WaterSolutions Separation of Group IIIB from Liquid Media

Water/Wastewater: Scandium and yttrium are generally present as cations, so a strong acid cation resin is the separation media of choice. Sc and Y have a high affinity for a strong acid cation resin under dilute acid conditions that diminish at about 4 M HCl then again increase as acid concentration increases further (1). Often these metals are being separated from other closely associated metals so resins with the maximum number of theoretical plates are needed. Strong acid cation fine mesh resins like DOWEX™ 50WX8, 100-200 or DOWEX 50WX4, 100-200 resins are proposed for this separation.