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Home  >  Journal list  >  MATERIALS TRANSACTIONS  >  Vol.42  No.12 (2001)  >  pp.2548-2552

MATERIALS TRANSACTIONS
<<Previous article Vol.42  No.12 (2001)   pp.2548 - 2552 Next article>>

Modeling of Solvent Extraction of Zinc from Sulphate Solutions with D2EHPA

Man-Seung Lee1), Jong-Gwan Ahn2) and Seong-Ho Son3)
1) Department of Advanced Materials Science and Engineering, Mokpo National Univ.
2) Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources
3) LG Cable Ltd., Technology & Development Team


A thermodynamic model based on chemical equilibria with mass and charge balance equations has been developed for the solvent extraction system consisting of ZnSO4–H2SO4–H2O-D2EHPA-kerosene. The activity coefficients of all solutes in the aqueous phase were calculated by Pitzer’s equation. By applying this model, the equilibrium concentrations of solutes were calculated from the concentration of zinc and pH . The extracted metal species was ZnHA3 and extraction equilibrium constant was found to have a value of 9.77×10−2 from the slope of the equilibrium extraction data. The predicted distribution coefficients of zinc were in good agreement with experimental results.


Keyword:
extraction model, zinc, D2EHPA, pitzer, sulfuric acid

Received: July 09, 2001
Accepted: September 20, 2001 , Published online: September 06, 2005
Copyright (c) 2005 The Japan Institute of Metals

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