Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction
Abstract
Method of treating rare earth metal-bearing scrap, waste or other material (e.g. Nd--Fe--B or Dy--Tb--Fe scrap) to recover the rare earth metal comprising melting the rare earth metal-bearing material, melting a Group IIA metal extractant, such as Mg, Ca, or Ba, in which the rare earth is soluble in the molten state, and contacting the melted material and melted extractant at a temperature and for a time effective to extract the rare earth from the melted material into the melted extractant. The rare earth metal is separated from the extractant metal by vacuum sublimation or distillation.
- Inventors:
-
- Ames, IA
- Issue Date:
- Research Org.:
- Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
- OSTI Identifier:
- 870007
- Patent Number(s):
- 5437709
- Application Number:
- 08/280,440
- 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:
- W-7405-ENG-82
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- recycling; rare; earth; metals; earth-transition; metal; alloy; scrap; liquid; extraction; method; treating; metal-bearing; waste; material; nd-fe-b; dy-tb-fe; recover; comprising; melting; iia; extractant; mg; soluble; molten; contacting; melted; temperature; time; effective; extract; separated; vacuum; sublimation; distillation; melted material; liquid metal; transition metal; rare earth; metal alloy; earth metal; earth metals; time effective; earth-transition metal; rare earth-transition; extraction method; treating rare; metal extraction; /75/
Citation Formats
Ellis, Timothy W, and Schmidt, Frederick A. Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction. United States: N. p., 1995.
Web.
Ellis, Timothy W, & Schmidt, Frederick A. Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction. United States.
Ellis, Timothy W, and Schmidt, Frederick A. Tue .
"Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction". United States. https://www.osti.gov/servlets/purl/870007.
@article{osti_870007,
title = {Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction},
author = {Ellis, Timothy W and Schmidt, Frederick A},
abstractNote = {Method of treating rare earth metal-bearing scrap, waste or other material (e.g. Nd--Fe--B or Dy--Tb--Fe scrap) to recover the rare earth metal comprising melting the rare earth metal-bearing material, melting a Group IIA metal extractant, such as Mg, Ca, or Ba, in which the rare earth is soluble in the molten state, and contacting the melted material and melted extractant at a temperature and for a time effective to extract the rare earth from the melted material into the melted extractant. The rare earth metal is separated from the extractant metal by vacuum sublimation or distillation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {8}
}
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