A simple graphical method for determination of thermodynamic equilibrium constants, developed for ion-exchange and solvent
extraction processes, was successfully applied to a liquid exchangersystem. Close values of the thermodynamic equilibrium
constants for the system uranyl chloride—hydrochloric acid—di-2-ethylhyxyl phosphoric acid—toluene (K=7.8±0.8) were obtained
when the ionic strength of the aqueous phase was varied and the concentration of di-2-ethylhexyl phosphoric acid in the organic
phase was kept constant, and vice versa.
Authors:Z. Maksimović, D. Misković, M. Kopečni, J. Živanov, and R. Halaši
Solvent extraction of 3,5-dinitrosalicylic (3,5-DNS) and 2-oxy-5-nitropyridinic (2-O-5-N-Py) acids and their Ni(II), Co(II)
and Cu(II) complexes from sulphuric acid medium with TBP and TOPO in n-hexane was investigated. The compositions of the extractable
species were determined by slope analysis. Possible utilization in separation processes is discussed in general.