Z. Lazarova, M. Lazarova:
"Solvent Extraction of Copper from Nitrate Media with Chelating LIX-Reagents: Comparative Equilibrium Study";
Solvent Extraction and Ion Exchange,
Comparative experimental studies were carried out on extraction of copper (II) cations from aqueous acid nitrate media using four LIX-reagents, representatives of different extractant classes: LIX 984N-I, LIX 860N, LIX 84-I and LIX 65N. As a diluent, the liquid hydrocarbon undecane was used.
The extraction behaviour of the LIX-reagents was compared based on analysis of the influence of main factors on the two-phase mass transfer process: aqueous pH-value, initial copper and extractant concentrations and temperature. The experimental data received were used in calculation of important parameters characterising the efficiency of copper extraction from nitrate media with different LIX reagents: distribution ratios D, concentration extraction constants Kex, pH0,5-values and thermodynamic parameters such as enthalpy, entropy and free energy changes (Ho, So, Go-values).
solvent extraction, LIX reagents, extraction equilibrium, copper, water purification
Erstellt aus der Publikationsdatenbank des AIT Austrian Institute of Technology.