ANION-EXCHANGE AND LIGAND-EXCHANGE STUDIES ON THORIUMTETRACYCLOHEXYLAMINE

A new ion exchanger, thoriumtetracyclohexylamine, was synthesised under different conditions. The material was characterized by determination of chemical and physical properties, such as anion-exchange capacity, sorption capacity, distribution coefficient values, composition, and chemical and thermal stability. Anion-exchange equilibria on this material were also studied. The values of selectivity coefficients SCN** minus , MnO//4** minus , and Cl** minus and CrO//4**2** minus were measured using equilibrium experiments at constant ionic strength and at different temperatures from 30 to 60 degree C. The thermodynamic equilibrium constants are reported.