Abstract
Data were obtained on the composition of saturated Mo solutions in HNO3 solutions of various concentrations at various temperatures, with a maximum at 5 M HNO3. Extraction of Mo from such solutions of low acidity with concentrated solutions of TBP in xylene at room temperature was studied, and the IR spectra of the extract were measured. The extractability of Mo in the supersaturation region sharply decreases with a decrease in the TBP concentration and with an increase in the acidity of the aqueous phase. The kinetics of the Mo extraction is described by a first-order rate equation. The process apparently involves formation of molybdic acid in the aqueous phase by the reaction MoO2(OH)+ + H2O = H2MoO4 + H+. It is assumed that H2MoO4 dissolves in water present in TBP, instead of precipitating from the aqueous phase.
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