Neodymium naphthenate-loaded organic phase stripping using sodium oxalate

作     者：Jieying Zhou Dongying Chen Fei Niu Jikai Zhang Xiaomi Hu Ying Wu Youming Yang Shili Zheng Jieying Zhou;Dongying Chen;Fei Niu;Jikai Zhang;Xiaomi Hu;Ying Wu;Youming Yang;Shili Zheng

作者机构：Key Laboratory of Development and Application of Ionic Rare Earth Resources(Jiangxi University of Science and Technology)Ministry of EducationGanzhou 341000China Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China Ganzhou Nonferrous Metallurgy Research InstituteGanzhou 341000China Innovation Academy for Green ManufactureChinese Academy of SciencesBeijing 100190China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2022年第40卷第6期

页      面：965-973,I0005页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：Project supported by the Cultivation Project of the State Key Laboratory of Green Development and High-value Utilization of Ionic Rare Earth Resources in Jiangxi Province(20194AFD44003) 

主　　题：Neodymium naphthenate Precipitation Saponification Sodium oxalate Stripping Rare earths 

摘      要：Neodymium naphthenate-loaded organic phase stripping using sodium oxalate solution was studied to explore the feasibility of synchronous rare earth-loaded organic phase stripping,rare earth precipitation,and blank organic phase *** results show that loaded organic phase stripping,rare earth precipitation,and blank organic phase saponification can be realized *** using 20% excess of sodium oxalate over the stoichiometry with the volume ratio of organic phase to aqueous phase of 1:1 at 25℃ for 40 min,the single stage stripping rate and saponification value are about 40% and 0.29 mol/L,*** 16 stages of countercurrent continuous stripping,the stripping rate of neodymium can reach 99%,the saponification value is 0.42 mol/L,the Nd^(3+) concentration in saponified organic phase is less than 0.0020 mol/L,and the main phase in precipitation isNd_(2)(C2 O_(4))3·10 H_(2) ***,this saponified organic phase can be used in the extraction of NdCl_(3) solution,and then the loaded organic phases(neodymium naphthenate) with 0.16 mol/L Nd^(3+) can be *** morphology,particle size distribution,and composition of theNd_(2)(C2 O_(4))3·10 H_(2) O products are similar to those of the current direct precipitation *** neodymium oxide prepared by continuous calcination of neodymium oxalate meets the national standard of China(GB/T 5240-2015).These results prove the feasibility of stripping neodymium naphthenate-loaded organic phase by using sodium oxalate *** oxalate can serve as a stripping agent,a saponifier,and a precipitator,thereby simplifying rare earth extraction and *** study provides theoretical and technical support for the development of a novel method for rare earth extraction and separation.