| 发明名称 |
SYSTEM AND PROCESS FOR SELECTIVE RARE EARTH EXTRACTION WITH SULPHUR RECOVERY |
| 摘要 |
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. |
| 申请公布号 |
US2015329940(A1) |
申请公布日期 |
2015.11.19 |
| 申请号 |
US201514708131 |
申请日期 |
2015.05.08 |
| 申请人 |
VALE S.A. |
发明人 |
TEIXEIRA Leandro Augusto Viana;Silva Ruberlan Gomes |
| 分类号 |
C22B59/00;C22B7/00;C22B3/08 |
主分类号 |
C22B59/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. 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. |
| 地址 |
Rio de Janeiro BR |
