and negative values of ∆D. The highest separation (β Cu/Ni) of >1329 was yielded using the molar ratio of organic mixture at LIX 84-IC:TBP = 0.4:0.6 at an organic-to-aqueous phase ratio of 1. The thermodynamic properties of copper extraction exhibited an endothermic nature with ΔH° value of 5.4 kJ∙mol−1, indicating the formation of inner-sphere coordination between metal ions and the organic mixture. Further, the stripping of copper from the loaded organic phase was quantitatively achieved by contacting with 1.0 mol∙L−1 H2SO4 solution at the unit phase ratio.

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用磷酸三丁酯混合酚肟液-液分离铜镍胺配合物

摘要本研究从Caron法生产的红土镍矿氨浸液中对铜和镍进行了完全分离。为此，将苯酚肟(LIX 84-IC)作为萃取剂分子与磷酸三丁酯(TBP)混合，以抑制镍与铜负载共萃取到有机相中。在LIX 84-IC中，有机混合物的摩尔比为:TBP = 0.4:0.6，有机水相比为1时，得到了D混合物1329。铜萃取物的热力学性质为吸热性质，ΔH°值为5.4 kJ∙mol−1，表明金属离子与有机混合物之间形成了球内配位。此外，通过以单位相比接触1.0 mol∙L−1 H2SO4溶液，定量地实现了铜从负载有机相中的剥离。

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来源期刊

Geosystem Engineering GEOSCIENCES, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

0.00%

发文量