Abstract
This study contains research on the sorption separation of scandium, zirconium, and titanium from acidic sulfate solutions by a novel monofunctional Purolite RUA21207 ion exchange resin with primary amino groups. The kinetic and equilibrium performance of Sc, Zr, Ti sorption has been investigated. The results revealed that sorption favored at 25 g L−1 H2SO4 in solution when the initial scandium concentration had been no more than 0.9 g L−1. Zirconium and titanium could be selectively eluted from the loaded resin with the solutions of 150 g L−1 KHF2 and 50 g L−1 HCl, respectively.In this work, the scandium concentrate generated from acid waste of titanium white production has been dissolved in 25 g L−1 H2SO4. Then, the solution has been passed through a column loaded with Purolite RUA21207 resin. Purification of scandium by 147 times that of zirconium and more than twice that of titanium have been achieved. Purolite RUA21207 resin has high potential application in the purification of scandium concentrate from Zr and Ti by sorption and definitely can be used for providing high purity scandium oxide.
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