Extraction of Complexes of Some Metals with 1,1-Disubstituted 3-Diphenoxythiophosphorylthioureas

Abstract

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 alkyl and aryl substituents was examined using the radiotracer technique. The complexes AgA(HA), HgA 2 , CdA 2 and LnA 3 are extracted into the organic phase, and the extraction increases in order Co, Zn, Cd ≈ Ln << Hg < Ag. The extraction constants were calculated. During the extraction process using medium acidic aqueous phases (1 M HNO 3 ), the reagents decompose into the corresponding amines and (PhO) 2 P(S)NCS.