SEPARATION OF RARE-EARTH IONS BY NON-AQUEOUS SOLVENT EXTRACTION

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The present invention relates to a new solvent extraction process for the extraction of rare earth elements and the separation of a mixture of rare earth elements into the individual rare earth elements. Said process comprises the extraction of at least one rare earth element from an organic phase A into another immiscible organic phase B. The invention further relates to a non-aqueous solvent extraction process wherein at least one rare earth element is extracted from an organic phase A that comprises chloride ions into another immiscible organic phase B, wherein said organic phase B can be a non-polar organic solvent that comprises an extractant such as trialkylphosphine oxide (for instance Cyanex 923).