Organic acid solution having at least one ionic salt and at least one organic acid which is used for rare earth extraction
US11814700B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Sep 29, 2022 |
| Grant date | Nov 14, 2023 |
| Priority date | — |
| Expiry date | Sep 29, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
One or more embodiments relates to a process for extracting Rare Earth Elements (REEs) from REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal. In at least one embodiment the process includes contacting the REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal with an Organic Acid Solution (OAS) comprising at least one organic acid and at least one ionic salt at a predetermined ambient temperature and predetermined pH; and separating the REE from the REE-bearing underclays, claystones, shales, coal-mining waste, and waste coal, forming REE+Yttrium (REY) concentrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.