The synthesis and properties of some chelating ion exchangers.

A series of oxine containing polymers, prepared by condensation techniques and by the coupling of oxine to diazotised poly(amino-styrenes), have been investigated in terms of their total capacities for Co(II), Ni(II), Cu(II),Zn(II), Al(III), and UO(Il) as a function of pH and their rates of equilibration with, solutions of metal ions. Other chelating polymers containing salicylic acid, alizarin or pyridyl azo resorcinol as the functional group have also been examined to determine their behaviour with the same six metals. An attempt to determine the magnitude of the stability constants for the metal-resin complexes, uranyl and copper-poly styrene chelates, has been made. It has been shown that the uranyl values lie somewhat lower than the stability constants of the corresponding metal-monomor complexes, whilst the copper values are of the same order as the corresponding metal-nonomer complex.