| Abstract: |
The application relates to a process for rare earth extraction and thorium removal from monazite or bastnasite bearing ores or ore beneficiation and industrial waste containing a variable amount of rare earth elements as oxides, phosphates, carbonates or sulfates, comprising (i) controlled mixture between sulfuric acid and the material containing rare earth and (ii) water leaching under controlled conditions. |
| Inventor: |
Teixeira, Leandro Augusto Viana (Belo Horizonte, BR); Silva, Ruberlan Gomes (Belo Horizonte, BR) |
| Applicant: |
VALE S.A. (Rio de Janeiro, BR) |
| Face Assignee: |
VALE S.A. (Rio De Janeiro, BR) |
| Filed: |
2015-05-08 |
| Issued: |
2020-03-24 |
| Claims: |
14 |
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US10597754
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1. A process for rare earth extraction from monazite or bastnasite bearing ores or ore beneficiation or industrial waste comprising an amount of rare earth elements as oxides, phosphates, carbonates or sulfates, the method consisting of (i) controlled mixing between sulfuric acid and the monazite or the bastnasite bearing ores or the ore beneficiation or the industrial waste; and (ii) water leaching under controlled conditions,
(4)
(1)
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8. A process for rare earth extraction from monazite or bastnasite bearing ores or ore beneficiation or industrial waste comprising an amount of rare earth elements as oxides, phosphates, carbonates or sulfates, the method consisting of (i) controlled mixing between sulfuric acid and the monazite or the bastnasite bearing ores or the ore beneficiation or the industrial waste; and (ii) water leaching under controlled conditions,
(4)
(1)
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