Solvent extraction equilibria of copper and nickel with SME 529

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公開日
1984-10
権利情報
  • https://www.elsevier.com/tdm/userlicense/1.0/
DOI
  • 10.1016/0304-386x(84)90018-5
公開者
Elsevier BV

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Abstract Distribution equilibria in the extraction of copper and nickel from 1.0 mol/dm 3 aqueous ammonium nitrate solution by anti -2-hydroxy-5-nonylacetophenone oxime, the active species of SME 529, in MSB 210 diluent were studied at 30°C. The extraction equilibrium constants for copper and nickel were determined to be 1.9 × 10 1 and 3.2 × 10 5 , respectively. The aqueous solubility of the oxime was also examined, resulting in a measurement of the partition coefficient of the monomeric oxime between the aqueous and organic phases, its dissociation constant in the aqueous phase and its dimerization constant in the organic phase as 2.2 × 10 −4 , 0.53 nmol/dm 3 and 31 dm 3 /mol, respectively. It was found that the extraction of copper is decreased by the addition of p -nonylphenol due to adduct formation. The equilibrium constant of the adduct formation between the oxime and p -nonylphenol was determined to be 6.6 dm 3 /mol. It was observed that nickel is extracted by p -nonylphenol.

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