Method for recovering reusable elements from rare earth-nickel alloy
US5980841A · kind A · utility
11Cited by
0References
14Claims
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Inventor
Key dates
| Filing date | Feb 11, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Feb 11, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/84
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for recovering reusable elements including rare earth elements from a rare earth-nickel alloy is disclosed, including the steps of: PA1 preparing a slurry of the rare earth-nickel alloy, PA1 adding a diluted nitric acid solution to the slurry over a period of time under stirring at a temperature not higher than 50.degree. C. while maintaining pH of a resulting mixture at 5 or higher to dissolve soluble metals including rare earth metals, and PA1 separating an undissolved residue containing nickel from a rare earth-containing nitrate solution by filtration.
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