Invention Grant
- Patent Title: Method for recovering scandium
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Application No.: US16077821Application Date: 2017-02-21
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Publication No.: US11214849B2Publication Date: 2022-01-04
- Inventor: Hidemasa Nagai , Keiji Kudo , Itsumi Matsuoka , Yoshitomo Ozaki , Hirofumi Shoji , Shin-ya Matsumoto , Tatsuya Higaki
- Applicant: SUMITOMO METAL MINING CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: SUMITOMO METAL MINING CO., LTD.
- Current Assignee: SUMITOMO METAL MINING CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Locke Lord LLP
- Agent James E. Armstrong, IV; Nicholas J. DiCeglie, Jr.
- Priority: JPJP2016-032039 20160223
- International Application: PCT/JP2017/006327 WO 20170221
- International Announcement: WO2017/146034 WO 20170831
- Main IPC: C22B59/00
- IPC: C22B59/00 ; C01F17/212 ; C01F17/17 ; C01F17/13 ; C22B3/26 ; C01G53/11 ; C22B3/08 ; C22B3/42

Abstract:
A method for recovering scandium, by which scandium is able to be recovered from nickel oxide ore. The present invention comprises: a leaching step S1 for obtaining a leachate by leaching a nickel oxide ore containing scandium with use of sulfuric acid; a neutralization step by adding a neutralizing agent thereto; a sulfurization step by adding a sulfurizing agent to the post-neutralization solution; an ion exchange step by bringing the post-sulfurization solution into contact with a chelating resin; a dissolution step by obtaining a precipitate of scandium hydroxide by adding an alkali into the scandium eluent, and subsequently adding an acid solution to the scandium hydroxide; a solvent extraction step by bringing the scandium acid dissolution liquid into contact with a neutral extractant; and a scandium recovery step by adding oxalic acid to the extraction residue and subsequently roasting the salt of scandium oxalate.
Public/Granted literature
- US20210254193A1 METHOD FOR RECOVERING SCANDIUM Public/Granted day:2021-08-19
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