FEMD的离子交换行为及其离子筛法提取锂的研究

Studies on Ionic-exchange Behaviour of FEMD and Selective Adsorption of Lithium Ions by FEMD Ionic-sieve Method

采用碳电极,在90～95℃范围内,电解氯化锰溶液,制得纤维态电解二氧化锰(简称FEMD)。它是具有纤维态的Y-MnO_2,对于氯化物中的单种或混合阳离子具有交换性质。研究结果表明,以FEMD为基体所制得的锂型离子筛,可用于从海水中提取微量锂,有90％的锂被选择交换。

Fibrous electrolytic manganese dioxide (FEMD)was prepared from manganous chloride solution by electrolyzing at 90～95℃ with graphite anode. FEMD possesses fibrous state in y-MnO_2 type. FEMD has the exchange properties with cations in aqueous chloride solutions. A lithium type ionic-sieve made from FEMD substrate may be used from selective adsorption trace lithium from sea water with an efficiency of about 90％ yield.