Ak. Pyartman et al., MUTUAL INFLUENCE OF TRIVALENT RARE-EARTHS ON THEIR EXTRACTION BY TRI-N-BUTYLPHOSPHATE FROM MULTICOMPONENT NITRATE SOLUTIONS, Soviet radiochemistry, 34(6), 1992, pp. 678-683
Extraction of nitrates of trivalent rare earths of the yttrium subgrou
p and Y(III) from multicomponent solutions by tri-n-butylphosphate at
298.15 K and pH 2 is studied. Physicochemical and mathematical models
describing the distribution and mutual influence of the lanthanides (S
m-Lu) and Y(III) in multicomponent solutions as a function of the tota
l aqueous concentration of rare earths and concentrate compositions ar
e presented.