CONTINUOUS PROCESS FOR SEPARATION OF EARTHS RARE LIGHTWEIGHT

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continuous process for separation of earths rare light the present invention relates to a process for continuously separating lanthanum (wool) of the (Na + RP) didímio present in a clarified aqueous terrasraras lightweight, by solvent extraction technique, at room temperature and hydrochloric. the process is conducted in three distinct steps, namely : (II) extraction step in the presence of a complexing agent and organic acid extractant organophosphonic; (III) selective washing step with acid solution, and (IV) step re-extraction tank with acid solution. according to the process now proposed is obtained lanthanum and didímio high recovery and elevated purities.