skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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 Lab., 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

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}
}

Patent:

Save / Share:

Works referenced in this record:

Process for recovering highly pure rare earth oxides from a waste rare earth phosphor
patent, March 1987