Enhanced separation of rare earth metals
US11958754B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jun 14, 2019 |
| Grant date | Apr 16, 2024 |
| Priority date | — |
| Expiry date | Jul 19, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for extracting a rare earth metal from a mixture of one or more rare earth metals, said method comprising contacting an acidic solution of the rare earth metal with a composition which comprises an ionic liquid to form an aqueous phase and a non-aqueous phase into which the rare earth metal has been selectively extracted, wherein the ionic liquid has the formula [Ca++][X′], where [X′] represents a phosphinate anion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.