Recovery of rare earth elements with ionic liquids

Kaiying Wang; Hertanto Adidharma; MacIej Radosz; Pingyu Wan; Xin Xu; Christopher K. Russell; Hanjing Tian; Maohong Fan; Jiang Yu

doi:10.1039/c7gc02141k

Recovery of rare earth elements with ionic liquids

Kaiying Wang
, Hertanto Adidharma
, MacIej Radosz
, Pingyu Wan
, Xin Xu
, Christopher K. Russell
, Hanjing Tian
, Maohong Fan
, Jiang Yu

Research output: Contribution to journal › Review article › peer-review

179 Scopus citations

Abstract

Rare earth elements (REEs) are in high demand as critical materials in modern green and other advanced technologies. This review focuses on the recovery of REEs from waste with ionic liquids (ILs) as green dilutants and extractants to tackle the REE supply challenge. Extraction mechanisms in different extraction systems, including pure ILs, non-functional ILs with extractants, and functional ILs, are discussed in depth. The IL-based extraction process is different from the traditional molecular solvent-based extraction process. In addition, stripping is crucial to recovering ILs, and supercritical CO₂ (Sc-CO₂) is introduced to recover REE complexes from the IL phase. Also, Sc-CO₂ can accelerate the whole extraction process by enhancing mass transfer. The challenge is to understand the extraction mechanism of the IL/Sc-CO₂ system to advance the green recovery of REEs from waste.

Original language	English
Pages (from-to)	4469-4493
Number of pages	25
Journal	Green Chemistry
Volume	19
Issue number	19
DOIs	https://doi.org/10.1039/c7gc02141k
State	Published - 2017

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title = "Recovery of rare earth elements with ionic liquids",

abstract = "Rare earth elements (REEs) are in high demand as critical materials in modern green and other advanced technologies. This review focuses on the recovery of REEs from waste with ionic liquids (ILs) as green dilutants and extractants to tackle the REE supply challenge. Extraction mechanisms in different extraction systems, including pure ILs, non-functional ILs with extractants, and functional ILs, are discussed in depth. The IL-based extraction process is different from the traditional molecular solvent-based extraction process. In addition, stripping is crucial to recovering ILs, and supercritical CO2 (Sc-CO2) is introduced to recover REE complexes from the IL phase. Also, Sc-CO2 can accelerate the whole extraction process by enhancing mass transfer. The challenge is to understand the extraction mechanism of the IL/Sc-CO2 system to advance the green recovery of REEs from waste.",

author = "Kaiying Wang and Hertanto Adidharma and MacIej Radosz and Pingyu Wan and Xin Xu and Russell, \{Christopher K.\} and Hanjing Tian and Maohong Fan and Jiang Yu",

note = "Publisher Copyright: {\textcopyright} 2017 The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c7gc02141k",

language = "English",

volume = "19",

pages = "4469--4493",

journal = "Green Chemistry",

issn = "1463-9262",

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TY - JOUR

T1 - Recovery of rare earth elements with ionic liquids

AU - Wang, Kaiying

AU - Adidharma, Hertanto

AU - Radosz, MacIej

AU - Wan, Pingyu

AU - Xu, Xin

AU - Russell, Christopher K.

AU - Tian, Hanjing

AU - Fan, Maohong

AU - Yu, Jiang

PY - 2017

Y1 - 2017

N2 - Rare earth elements (REEs) are in high demand as critical materials in modern green and other advanced technologies. This review focuses on the recovery of REEs from waste with ionic liquids (ILs) as green dilutants and extractants to tackle the REE supply challenge. Extraction mechanisms in different extraction systems, including pure ILs, non-functional ILs with extractants, and functional ILs, are discussed in depth. The IL-based extraction process is different from the traditional molecular solvent-based extraction process. In addition, stripping is crucial to recovering ILs, and supercritical CO2 (Sc-CO2) is introduced to recover REE complexes from the IL phase. Also, Sc-CO2 can accelerate the whole extraction process by enhancing mass transfer. The challenge is to understand the extraction mechanism of the IL/Sc-CO2 system to advance the green recovery of REEs from waste.

AB - Rare earth elements (REEs) are in high demand as critical materials in modern green and other advanced technologies. This review focuses on the recovery of REEs from waste with ionic liquids (ILs) as green dilutants and extractants to tackle the REE supply challenge. Extraction mechanisms in different extraction systems, including pure ILs, non-functional ILs with extractants, and functional ILs, are discussed in depth. The IL-based extraction process is different from the traditional molecular solvent-based extraction process. In addition, stripping is crucial to recovering ILs, and supercritical CO2 (Sc-CO2) is introduced to recover REE complexes from the IL phase. Also, Sc-CO2 can accelerate the whole extraction process by enhancing mass transfer. The challenge is to understand the extraction mechanism of the IL/Sc-CO2 system to advance the green recovery of REEs from waste.

UR - https://www.scopus.com/pages/publications/85030704314

U2 - 10.1039/c7gc02141k

DO - 10.1039/c7gc02141k

M3 - Review article

AN - SCOPUS:85030704314

SN - 1463-9262

VL - 19

SP - 4469

EP - 4493

JO - Green Chemistry

JF - Green Chemistry

IS - 19

ER -

Recovery of rare earth elements with ionic liquids

Abstract

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