N263在亚硝酸盐介质下从废锂离子电池正极材料浸出液中萃取分离钴

杨颖男; 杨英杰; 何春林; 韦悦周; Toyohisa Fujita; 王桂芳; 马少健; 杨文超

doi:10.1007/s12613-022-2571-8

Volume 30 Issue 5

May 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(5): 897-907

Yingnan Yang, Yingjie Yang, Chunlin He, Yuezhou Wei, Toyohisa Fujita, Guifang Wang, Shaojian Ma, and Wenchao Yang, Solvent extraction and separation of cobalt from leachate of spent lithium-ion battery cathodes with N263 in nitrite media, Int. J. Miner. Metall. Mater., 30(2023), No. 5, pp. 897-907. https://doi.org/10.1007/s12613-022-2571-8

Cite this article as:

Yingnan Yang, Yingjie Yang, Chunlin He, Yuezhou Wei, Toyohisa Fujita, Guifang Wang, Shaojian Ma, and Wenchao Yang, Solvent extraction and separation of cobalt from leachate of spent lithium-ion battery cathodes with N263 in nitrite media, Int. J. Miner. Metall. Mater., 30(2023), No. 5, pp. 897-907. https://doi.org/10.1007/s12613-022-2571-8

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研究论文

N263在亚硝酸盐介质下从废锂离子电池正极材料浸出液中萃取分离钴

1)
广西大学资源环境与材料学院，南宁 530004，中国
2)
广西有色金属及特色材料加工重点实验室，南宁 530004，中国
3)
广西壮族自治区高校低碳绿色化工新技术重点实验室，南宁 530004，中国
4)
南华大学核科学与技术学院，衡阳 421000，中国
5)
上海交通大学核科学与工程学院，上海 200240，中国

通讯作者:
何春林 E-mail: helink1900@126.com

文章亮点

(1) N263在NaNO₂体系中选择性配位高效萃取分离Co(II)。

(2) 萃取过程萃取剂和钴形成的络合物为[R₄NCo(NO₂)₃]。

(3) 钴的反萃率超过97.70%显著提高钴的纯度。

(4) 在废锂离子电池材料实际浸出液中Co(II)的萃取效率达到100%。

中文摘要

随着废锂离子电池数量的不断增多，对废锂离子电池材料中钴金属的分离回收成为了近年来的研究热点。为了高效、高选择性地分离回收废锂离子电池正极材料浸出液中的Co(II)，本文基于亚硝酸根的选择性配位和Co(II)形成络阴离子的特点，采用了季铵盐N263作为萃取剂在亚硝酸钠体系中对Co(II)进行选择性分离回收。结果表明，当萃取条件为55vol%磺化煤油，30vol% N263和15vol%异丙醇组成的有机相，水相和有机相的体积比（A/O）为2:1，萃取时间为30 min，温度为25°C，0.1 M HNO₃和1 M亚硝酸钠时，Co(II)的萃取效率最高达到99.16%，而Ni(II)、Mn(II)和Li(I)的萃取效率仅为9.27%–9.80%。采用FT-IR、XPS、UV探究了N263与Co(II)的相互作用机制。研究发现，溶液中${\rm{NO}}_2^- $与Co(II)选择性结合形成阴离子络合物[Co(NO₂)₃]⁻，并通过N263中的Cl⁻进行离子交换，最终溶液中的Co(II)被萃取到有机相中。根据McCabe–Thiele结果显示，当Co(II)浓度为2544 mg/L时，经过三段逆流萃取后Co(II)的萃取效率能够达到99.00%以上。在反萃实验中，当盐酸浓度为1.5 M，水相与有机相的体积比为1:1时，Co(II)的反萃取效率为91.41%。萃取剂N263经过5次萃取和反萃取循环后，Co(II)的萃取效率仍然可以达到93.89%。另外，在废锂离子电池材料实际浸出液中，可实现对Co(II)100%的高效萃取。

关键词:

Research Article

Solvent extraction and separation of cobalt from leachate of spent lithium-ion battery cathodes with N263 in nitrite media

+ Author Affiliations

1)
School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
2)
Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Nanning 530004, China
3)
Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
4)
School of Nuclear Science and Technology, University of South China, Hengyang 421000, China
5)
School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding author:
Chunlin He E-mail: helink1900@126.com
Received: 10 August 2022; Revised: 3 November 2022; Accepted: 4 November 2022; Available online: 8 November 2022

Abstract

Abstract

To effectively separate and recover Co(II) from the leachate of spent lithium-ion battery cathodes, we investigated solvent extraction with quaternary ammonium salt N263 in the sodium nitrite system. N${\rm{O}}_2^- $ combines with Co(II) to form an anion [Co(NO₂)₃]⁻, and it is then extracted by N263. The extraction of Co(II) is related to the concentration of N${\rm{O}}_2^- $. The extraction efficiency of Co(II) reaches the maximum of 99.16%, while the extraction efficiencies of Ni(II), Mn(II), and Li(I) are 9.27%‒9.80% under the following conditions: 30vol% of N263 and 15vol% of iso-propyl alcohol in sulfonated kerosene, the volume ratio of the aqueous-to-organic phase is 2:1, the extraction time is 30 min, and 1 M sodium nitrite in 0.1 M HNO₃. The theoretical stages require for the Co(II) extraction are performed in the McCabe–Thiele diagram, and the extraction efficiency of Co(II) reaches more than 99.00% after three-stage counter-current extraction with Co(II) concentration of 2544 mg/L. When the HCl concentration is 1.5 M, the volume ratio of the aqueous-to-organic phase is 1:1, the back-extraction efficiency of Co(II) achieves 91.41%. After five extraction and back-extraction cycles, the Co(II) extraction efficiency can still reach 93.89%. The Co(II) extraction efficiency in the actual leaching solution reaches 100%.
- cobalt;
- N263;
- sodium nitrite;
- extraction;
- iso-propyl alcohol;
- spent lithium-ion battery

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References(39)

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N263在亚硝酸盐介质下从废锂离子电池正极材料浸出液中萃取分离钴

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中文摘要

Solvent extraction and separation of cobalt from leachate of spent lithium-ion battery cathodes with N263 in nitrite media

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