Determination of the mutual entrainment of the extractant and the aqueous phase in the extraction of rare-earth elements from the technological phosphoric acid solution

The data on the distribution of orthophosphoric acid in the system di - (2-ethylhexyl) phosphoric acid (D2EHPA) - H₃PO₄ - H₂O was obtained. The mutual losses of the extractant and the aqueous phase in the extraction of rare-earth elements occur from phosphoric acid using D2EHPA. The quantitative characteristics of redistribution between the aqueous and organic phases was determined. The composition of solvates in extracts was established at different equilibrium concentrations of orthophosphoric acid in the aqueous phase. The obtained data allow us to make changes in the technological process, which will allow us to obtain cleaner REEs after extraction and reduce the concentration of extractant in water effluents.