Acid leaching of rare earth minerals
US10273562B2 · kind B2 · utility
0Cited by
0References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2015 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Nov 6, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides hydrometallurgical processes for the recovery of rare earth values from ore, using simple crushing without beneficiation to produce an enriched and purified mixed rare earth concentrate. Ore is crushed to a relatively coarse particle size, and then treated with relatively small amounts of acid, at a relatively modest elevated temperature, to render the rare earth elements extractable in a subsequent water leach.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.