Abstract
We studied the extraction ability of derivatives of hydrazine and α-branched tertiary carboxylic (versatic) acids of fractions C15–C19 (hydrazides C15–C19) in relation to rare earth metal (REM) ions Y, La, Nd, Ce, Sm, Gd, Ho, Er, and Yb in sulfuric acid media. The hydrazides of C15–C19 α-branched tertiary carboxylic acids have been shown to be excellent extractants that are selective for light and medium lanthanides. The effect of sulfuric acid concentration and presence of impurity ions (Fe3+, Al3+, Ca2+, etc.) on the efficiency of lanthanide extraction was established. The extraction conditions were confirmed by the data on extraction of lanthanide ions from a model leaching solution in a laboratory counter-current cascade of extractors. The investigated reagent is promising for extraction of light REMs because it allows for the group separation of light and heavy REMs, and provides effective separation of light REMs from impurities such as iron, phosphorus, and aluminum.
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Acknowledgements
The authors are grateful to the team in the Laboratory for Development and Promotion of Chemical Technology Processes of the I.V. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials of the Russian Academy of Sciences (Kola Science Center) and personally to the head of the laboratory A.G. Kasikov for assistance with the experiment carried out in the laboratory cascade of extractors. This study was carried out using the equipment of the Center for Collective Use “Research of Materials and Substances.”
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Nikitina, V.A., Radushev, A.V. & Chekanova, L.G. Extraction of Rare Earth Metals from Sulfuric Acid Media by Hydrazides of α- Branched Tertiary Carboxylic Acids. JOM 75, 1559–1568 (2023). https://doi.org/10.1007/s11837-022-05630-4
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DOI: https://doi.org/10.1007/s11837-022-05630-4