Kinetics and the difference for extraction of praseodymium and neodymium from nitrate aqueous solution by [A336][NO3] using the single drop technique

被引：0
作者：
Xiaoqin Wang [1 ,2 ]
Kun Huang [1 ,2 ]
Wenjuan Cao [2 ,3 ]
Pan Sun [2 ,3 ]
Weiyuan Song [2 ,3 ]
Huizhou Liu [2 ,3 ]
机构：
[1] School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
[2] CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences
[3] University of Chinese Academy of Sciences
来源：
Chinese Journal of Chemical Engineering | 2020年 / 28卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Praseodymium; Neodymium; A336][NO3; Kinetics; Single drop technique;
D O I：
暂无
中图分类号：
O658.2 [萃取法]; O614.33 [镧系元素（稀土元素）];
学科分类号：
070301 ; 070302 ; 081704 ;
摘要：
The kinetics and the difference for Pr(Ⅲ) and Nd(Ⅲ) extraction from nitrate aqueous solution using trialkylmethylammonium nitrate([A336][NO3]) as extractant were investigated by the single drop technique.The dependence of the extraction rate of Pr(Ⅲ) and Nd(Ⅲ) on the concentrations of free Pr(Ⅲ) and Nd(Ⅲ)ions, the concentrations of Na NO3and H+in aqueous solutions, and the concentrations of [A336][NO3] in kerosene solutions were discussed and the corresponding extraction rate equations for Pr(Ⅲ) and Nd(Ⅲ) were obtained. These equations demonstrated that the reaction rate constant of Pr(Ⅲ) with [A336][NO3] was double than that of Nd(Ⅲ). The effect of the addition of diethylenetriaminepentaacetic acid(DTPA) on the difference in the extraction rate of Pr(Ⅲ) and Nd(Ⅲ) by [A336][NO3] was also investigated. It was revealed that the difference in the complex formation rates of Pr(Ⅲ) and Nd(Ⅲ) with DTPA made a significant impact on the difference in the extraction rates of Pr(Ⅲ) and Nd(Ⅲ) with [A336][NO3]. The ratio of extraction rates of Pr(Ⅲ) to Nd(Ⅲ) with[A336][NO3] was in proportion to the ratio of complex formation rates of Pr(Ⅲ) to Nd(Ⅲ) with DTPA. The extraction rate difference for Pr(Ⅲ) and Nd(Ⅲ) with [A336][NO3] increased due to a higher complex formation rate constant of DTPA with the free and un-complexed Nd(Ⅲ) ions in the aqueous nitrate solution than that with Pr(Ⅲ) ions. Therefore, the addition of DTPA in the aqueous nitrate solution is an effective method to intensify the separation of Pr(Ⅲ) and Nd(Ⅲ) in kinetics. The study on the extraction mechanism indicated that both the extraction of Pr(Ⅲ) and Nd(Ⅲ) by [A336][NO3] were diffusion controlled, and the reactions obeyed SN2 mechanism. The present work highlights a possible approach to strengthen the kinetic separation of Pr(Ⅲ) and Nd(Ⅲ).
引用
收藏
页码：1326 / 1333
页数：8
相关论文
共 21 条
  • [1] 季铵盐萃取分离镨钕及其机理的研究(Ⅱ)——硝酸甲基三烷基铵-DTPA络合交换萃取分离镨钕
    徐光宪
    黄春辉
    金天柱
    李标国
    [J]. 北京大学学报(自然科学版), 1979, (03) : 81 - 89
  • [2] Recovery of yttrium and neodymium from copper pregnant leach solutions by solvent extraction[J] . J. Brent Hiskey,Rebecca Grace Copp.Hydrometallurgy . 2018
  • [3] Solvent extraction kinetics of Sm(Ⅲ),Eu(Ⅲ) and Gd(Ⅲ) with 2-ethylhexyl phosphoric acid-2-ethylhexyl ester
    Zhuo Chen
    Yundong Wang
    [J]. ChineseJournalofChemicalEngineering, 2018, 26 (02) : 317 - 321
  • [4] Equilibrium and kinetics of uranium（VI） extraction from a sulfate leach liquor solution by Alamine 336 using single drop technique[J] . Fereshte Khanramaki,Amir Saeed Shirani,Jaber Safdari,Rezvan Torkaman.Chemical Engineering Research and Design . 2017
  • [5] Extraction kinetics of lithium ions by N,N- bis （2-ethylhexyl）acetamide from simulated brine using rising single drop method[J] . Hui-fang Li,Li-juan Li,Dong Shi,Jin-feng Li,Lian-min Ji,Xiao-wu Peng,Feng Nie,Fu-gen Song,Zhong-min Zeng.Hydrometallurgy . 2015
  • [6] Kinetics of Forward Extraction of V（IV） in V（IV）-SO2-4（H+, NA+）-Cyanex 302-Kerosene System Using Lewis Cell Technique[J] . Ranjit Biswas,Aneek Karmakar.Chemical Engineering Communications . 2015 (2)
  • [7] Extraction kinetics of niobium by tertiary amine N235 using Lewis cell[J] . Xiuli Yang,Junwei Zhang,Xihui Fang.Hydrometallurgy . 2015
  • [8] Extraction Kinetics of Lanthanum in Chloride Medium by Bifunctional Ionic Liquid[A336][CA-12] Using a Constant Interfacial Cell with Laminar Flow[J] . Hualing Yang,Ji Chen,Wei Wang,Hongmin Cui,Dongli Zhang,Yu Liu.Chinese Journal of Chemical Engineering . 2013
  • [9] The effective recovery of praseodymium from mixed rare earths via a hollow fiber supported liquid membrane and its mass transfer related[J] . Pharannalak Wannachod,Srestha Chaturabul,Ura Pancharoen,Anchaleeporn W. Lothongkum,Weerawat Patthaveekongka.Journal of Alloys and Compounds . 2010 (2)
  • [10] Study on separation technology of Pr and Nd in D 2 EHPA-HCl-LA coordination extraction system[J] . Shaohua YIN,Wenyuan WU,Bo ZHANG,Fengyun ZHANG,Yao LUO,Shiwei LI,Xue BIAN.Journal of Rare Earths . 2010
123