Solvent extraction of scandium from leaching solution of red mud roasted with ammonium sulfate using D2EHPA/TBP  

作　　者：Fucheng Li Xinsheng Li Lei Shi Xiang Li Duoqiang Liang Yuezhou Wei Toyohisa Fujita 

机构地区：[1]School of Resources,Environment and Materials,Guangxi University,Nanning,530004,China [2]State Key Laboratory of Featured Metal Materiais and Life-for Composite Structures,Guangxi University,Nanning,530004,China [3]School of Nuclear Science and Technology,University of South China,Hengyang,421001,China

出　　处：《Journal of Rare Earths》2024年第10期1943-1949,共7页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(52064002);Guangxi Zhuang Autonomous Region Administration for Market Regulation(GSJKJZC2022-9)。

摘　　要：Red mud is an important secondary resource for scandium production.The red mud leaching solution containing scandium in this study was derived from environmentally friendly ammonium sulfate roasting and water leaching process.A synergistic extraction with a mixture of di(2-ethylhexyl)phosphate acid(D2EHPA)and tributyl phosphate(TBP)for recovery of scandium from red mud leaching solution is proposed.The effects of D2EHPA concentration,H_(2)SO_(4)concentration,rare earth elements,dosage of TBP,phase ratio(A/O),contact time and H_(2)O_(2)concentration on scandium extraction were investigated.The results show that more than 99%scandium is extracted under the optimal conditions while Fe,Al,Ti,Ca and rare earth elements(Ce,Y,La,Nd,Er,etc.)are hardly extracted.The stripping efficiency of Sc reaches above 92.37%under the optimal stripping conditions of 5 mol/L NaOH with an A/O of 1 at 90℃for 30 min.The proposed technology could provide an effective method for extraction of scandium from red mud leaching solution.

关 键 词：SCANDIUM Red mud leaching solution D2EHPA/TBP Solvent extraction Rare earths 

分 类 号：TF845.1[冶金工程—有色金属冶金]