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

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

Abstract

A method is described for 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. 2 figs.

Inventors:
;
Issue Date:
Research Org.:
Iowa State Univ., Ames, IA (United States)
OSTI Identifier:
87775
Patent Number(s):
5,437,709
Application Number:
PAN: 8-280,440
Assignee:
Iowa State Univ. Research Foundation, Inc., Ames, IA (United States)
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 1 Aug 1995
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; SCRAP METALS; MELTING; EXTRACTION; RARE EARTHS; MATERIALS RECOVERY; MAGNESIUM; SOLVENT PROPERTIES; CALCIUM; BARIUM; LIQUID METALS; DISSOLUTION; VACUUM DISTILLATION

Citation Formats

Ellis, T W, and Schmidt, F A. Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction. United States: N. p., 1995. Web.
Ellis, T W, & Schmidt, F A. Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction. United States.
Ellis, T W, and Schmidt, F A. Tue . "Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction". United States.
@article{osti_87775,
title = {Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction},
author = {Ellis, T W and Schmidt, F A},
abstractNote = {A method is described for 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. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {8}
}