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):
- 5437709
- 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}
}