An environmentally friendly electro-oxidative approach to recover valuable elements from NdFeB magnet waste
文献类型:期刊论文
作者 | Venkatesan, Prakash1; Sun, Z. H. I.2; Sietsma, Jilt1; Yang, Yongxiang1 |
刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
![]() |
出版日期 | 2018-01-31 |
卷号 | 191期号:00页码:384-391 |
ISSN号 | 1383-5866 |
DOI | 10.1016/j.seppur.2017.09.053 |
文献子类 | Article |
英文摘要 | 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. |
WOS关键词 | Chloride Solution ; Ferric-chloride ; Acid ; Iron ; Neodymium ; Scrap ; Extraction ; Metals ; Electrodeposition ; Separation |
WOS研究方向 | Engineering |
语种 | 英语 |
WOS记录号 | WOS:000417664900044 |
资助机构 | European Community's Seventh Framework Programme ([FP7])(607411) ; CAS Pioneer Hundred Talents Program |
源URL | [http://ir.ipe.ac.cn/handle/122111/23459] ![]() |
专题 | 过程工程研究所_研究所(批量导入) |
通讯作者 | Venkatesan, Prakash; Sun, Z. H. I. |
作者单位 | 1.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 |
推荐引用方式 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. |
入库方式: OAI收割
来源:过程工程研究所
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。