| abstract |
A preprocessing method of an organic extractant, the preprocessed product and the use thereof in rare earth extraction separation. The preprocessing method comprises that an organic extractant is mixed with a rare earth solution and powder or water slurry of an alkali earth metal compound containing Mg and/or Ca to be preextracted, or mixed with a rare earth carbonate slurry to be preextracted, the rare earth metal ion in water phase extracted into the organic phase, and the alkali earth metal compound or the rare earth carbonate dissolved by the exchanged nascent hydrogen ion; and the acidity balance of extraction system is maintained to obtain a loaded organic extractant with the rare earth metal ion, which is used to separate rare earth elements by non-saponified extraction. |