STUDY ON THE EXTRACTION SEPARATION OF Rh FROM Pt,Pd,Ir BY RADIOTRACER METHOD——PURIFICATON OF Rh

In this work the extraction of Pt, Pd, Ir by TOA-kerosin under different conditions is studied. In HC1 medium of low acidity Rh is quantitatively separated from Pt, Pd, Ir by TOA-kerosin as extractant. The equilibrium time of extraction is short and the split phase rate is fast. The extractant can be used by cyclic regeneration. By this method, the purity of metal product Rh is about>99%.