Removal of impurities from scandium solutions by ion exchange

用离子交换法去除含钪溶液中的杂质（英文）

A process of removing impurities,such as Fe,Zr,Ti,Al,Si,from scandium solution by ion exchange was proposed.Various resins’selectivity was studied in scandium chloride solution.The results indicated that D851resin had high selectivity of Sc at low acidity,and high selectivity of Zr at high acidity;D370resin had high selectivity of Fe and Si in high acidity.A new technical process of removing impurities from scandium chloride solution was proposed,which includes D370resin adsorbing Fe in high acidity,D851resin adsorbing Zr in medium acidity and D851resin adsorbing Sc at low acidity.Flow experimental results show that removal rates of Al,Ca,Fe,Zr,Ti and Si,were100%,99.6%,100%,100%,99.5%and100%respectively.

提出一种用离子交换深度净化钪溶液的工艺,以去除钪溶液中的铁、锆、钛、铝、钙、硅等杂质。研究了在氯化钪溶液中各种树脂的选择性,结果表明,在弱酸条件下,D851树脂对钪具有很强的选择性,随着酸浓度的升高,D851树脂对锆的选择性急剧增强,同时,D370树脂对铁和硅的选择性也随之增强。为此,提出了D370高酸除铁—D851中酸除锆—D851弱酸吸附钪的净化除杂工艺。该工艺处理后,铝、钙、铁、锆、钛、硅的去除率分别为100%、99.6%、100%、100%、99.5%、100%。