Extraction of metal chloride complexes by phosphoryl-containing podands

Extraction of Ti, Mn, Co, Ni, Cu, Zn, Ga, Y, Zr, Nb, Mo, Ag, Cd, In, Sn, Sb(III), Te(IV), La, Ta, W, Hg, Tl(III), Pb and Bi from hydrochloric acid solutions by a series of phosphoryl-containing podands with various terminal groups and oxygen bridges of different lengths has been investigated. The extraction results are discussed in relation to different diluents (nitrobenzene, dichloroethane, CHCl3, CCl4, toluene) and to the structure of the podands under study. It has been shown that the control over the podand structure and the nature of the diluents used allows wide-range variations of the metal chloride complexes extractability. 28 refs., 3 figs., 6 tabs