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Title: Recovering heavy rare earth metals from magnet scrap

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.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1374568
Assignee:
Iowa State University Research Foundation, Inc. AMES
Patent Number(s):
9,725,788
Application Number:
14/545,994
Contract Number:
AC02-07CH11358
Resource Relation:
Patent File Date: 2015 Jul 15
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Other works cited in this record:

Process for the preparation of pure alloys based on rare earths and transition metals by metallothermy
patent, August 1988

Scrap treatment method for rare earth transition metal alloys
patent, July 1992

Leaching/flotation scrap treatment method
patent, August 1993

Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction
patent, August 1995

Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet
patent-application, June 2003

Method and apparatus for recovery of rare earth element
patent-application, February 2011

Process for extraction of rare earth elements
patent-application, October 2013

Method for producing metal by molten salt electrolysis and apparatus used for the production method
patent-application, October 2014

Method for Separating and Recovering Rare-Earth Elements
patent-application, December 2014

Processes for recovering rare earth elements and rare metals
patent-application, April 2015

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