Invention Grant
- Patent Title: Method of recovering rare earth elements from oxidized scrap of permanent magnet
- Patent Title (中): 从永磁体的氧化废料中回收稀土元素的方法
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Application No.: US14286644Application Date: 2014-05-23
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Publication No.: US09458525B2Publication Date: 2016-10-04
- Inventor: Ho-Sung Yoon , Chul-Joo Kim , Kyeong-Woo Chung
- Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES
- Applicant Address: KR Daejeon
- Assignee: Korea Institute of Geoscience and Mineral Resources
- Current Assignee: Korea Institute of Geoscience and Mineral Resources
- Current Assignee Address: KR Daejeon
- Agency: Lewis Roca Rothberger Christie LLP
- Priority: KR10-2013-0134295 20131106
- Main IPC: C22B59/00
- IPC: C22B59/00 ; C22B3/08 ; C22B3/44 ; C22B7/00

Abstract:
Disclosed is a method of recovering a rare earth element from oxidized scrap of permanent magnet. The method includes leaching an oxidized scrap of a permanent magnet from a sulfuric acid solution, and recovering the rare earth element after precipitating the rare earth element contained in the oxidized scrap of the permanent magnet by adding sodium sulfate into the sulfuric acid solution.
Public/Granted literature
- US20150122084A1 METHOD OF RECOVERING RARE EARTH ELEMENTS FROM OXIDIZED SCRAP OF PERMANENT MAGNET Public/Granted day:2015-05-07
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