Abstract
The extraction and separation of heavy rare earths from ion-adsorbed rare earth deposit using CYANEX® 572 were first investigated. The comparison of selectivities for heavy rare earth ions reveals that CYANEX® 572 is more effective than common industrial extractant P507, especially for the enrichments of Tm, Yb, and Lu. Considering the lower acid requirement and higher stripping efficiency of CYANEX® 572, the novel extractant CYANEX® 572 has revealed industrial application values for the separation of heavy rare earths from ion-adsorbed deposit.
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