Microcapsules containing ionic liquid [A336][P507] for La^(3+)/Sm^(3+)/Er^(3+)recovery from dilute aqueous solution  

作　　者：王月 王运东 靖宇 陈继 刘郁 

机构地区：[1]State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University [2]State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences

出　　处：《Journal of Rare Earths》2016年第12期1260-1268,共9页稀土学报（英文版）

基　　金：Project supported by the National Key Basic Research Program of China(2012CBA01203);the Specialized Research Fund for Doctoral Program of Higher Education of MOE of China(20130002110018);the State Key Laboratory of Chemical Engineering Key Program(SKL-Ch E-14T01)in the State Key Laboratory of Chemical Engineering of Tsinghua University

摘　　要：The efficacy of polysulfone microcapsules encapsulating ionic liquid [trialkylmethylammonium][di（2-ethylhelxyl） orthophosphinate]（[A336][P507]） for the extraction of La^3＋, Sm^3＋ and Er^3＋ from dilute aqueous solutions was investigated. Microcapsules were synthesized using coaxial microfluidic method, and subsequently encapsulated with extractant [A336][P507]. The kinetics data were fitted well by pseudo-second-order equation and Crank model, and the kinetics parameters were evaluated. The extraction rate had the order of Er^3＋Sm^3＋La^3＋. The isotherm data were analyzed by Langmuir model and shifted Langmuir model. The extraction capacities of La^3＋, Sm^3＋ and Er^3＋ were 58.4, 56.6 and 81.7 mg/g, respectively. The dependency of stripping performance on HNO3 concentration was measured. The regeneration of microcapsules was evaluated using cycling extraction experiments.The efficacy of polysulfone microcapsules encapsulating ionic liquid [trialkylmethylammonium][di（2-ethylhelxyl） orthophosphinate]（[A336][P507]） for the extraction of La^3＋, Sm^3＋ and Er^3＋ from dilute aqueous solutions was investigated. Microcapsules were synthesized using coaxial microfluidic method, and subsequently encapsulated with extractant [A336][P507]. The kinetics data were fitted well by pseudo-second-order equation and Crank model, and the kinetics parameters were evaluated. The extraction rate had the order of Er^3＋Sm^3＋La^3＋. The isotherm data were analyzed by Langmuir model and shifted Langmuir model. The extraction capacities of La^3＋, Sm^3＋ and Er^3＋ were 58.4, 56.6 and 81.7 mg/g, respectively. The dependency of stripping performance on HNO3 concentration was measured. The regeneration of microcapsules was evaluated using cycling extraction experiments.

关 键 词：rare earths extraction MICROCAPSULES [A336][P507] ionic liquid 

分 类 号：TF845[冶金工程—有色金属冶金]