Enhancing Metal Separations by Liquid–Liquid Extraction Using Polar Solvents

The less polar phase of liquid–liquid extraction systems has been studied extensively for improving metal separations; however, the role of the more polar phase has been overlooked for far too long. Herein, we investigate the extraction of metals from a variety of polar solvents and demonstrate that...

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Bibliographic Details
Published in:Chemistry : a European journal 2019-07, Vol.25 (39), p.9197-9201
Main Authors: Li, Zheng, Zhang, Zidan, Smolders, Simon, Li, Xiaohua, Raiguel, Stijn, Nies, Erik, De Vos, Dirk E., Binnemans, Koen
Format: Article
Language:English
Subjects:
Chemistry
Communication
Communications
metal separations
Metals
Process planning
rare earths
solvent effects
solvent extraction
Solvents
solvometallurgy
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Summary:The less polar phase of liquid–liquid extraction systems has been studied extensively for improving metal separations; however, the role of the more polar phase has been overlooked for far too long. Herein, we investigate the extraction of metals from a variety of polar solvents and demonstrate that, the influence of polar solvents on metal extraction is so significant that extraction of many metals can be largely tuned, and the metal separations can be significantly enhanced by selecting suitable polar solvents. Furthermore, a mechanism on how the polar solvents affect metal extraction is proposed based on comprehensive characterizations. The method of using suitable polar solvents in liquid–liquid extraction paves a new and versatile way to enhance metal separations. Rare‐earth metals: The extraction of metals from a variety of polar solvents was investigated and it has been demonstrated that the influence of polar solvents on metal extraction is so significant that extraction of many metals can be largely tuned, and the metal separations can be significantly enhanced by selecting suitable polar solvents (see figure)
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201901800