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Title: 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:
 [1];  [1]
  1. (Ames, IA)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
OSTI Identifier:
870007
Patent Number(s):
US 5437709
Application Number:
08/280,440
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA) AMES
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}
}

Patent:

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