CAS OpenIR  > 研究所(批量导入)
An environmentally friendly electro-oxidative approach to recover valuable elements from NdFeB magnet waste
Venkatesan, Prakash1; Sun, Z. H. I.2; Sietsma, Jilt1; Yang, Yongxiang1
2018-01-31
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume191Issue:00Pages:384-391
Abstract

In this manuscript, we demonstrate a room temperature electrochemical process for efficiently recycling NdFeB magnet waste. First, the magnet waste was completely leached with HCl and then, in-situ electrochemical oxidation was performed to selectively oxidize Fe(11) in the leachate to Fe(III). Finally, oxalic acid was added directly to the electro-oxidized leachate which selectively precipitated more than 98% of rare earth elements as rare-earth oxalates. The calcination of rare-earth oxalates produced mixed rare-earth oxides of 99.2% purity and a marketable Fe(III) solution as by-product. The electro-oxidized leachate was also subjected to an alternative neutralization route in which ammonium hydroxide was added to remove iron as ferric hydroxide. The iron free leachate with rare earth elements and cobalt was then subjected to oxalic acid precipitation treatment, which finally produced rare-earth oxides of 99.7% purity. Furthermore, a cobalt-rich solution was obtained in the end and electrowinning studies performed on the solution showed the feasibility of recovering pure metallic cobalt.

SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.seppur.2017.09.053
Indexed BySCI
Language英语
WOS KeywordChloride Solution ; Ferric-chloride ; Acid ; Iron ; Neodymium ; Scrap ; Extraction ; Metals ; Electrodeposition ; Separation
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationEuropean Community's Seventh Framework Programme ([FP7])(607411) ; CAS Pioneer Hundred Talents Program
WOS IDWOS:000417664900044
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23459
Collection研究所(批量导入)
Corresponding AuthorVenkatesan, Prakash; Sun, Z. H. I.
Affiliation1.Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Venkatesan, Prakash,Sun, Z. H. I.,Sietsma, Jilt,et al. An environmentally friendly electro-oxidative approach to recover valuable elements from NdFeB magnet waste[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2018,191(00):384-391.
APA Venkatesan, Prakash,Sun, Z. H. I.,Sietsma, Jilt,&Yang, Yongxiang.(2018).An environmentally friendly electro-oxidative approach to recover valuable elements from NdFeB magnet waste.SEPARATION AND PURIFICATION TECHNOLOGY,191(00),384-391.
MLA Venkatesan, Prakash,et al."An environmentally friendly electro-oxidative approach to recover valuable elements from NdFeB magnet waste".SEPARATION AND PURIFICATION TECHNOLOGY 191.00(2018):384-391.
Files in This Item:
File Name/Size DocType Version Access License
An environmentally f(936KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Venkatesan, Prakash]'s Articles
[Sun, Z. H. I.]'s Articles
[Sietsma, Jilt]'s Articles
Baidu academic
Similar articles in Baidu academic
[Venkatesan, Prakash]'s Articles
[Sun, Z. H. I.]'s Articles
[Sietsma, Jilt]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Venkatesan, Prakash]'s Articles
[Sun, Z. H. I.]'s Articles
[Sietsma, Jilt]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.