Liquid-liquid separation of copper and nickel ammine complexes using phenolic oxime mixture with tributyl phosphate
- Authors
- Ilyas, Sadia; Srivastava, Rajiv Ranjan; Jin, Suhyeon; Kim, Hyunjung
- Issue Date
- Mar-2023
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- Solvent extraction; Ammoniacal leach liquor; Laterite ore; Metal ammine complexes; Antagonistic extraction
- Citation
- GEOSYSTEM ENGINEERING, v.26, no.2, pp.58 - 66
- Indexed
- SCOPUS
KCI
- Journal Title
- GEOSYSTEM ENGINEERING
- Volume
- 26
- Number
- 2
- Start Page
- 58
- End Page
- 66
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/191051
- DOI
- 10.1080/12269328.2023.2187887
- ISSN
- 1226-9328
- 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 << DLIX 84-IC + D-TBP and negative values of increment D. The highest separation (beta(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 Delta H degrees value of 5.4 kJ center dot 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 center dot L-1 H2SO4 solution at the unit phase ratio.
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