Refining methods and agents for rare earth production
US9499881B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Dec 4, 2013 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | May 14, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Hydrometallurgical systems, methods, and compositions are described in which organic amine-based lixiviants are utilized in the selective recovery of rare earth elements. The lixiviant can be regenerated in situ, permitting the organic amine to be used in substoichiometric amounts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.