Stoichiometry of liquid-liquid extraction of nickel and cobalt by LIX63

D. R. Renninger; Kwadwo Asare Osseo-Asare

doi:10.1007/BF02670867

Stoichiometry of liquid-liquid extraction of nickel and cobalt by LIX63

D. R. Renninger, Kwadwo Asare Osseo-Asare

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Abstract

Distribution and spectrophotometric studies were conducted in order to characterize and identify the nickel and cobalt complexes extracted by LIX63 (H₂Ox). The extraction of these metals was found to proceed by a varied and complicated process. Nickel is initially extracted as Ni(HOx)₂ which subsequently converts to Ni(HOx) (H₂Ox)₂⁺ . The equilibrium position between these two complexes depends upon the pH of the adjacent aqueous phase. Formation of Ni(HOx)₂ is favored at pH > 4.5 and conversion to Ni(HOx) (H₂Ox)₂⁺ is favored at lower pH. These two extractable species may fit into a reaction scheme that also involves the complexes Ni(HOx)₂(H₂Ox) and Ni(H₂Ox)₃²⁺ . The extraction of cobalt by LIX63 first forms Co(HOx)₂ which apparently slowly oxidizes to Co(HOx)₂(H₂Ox)⁺.

Original language	English (US)
Pages (from-to)	41-47
Number of pages	7
Journal	Metallurgical Transactions B
Volume	14
Issue number	1
DOIs	https://doi.org/10.1007/BF02670867
State	Published - Mar 1 1983

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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title = "Stoichiometry of liquid-liquid extraction of nickel and cobalt by LIX63",

abstract = "Distribution and spectrophotometric studies were conducted in order to characterize and identify the nickel and cobalt complexes extracted by LIX63 (H2Ox). The extraction of these metals was found to proceed by a varied and complicated process. Nickel is initially extracted as Ni(HOx)2 which subsequently converts to Ni(HOx) (H2Ox) 2 + . The equilibrium position between these two complexes depends upon the pH of the adjacent aqueous phase. Formation of Ni(HOx)2 is favored at pH > 4.5 and conversion to Ni(HOx) (H2Ox) 2 + is favored at lower pH. These two extractable species may fit into a reaction scheme that also involves the complexes Ni(HOx)2(H2Ox) and Ni(H2Ox) 3 2+ . The extraction of cobalt by LIX63 first forms Co(HOx)2 which apparently slowly oxidizes to Co(HOx)2(H2Ox)+.",

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T1 - Stoichiometry of liquid-liquid extraction of nickel and cobalt by LIX63

AU - Renninger, D. R.

AU - Osseo-Asare, Kwadwo Asare

PY - 1983/3/1

Y1 - 1983/3/1

N2 - Distribution and spectrophotometric studies were conducted in order to characterize and identify the nickel and cobalt complexes extracted by LIX63 (H2Ox). The extraction of these metals was found to proceed by a varied and complicated process. Nickel is initially extracted as Ni(HOx)2 which subsequently converts to Ni(HOx) (H2Ox) 2 + . The equilibrium position between these two complexes depends upon the pH of the adjacent aqueous phase. Formation of Ni(HOx)2 is favored at pH > 4.5 and conversion to Ni(HOx) (H2Ox) 2 + is favored at lower pH. These two extractable species may fit into a reaction scheme that also involves the complexes Ni(HOx)2(H2Ox) and Ni(H2Ox) 3 2+ . The extraction of cobalt by LIX63 first forms Co(HOx)2 which apparently slowly oxidizes to Co(HOx)2(H2Ox)+.

AB - Distribution and spectrophotometric studies were conducted in order to characterize and identify the nickel and cobalt complexes extracted by LIX63 (H2Ox). The extraction of these metals was found to proceed by a varied and complicated process. Nickel is initially extracted as Ni(HOx)2 which subsequently converts to Ni(HOx) (H2Ox) 2 + . The equilibrium position between these two complexes depends upon the pH of the adjacent aqueous phase. Formation of Ni(HOx)2 is favored at pH > 4.5 and conversion to Ni(HOx) (H2Ox) 2 + is favored at lower pH. These two extractable species may fit into a reaction scheme that also involves the complexes Ni(HOx)2(H2Ox) and Ni(H2Ox) 3 2+ . The extraction of cobalt by LIX63 first forms Co(HOx)2 which apparently slowly oxidizes to Co(HOx)2(H2Ox)+.

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Stoichiometry of liquid-liquid extraction of nickel and cobalt by LIX63

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