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Functionalized Adsorbents for the Recovery of Rare Earth Elements from Aqueous Media

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
The disclosure relates to the design and synthesis of selected ligands, dendrimers, polymers and other solid phase substrates for selective chelation of rare earth elements (i.e. lanthanides), and use of those selective ligands for synthesis of resins, polymers and other types of solid supports for separation and recovery of lanthanides from aqueous media. Recovery of critical elements from aqueous media occurs in a simple two-step process: pre-concentration of REE on the adsorbent and recovery by acid elution. The present invention can be used for design of selective ligands immobilized on solid substrates for extraction of various constituents, such as lanthanides, actinides, radionuclides, trace metals, etc., from aqueous media.
Karamalidis, Athanasios (Pittsburgh, PA), Washburn, Newell R. (Pittsburgh, PA), Noack, Clinton W. (Pittsburgh, PA), Perkins, Kedar (Pittsburgh, PA), Dzombak, David A. (Pittsburgh, PA)
CARNEGIE MELLON UNIVERSITY, a Pennsylvania Non-Profit Corporation (Pittsburgh PA)
15/ 293,142
October 13, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH [0002] This invention was made with government support under Grant No. DE-EE0006749 awarded by the Department of Energy. The government has certain rights in the invention.