Dissolution and separation of rare earth metals
Abstract
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.
- Inventors:
- Issue Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1650890
- Patent Number(s):
- 10648063
- Application Number:
- 15/998,079
- Assignee:
- Iowa State University Research Foundation, Inc. (Ames, IA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- DOE Contract Number:
- AC02-07CH11358
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 06/25/2018
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Mudring, Anja-Verena, Prodius, Denis, and Nlebedim, Cajetan Ikenna. Dissolution and separation of rare earth metals. United States: N. p., 2020.
Web.
Mudring, Anja-Verena, Prodius, Denis, & Nlebedim, Cajetan Ikenna. Dissolution and separation of rare earth metals. United States.
Mudring, Anja-Verena, Prodius, Denis, and Nlebedim, Cajetan Ikenna. Tue .
"Dissolution and separation of rare earth metals". United States. https://www.osti.gov/servlets/purl/1650890.
@article{osti_1650890,
title = {Dissolution and separation of rare earth metals},
author = {Mudring, Anja-Verena and Prodius, Denis and Nlebedim, Cajetan Ikenna},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}
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Works referenced in this record:
Process for recovering highly pure rare earth oxides from a waste rare earth phosphor
patent, March 1987
- Naitou, Masaru; Yoshikawa, Masatake; Narita, Kinichiro
- US Patent Document 4,650,652