Abstract
In this study, Nd, Pr, and Dy were separated and extracted from the rare earth aqueous solution obtained from NdFeB magnet scrap using a PRDC device. To secure the optimal PRDC process conditions, the experiment was conducted by varying the number of rotations of the perforated plate, flow rate of the solution, and concentration of the extractant. As the rotation speed of the perforated plate increased and the flow rate decreased, the extraction rates of Nd, Pr, and Dy increased. However, as the concentration of the extractant increased from 5% to 10%, the extraction rates of Nd and Pr considerably increased, and the separation efficiency of Nd and Dy decreased. In addition, as a result of examining the changes in batch and continuous extraction conditions, single batch extraction showed the highest separation coefficient.
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