The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 2016
Filed:
Apr. 25, 2014
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Yoshitomo Ozaki, Niihama, JP;
Toshihiko Nagakura, Niihama, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
The present invention effectively recover high-grade scandium from nickel oxide ores. The present invention includes a leaching step (S) for charging nickel oxide ores and sulfuric acid into a pressurized vessel, a neutralizing step (S) for adding a neutralizing agent to the leachate to obtain a neutralized precipitate and a neutralized liquid, a sulfidizing step (S) for adding a sulfidizing agent to the neutralized liquid, an ion exchange step (S) for bringing the sulfidized solution into contact with a chelate resin, a solvent extraction step (S) for bringing a Sc eluent into contact with an extracting agent, a Sc precipitation Step (S) for adding a neutralizing agent or oxalic acid to a stripping solution, and a calcination step (S) for drying and calcining a precipitate to obtain scandium oxide.