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http://dx.doi.org/10.7844/kirr.2017.26.4.26

Solvent Extraction of Heavy Rare Earth Elements Using PC88A from Synthesis Solution of Low Concentration Rare Earth Solution  

Ahn, Nak-Kyoon (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Im, Byoungyong (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Lee, Jieun (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Park, Jae Ryang (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Lee, Chan-Gi (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Park, Kyung-Soo (Advanced Materials & Processing Center, Institute for Advanced Engineering (IAE))
Publication Information
Resources Recycling / v.26, no.4, 2017 , pp. 26-33 More about this Journal
Abstract
The behavior on the solvent extraction of heavy rare earths (HRE) by using PC88A was confirmed to demonstrate the possibility of recovery on the HRE from industrial wastewater, which consist of low concentration rare earth. We verified the extraction behavior of the HRE through a change of equilibrium pH, extractant concentration and A/O ratio, and also confirmed the stripping behavior depending on the type of mineral acids. At equilibrium pH 1.0, extraction of rare earth (RE) was completed from 95% to 100%. In all extraction conditions, it tend to be extracted in order of high atomic number. When A/O ratio was 10/1, Yb and Tm were concentrated at the maximum and increased 6-fold and 3-fold compared to initial concentration, respectively. To confirm the stripping behavior of the RE, three mineral acids were applied to the organic phase and consequently rate of stripping was increased in order of $HNO_3$, $H_2SO_4$ and HCl.
Keywords
Heavy rare earth; Solvent extraction; PC88A; Separation; Concentrate;
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Times Cited By KSCI : 6  (Citation Analysis)
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