Selective Extraction of Rare-Earth Elements from NdFeB Magnets by a Room-Temperature Electrolysis Pretreatment Step
文献类型：期刊论文
| 作者 | Venkatesan, P; Vander Hoogerstraete, T; Binnemans, K; Sun, Z; Sietsma, J; Yang, YX; Venkatesan, Prakash; Vander Hoogerstraete, Tom; Binnemans, Koen; Sun, Zhi |
| 刊名 | ACS SUSTAINABLE CHEMISTRY & ENGINEERING
 |
| 出版日期 | 2018 |
| 卷号 | 6期号:7页码:9375 |
| 关键词 | Nd-Fe-B magnet LOCALIZED CORROSION Rare-earth elements ACID-SOLUTIONS Electrochemical recycling OXIDATION Closed-loop process RECOVERY Metal recovery WASTE IRON BEHAVIOR REMOVAL SCRAP SEPARATION |
| ISSN号 | 2168-0485 |
| DOI | 10.1021/acssuschemeng.8b01707 |
| 文献子类 | Article |
| 英文摘要 | NdFeB magnets are used in wind turbines and hybrid electric vehicles and are instrumental in progression toward a low-carbon economy. Recycling rare-earth elements (REEs) from NdFeB magnet waste is an important step toward building a sustainable REE supply chain. In this study, we describe an electrochemical process to selectively extract REEs from NdFeB magnet waste at room temperature. First, an electrolysis pretreatment step was performed to convert the elements present in the magnet waste into the respective hydroxides. A dual anode system was used where NdFeB magnet waste was taken as an anode along with an inert anode in an electrochemical reactor. The inert anode was used to ensure that iron in the magnet waste was converted into the Fe(III) form in the mixed hydroxides precipitate. Subsequently, the mixed hydroxides were leached with HCl. More than 97% of REEs and cobalt leached into the solution leaving iron in the residue. REEs were then selectively precipitated as rare-earth oxalates using oxalic acid, which in turn regenerated HCl, resulting in a closed-loop process. Calcination of the rare-earth oxalates yielded rare-earth oxides of high purity (99.2%), which can be used directly for producing rare-earth metals. |
| WOS记录号 | WOS:000444924500142 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/26681]  |
| 专题 | 中国科学院过程工程研究所 |
| 推荐引用方式 GB/T 7714 | Venkatesan, P,Vander Hoogerstraete, T,Binnemans, K,et al. Selective Extraction of Rare-Earth Elements from NdFeB Magnets by a Room-Temperature Electrolysis Pretreatment Step[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2018,6(7):9375, 9382. |
| APA | Venkatesan, P.,Vander Hoogerstraete, T.,Binnemans, K.,Sun, Z.,Sietsma, J.,...&Yang, Yongxiang.(2018).Selective Extraction of Rare-Earth Elements from NdFeB Magnets by a Room-Temperature Electrolysis Pretreatment Step.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,6(7),9375. |
| MLA | Venkatesan, P,et al."Selective Extraction of Rare-Earth Elements from NdFeB Magnets by a Room-Temperature Electrolysis Pretreatment Step".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 6.7(2018):9375. |
入库方式： OAI收割
来源：过程工程研究所
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