발간논문

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Vol.38, No.7, 946 ~ 951, 2000
Title
Pesearch Paper / Hydrometallurgy : A Thermodyanmic Model on the solvent Extraction of Zinc with D2EHPA from Sulfuric Acid Solutions
이만승Man Seung lee,이응조Eung Cho Lee
Abstract
A thermodynamic model of chemical equilibria with mass and charge balance equations has been developed for the solvent extraction of ZnSO₄-H₂SO₄-H₂O-D2EHPA-kerosene system. The activity coefficients of all solutes in the aqueous phase were calculated by Pitzer`s equation. By applying present model, the equilibrium concentrations of solutes could be calculated from the stoichiometric concentrations of aqueous phase and pH. The extracted metal species and extraction equilibrium constant were found to be ZnHA₃ and 9.77×10^(-2) from the slope analysis of the equilibrium extraction data. The predicted distribution coefficients of zinc were in good agreement with experimental results.
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