用壳聚糖膜制备高纯钪

MANUFACTURING HIGH PURE Sc_2O_3 BY CHITIN MEMBRANE

钪是一种典型的稀散元素，几乎总是以痕量状态与黑钨矿、钛铁矿和稀土矿伴生在一起，所以提取钪很困难，制备高纯钪更是困难．本文研究高纯氧化钪的制备．将纯度为９９％的氧化铁中的杂质钛、铁、钙、镁、锰、铝分两部分离。先用壳聚糖膜的电渗析法除去钛和铁，再用溶剂萃取法除去余下的钙、镁、锰和铝．实验考察壳聚糖膜经四级电渗析除去ＴｉＯ２＋和Ｆｅ２＋，对Ｓｃ３＋的回收也进行认真的考察．研究结果表明．四级电渗析分离后，溶液中的Ｔｉｄ２＋和Ｆｅ２＋可全部除去，Ｓｃ３＋的损失仅为０．０１％．

The manufacturing high pure Sc2O3 by chitin membrane was examined. Sc2O3 has contained 1% of impurities, such as Ti,Fe,Ca,Mg,Mn and Al. Titanium and aron were removed by electrodialysis method of chitin membrane, and other bounties by solvent extraction. In experiments, four-stage electrodialysis was used to remove TiO2+ and Fe2+. The result showed that TiO2+ and Fe2+ were all removed , and liss of Sc3+ wasonly 0.01% through four-stage electrodialysis.