SULFUR ANALOGS OF IMIDODIPHOSPHORIC ACID AS EXTRACTANTS
The distribution of Ag, Zn, Cd, Sc, Eu, Hg, and Hf between mineral acids (HNO 3 , HCl) and benzene solutions of selected sulfur derivatives of organophosphoric reagents containing the P(X)NHP(X) or (RO 3 )PS group (X = O, S) was examined. The effect of the organic solvent was also investigated for Hg and some of the reagents. The composition of the complexes extracted was identified, and the corresponding extraction constants were calculated.