Collect. Czech. Chem. Commun.
1980, 45, 3116-3129
https://doi.org/10.1135/cccc19803116
Extraction of iron(III) from the citric medium by the toluene solution of trilaurylamine
Petr Vaňura and Libor Kuča
Nuclear Research Institute, 250 68 Řež
Abstract
The composition of Fe(III) complexes extracted from the aqueous phase of constant ionic strength (1M-(H3,Na3,Fe)A, where H3A denotes citric acid) by the toluene solution of trilaurylamine (TLA) has been determined and the respective extraction constants have been calculated. In the concentration range cFe < 10-2 mol l-1 FeA(TLA)2 and FeA(TLA)4(H3A)2-4 are the predominant complexes in the organic phase. The abundance of the (FeA)3(TLA)6(H3A)2 complex in the organic phase increases at higher equilibrium concentrations of Fe(III) in the aqueous phase and at higher concentrations of TLA.
