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Method For Recovering Scandium
Abstract: (Problem) The purpose of the present invention is to provide a method for recovering rare-earth elements comprising, while recovering scandium from iron and steel slag, crudely separating scandium and a rare-earth element other than scandium. (Solution) The method is characterized by multiple leaching at different pH ranges of rare-earth elements including scandium from iron and steel slag. The present invention is characterized by further combining a leachate obtained by the method with an element separation step to allow highly efficient recovery of scandium.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
05 February 2025
Publication Number
12/2025
Publication Type
INA
Invention Field
METALLURGY
Status
Email
Parent Application
Applicants
NIPPON STEEL CORPORATION
6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo
1008071
Inventors
1. HIRATA, Junichi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo
1008071
2. ISHIKAWA, Kyohei
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo
1008071
3. AIMOTO, Michihiro
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo
1008071
4. SHIMADA, Yusuke
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo
1008071
5. HOSHINO, Manabu
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo
1008071
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 202517009490-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [05-02-2025(online)].pdf | 2025-02-05 |
| 2 | 202517009490-STATEMENT OF UNDERTAKING (FORM 3) [05-02-2025(online)].pdf | 2025-02-05 |
| 3 | 202517009490-REQUEST FOR EXAMINATION (FORM-18) [05-02-2025(online)].pdf | 2025-02-05 |
| 4 | 202517009490-PROOF OF RIGHT [05-02-2025(online)].pdf | 2025-02-05 |
| 5 | 202517009490-PRIORITY DOCUMENTS [05-02-2025(online)].pdf | 2025-02-05 |
| 6 | 202517009490-POWER OF AUTHORITY [05-02-2025(online)].pdf | 2025-02-05 |
| 7 | 202517009490-FORM 18 [05-02-2025(online)].pdf | 2025-02-05 |
| 8 | 202517009490-FORM 1 [05-02-2025(online)].pdf | 2025-02-05 |
| 9 | 202517009490-DRAWINGS [05-02-2025(online)].pdf | 2025-02-05 |
| 10 | 202517009490-DECLARATION OF INVENTORSHIP (FORM 5) [05-02-2025(online)].pdf | 2025-02-05 |
| 11 | 202517009490-COMPLETE SPECIFICATION [05-02-2025(online)].pdf | 2025-02-05 |
| 12 | 202517009490-FORM 3 [27-06-2025(online)].pdf | 2025-06-27 |