Recovery of Uranium, Thorium, and Other Rare Metals from Eudialyte Concentrate by a Binary Extractant Based on 1,5-bis[2-(hydroxyethoxyphosphoryl)-4-ethylphenoxy]-3-oxapentane and Methyl Trioctylammonium Nitrate

Eudialyte-group minerals are of scientific interest as important concentrators rare elements (mainly Zr and REE) in agpaitic alkaline rocks a potential source REE, Zr, Hf, Nb, Ta for industrial use. Extraction uranium(VI), thorium(IV), zirconium(IV), hafnium(IV), titanium(IV), scandium(III) by binary extractant based on 1,5-bis[2-(hydroxyethoxyphosphoryl)-4-ethylphenoxy]-3-oxapentane methyl trioctylammonium nitrate from eudialyte breakdown solutions is studied. isotherms were obtained exhaustive extraction was investigated. It shown that uranium, thorium, hafnium, zirconium, scandium, titanium almost completely recovered two-stage mixture methyltrioctylammonium 1,2-dichloroethane. Quantitative characteristics compared scandium(III). the efficiency metals 1,2-dichloroethane much higher comparison with commercially available tributyl phosphate.