Separation and solvent extraction of rare earth elements (Pr, Nd, Sm, Eu, Tb, and Er) using TBP and Cyanex 572 from a chloride medium

被引：33

作者：

Dashti, Somayeh ^{[1
,2
]}

Sadri, Farzaneh ^{[2
]}

Shakibania, Sina ^{[1
]}

Rashchi, Fereshteh ^{[1
]}

Ghahreman, Ahmad ^{[2
]}

机构：

[1] Univ Tehran, Coll Engn, Sch Met & Mat Engn, POB 11155-4563, Tehran, Iran

[2] Queens Univ, Robert M Buchan Dept Min, 25 Union St, Kingston, ON K7L 3N6, Canada

来源：

MINERALS ENGINEERING | 2021年 / 161卷

关键词：

Solvent extraction; Rare earth elements; TBP; Cyanex; 572; Synergism; Extraction mechanism; ACID; MIXTURE; PHOSPHATE;

D O I：

10.1016/j.mineng.2020.106694

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, synergistic effect of Cyanex 572 mixed with TBP on the extraction and separation of six selected light, medium and heavy rare earth elements (REE), namely neodymium (Nd), praseodymium (Pr), samarium (Sm), europium (Eu), terbium (Tb), and erbium (Er), from the chloride medium was investigated. The results demonstrated that sole TBP is not a suitable extractant for the separation of the REEs from the chloride media. However, Cyanex 572 was identified as a suitable extractant for the separation of heavy REEs, Er, and Tb. At initial pH (pHi) of 1.5, the mixture of 25% TBP + 75% Cyanex 572 extracted about 70% and 85% of Er and Tb, respectively. The separation factor (SF) results of some couples were noteworthy: SFEr/Pr = 30.08, SFEr/Nd = 29.95, SFTb/Pr = 12.22, SFTb/Nd = 12.16, SFEr/Sm = 9.96. Furthermore, the extraction mechanism of these two heavy REEs was studied using slope analysis and Fourier transform infrared measurements (FT-IR). The results showed that Er and Tb were extracted as ErCl2R(HR)(3)TBP and TbCl2R(HR)(3)TBP complexes (presumably R and HR refers to Cyanex 572), respectively. The FT-IR spectra confirmed these obtained results qualitatively.

引用

页数：10

共 38 条

[1] Solvent extraction of Eu(III) from hydrochloric acid solutions using PC88A and Cyanex 572 in kerosene
Agarwal, V
Safarzadeh, M. S.
Bendler, J. T.
[J]. HYDROMETALLURGY, 2018, 177 : 152 - 160
[2] Atwood D. A., 2012, RARE EARTH ELEMENTS
[3] Separation of americium(III) and europium(III) from nitrate medium using a binary mixture of cyanex-301 with n-donor ligands
Bhattacharyya, A
Mohapatra, PK
Manchanda, VK
[J]. SOLVENT EXTRACTION AND ION EXCHANGE, 2006, 24 (01) : 1 - 17
[4] Comparative studies on Y(III) and Dy(III) extraction from hydrochloric and nitric acids by Cyanex 572 as a novel extractant
El-Hefny, N. E.
Gasser, M. S.
Emam, Sh Sh
Mahmoud, W. H.
Aly, H. F.
[J]. JOURNAL OF RARE EARTHS, 2018, 36 (12) : 1342 - 1350
[5] Equilibrium and mechanism of samarium extraction from chloride medium using sodium salt of CYANEX 272
El-Hefny, N. E.
El-Nadi, Y. A.
Daoud, J. A.
[J]. SEPARATION AND PURIFICATION TECHNOLOGY, 2010, 75 (03) : 310 - 315
[6] Gajda B, 2007, PHYSICOCHEM PROBL MI, V41, P145
[7] Separation of Heavy Rare-Earth Elements from Light Rare-Earth Elements Via Solvent Extraction from a Neodymium Magnet Leachate and the Effects of Diluents
Gergoric, Marino
Ekberg, Christian
Steenari, Britt-Marie
Retegan, Teodora
[J]. JOURNAL OF SUSTAINABLE METALLURGY, 2017, 3 (03) : 601 - 610
[8] Highly Selective Extraction and Separation of Rare Earths(III) Using Bifunctional Ionic Liquid Extractant
Guo, Lin
Chen, Ji
Shen, Lu
Zhang, Jianping
Zhang, Dongli
Deng, Yuefeng
[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2014, 2 (08): : 1968 - 1975
[9] Solvent extraction of rare earth elements with mixtures of sec-octylphenoxy acetic acid and bis(2,4,4-trimethylpentyl) dithiophosphinic acid
Jia, Qiong
Tong, Shanshan
Li, Zhiying
Zhou, Weihong
Li, Hongfei
Meng, Shulan
[J]. SEPARATION AND PURIFICATION TECHNOLOGY, 2009, 64 (03) : 345 - 350
[10] Binary extraction of lanthanide(III) chlorides using carboxylates and dialkylphosphates of secondary and tertiary amines
Kalyakin, S. N.
Kuz'min, V. I.
Mulagaleeva, M. A.
[J]. HYDROMETALLURGY, 2015, 151 : 116 - 121

← 1 2 3 4 →