Extraction of fluoride metal complexes by octanols

The extraction of niobium(V) and tantalum(V) by octanols, including 1-octanol, 2-octanol, and isooctanol (2-ethylhexanol), was studied. The composition of the octanols and their solubility in various aqueous solutions were evaluated. The capacity of the octanols for tantalum(V) and niobium(V), the extraction properties of the octanols, the viscosity of extracts under conditions of metal fluoride extraction, and the temperature dependence of the viscosity of the octanols were studied. The composition of the extracted complexes was studied by IR and NMR spectroscopy and chemical analysis, and the hydration-solvation mechanism of the extraction of tantalum(V), niobium(V), and titanium(IV) was supported.