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Recovering heavy rare earth metals from magnet scrap

United States Patent

9,725,788
August 8, 2017
View the Complete Patent at the US Patent & Trademark Office
A method of treating rare earth metal-bearing permanent magnet scrap, waste or other material in a manner to recover the heavy rare earth metal content separately from the light rare earth metal content. The heavy rare earth metal content can be recovered either as a heavy rare earth metal-enriched iron based alloy or as a heavy rare earth metal based alloy.
Ott; Ryan T. (Ames, IA), McCallum; Ralph W. (Ames, IA), Jones; Lawrence L. (Des Moines, IA)
Iowa State University Research Foundation, Inc. (Ames, IA)
14/ 545,994
20160362766
July 15, 2015
CONTRACTUAL ORIGIN OF THE INVENTION This invention was made with government support under Grant No. DE-AC02-07CH11358 awarded by the U.S. Department of Energy. The government has certain rights in the invention.