scholarly journals Recovery of Rare Earth Elements (REEs) Using Ionic Solvents

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1202
Author(s):  
Guilhem Arrachart ◽  
Julien Couturier ◽  
Sandrine Dourdain ◽  
Clément Levard ◽  
Stéphane Pellet-Rostaing
Keyword(s):  
Ionic Liquids ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
End Of Life ◽  
Mine Tailings ◽  
Industrial Waste ◽  
Deep Eutectic Solvents ◽  
Secondary Sources ◽  
Advanced Technologies ◽  
Extraction Processes

Rare earth elements (REEs) are becoming more and more significant as they play crucial roles in many advanced technologies. Therefore, the development of optimized processes for their recovery, whether from primary resources or from secondary sources, has become necessary, including recovery from mine tailings, recycling of end-of-life products and urban and industrial waste. Ionic solvents, including ionic liquids (ILs) and deep-eutectic solvents (DESs), have attracted much attention since they represent an alternative to conventional processes for metal recovery. These systems are used as reactive agents in leaching and extraction processes. The most significant studies reported in the last decade regarding the recovery of REEs are presented in this review.

scholarly journals Hydrometallurgical Recovery of Rare Earth Elements from NdFeB Permanent Magnet Scrap: A Review

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 841 ◽  
Author(s):  
Yuanbo Zhang ◽  
Foquan Gu ◽  
Zijian Su ◽  
Shuo Liu ◽  
Corby Anderson ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Permanent Magnet ◽  
Economic Potential ◽  
Selective Leaching ◽  
Processing Efficiency ◽  
Technical Challenge ◽  
Extraction Processes ◽  
Ndfeb Permanent Magnet

NdFeB permanent magnet scrap is regarded as an important secondary resource which contains rare earth elements (REEs) such as Nd, Pr and Dy. Recovering these valuable REEs from the NdFeB permanent magnet scrap not only increases economic potential, but it also helps to reduce problems relating to disposal and the environment. Hydrometallurgical routes are considered to be the primary choice for recovering the REEs because of higher REEs recovery and its application to all types of magnet compositions. In this paper, the authors firstly reviewed the chemical and physical properties of NdFeB permanent magnet scrap, and then carried out an in-depth discussion on a variety of hydrometallurgical processes for recovering REEs from the NdFeB permanent magnet scrap. The methods mainly included selective leaching or complete leaching processes followed by precipitation, solvent extraction or ionic liquids extraction processes. Particular attention is devoted to the specific technical challenge that emerges in the hydrometallurgical recovery of REEs from NdFeB permanent magnet scrap and to the corresponding potential measures for improving REEs recovery by promoting the processing efficiency. This summarized review will be useful for researchers who are developing processes for recovering REEs from NdFeB permanent magnet scrap.

Recovery of rare earth elements with ionic liquids

2017 ◽  
Vol 19 (19) ◽  
pp. 4469-4493 ◽  
Author(s):  
Kaiying Wang ◽  
Hertanto Adidharma ◽  
Maciej Radosz ◽  
Pingyu Wan ◽  
Xin Xu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Rare Earth ◽  
Rare Earth Elements

This review focuses on the recovery of REEs from waste with ionic liquids (ILs) as dilutants and extractants to tackle the REE supply challenge.

scholarly journals Possibilities of recovery and separation of rare earth elements

2019 ◽  
Vol 73 (1) ◽  
pp. 99
Author(s):  
Dominika Fila
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mineral Resources ◽  
Oil Refining ◽  
Secondary Sources ◽  
Energy Technologies ◽  
Technology Products ◽  
Low Emission ◽  
Market Situation ◽  
Critical Mineral

Rare earth metals are a group of elements widely used in high technology products. They are included in the group of critical mineral resources for the EU economy. Rare earth elements are found in computers and mobile phones, as well as in low-emission energy technologies. They are also applied in chemical processes as catalysts in the oil refining. Some of them occur even in considerable quantities in the earth's crust but not very often in the concentrations justifying the profitability of their extraction. Additionally, the constantly growing demand and the current market situation cause that alternative resources of rare earth elements recovery are sought after. Therefore, the recovery and separation methods as well as recovery from the secondary sources are becoming more and more important. The following paper presents the possibilities of recovery and separation of rare earth elements from primary and secondary sources.

Recycling and substitution of light rare earth elements, cerium, lanthanum, neodymium, and praseodymium from end-of-life applications - A review

2019 ◽  
Vol 236 ◽  
pp. 117573 ◽  
Author(s):  
Linda Omodara ◽  
Satu Pitkäaho ◽  
Esa-Matti Turpeinen ◽  
Paula Saavalainen ◽  
Kati Oravisjärvi ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
End Of Life ◽  
Light Rare Earth ◽  
Light Rare Earth Elements

Rare earth recovery from end-of-life motors employing green chemistry design principles

2016 ◽  
Vol 18 (3) ◽  
pp. 753-759 ◽  
Author(s):  
H. M. Dhammika Bandara ◽  
Kathleen D. Field ◽  
Marion H. Emmert
Keyword(s):  
Rare Earth ◽  
Green Chemistry ◽  
Rare Earth Elements ◽  
End Of Life ◽  
Recovery Rate ◽  
Design Principles ◽  
Selective Dissolution ◽  
Selective Precipitation ◽  
Efficient Process ◽  
Efficient Separation

This manuscript describes the development of an efficient process for the recovery of rare earth elements from materials mixtures such as in motors with a recovery rate of >80%. Selective dissolution enables efficient separation of steel and copper and selective precipitation of RE salts is the key for obtaining pure RE products.

Selectivity potential of ionic liquids for metal extraction from slags containing rare earth elements

2017 ◽  
Vol 169 ◽  
pp. 59-67 ◽  
Author(s):  
Ayfer Kilicarslan Sahin ◽  
Daniel Voßenkaul ◽  
Nicolas Stoltz ◽  
Srecko Stopic ◽  
Muhlis Nezihi Saridede ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Metal Extraction
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