EXTRACTION OF COMPLEXES OF SOME METALS WITH 1,1-DISUBSTITUTED 3-DIPHENOXYTHIOPHOSPHORYLTHIOUREAS

The extraction of complexes of silver, mercury, cadmium, cobalt, zinc, scandium and some rare earth elements (Ln) into benzene solutions of 1.1-disubstituted 3-diphenoxythiophosphorylthioureas (HA) containing a lkyl and aryl substituents was examined using the radiotracer techniqu e. The complexes AgA(HA), HgA2, CdA2 and LnA3 are extracted into the o rganic phase. and the extraction increases in order Co, Zn, Cd almost- equal-to Ln much less than Hg < Ag. The extraction constants were calc ulated. During the extraction process using medium acidic aqueous phas es (1 M HNO3), the reagents decompose into the corresponding amines an d (PhO)2P(S)NCS.