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Title: Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction

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)
Issue Date:
OSTI Identifier:
870007
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA) AMES
Patent Number(s):
US 5437709
Application Number:
08/280,440
Contract Number:
W-7405-ENG-82
Research Org:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
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/

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