Molecular Recognition Technology: a Green Chemistry Process for Separation of Individual Rare Earth Metals
نویسندگان
چکیده
Separation methods for rare earth elements (REE) are predominantly based on solvent extraction procedures. These methods are low in metal selectivity and generate large amounts of waste resulting in high capex and opex costs. Molecular Recognition Technology (MRT) is a much simpler green chemistry process that uses no organic solvents and carries out separations with highly metal-selective SuperLig products. Minimal waste is generated. The MRT process has been used to successfully separate all sixteen REE (excluding Pm) (1) from a pregnant leach solution derived from the Bokan-Dotson Ridge (Alaska) rare earth metal deposit and (2) individually, from each other. Both separations are made at the >99% level. This paper discusses the MRT-based REE separation results in comparison with traditional separations technology.
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