CHELATING ION-EXCHANGE PROPERTIES OF 2-HYDROXY-4-METHOXYACETO-PHENONEOXIME THIOUREA TRIOXANE RESINS

The resin (HMOTT') prepared by condensation of 2-hydroxy-4-methoxy-acetophenoneoxime and thiourea with trioxane in the presence of acid catalyst, proved to be a selective chelating ion-exchange resin for certain metals. Chelating ion-exchange properties of this resin were studied for Cu2+, Ni2+, Co2+, Mn2+, Zn2+, Fe3+ and UO22+ ions. A batch-equilibration method was employed in the study of the selectivity of metal-ion uptake involving the measurement of the distribution of a given metal ion between the resin sample and a solution containing the metal ion. The study was carried out over a wide pH range and in media of various ionic strengths. The resin showed a higher selectivity for Cu2+, Fe3+ and UO22+ ions than for Mn2+, Co2+ and Zn2+ ions.