Dissolution and separation of rare earth metals
Patent
·
OSTI ID:1650890
A chemical dissolution method is provided for use in recycling rare earth metal-containing material such as permanent magnet material including end-of-life magnet shapes, magnet scrap and Terfenol-D alloy material by mixing the rare earth metal-containing material and an aqueous solution of a copper (II) salt to dissolve the material in the solution. The dissolved rare earth metal is then precipitated from the aqueous solution as a rare earth metal compound, such as a rare earth metal oxalate, sulfate or phosphate from which rare earth metal oxide can be obtained.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11358
- Assignee:
- Iowa State University Research Foundation, Inc. (Ames, IA)
- Patent Number(s):
- 10,648,063
- Application Number:
- 15/998,079
- OSTI ID:
- 1650890
- Resource Relation:
- Patent File Date: 06/25/2018
- Country of Publication:
- United States
- Language:
- English
Process for recovering highly pure rare earth oxides from a waste rare earth phosphor
|
patent | March 1987 |
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OSTI ID:1650890