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:
May. 24, 2016
Filed:
Nov. 01, 2012
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Kazunari Maeba, Ehime, JP;
Yukie Kawakami, Ehime, JP;
Keiji Kudo, Ehime, JP;
Masatoshi Takano, Ehime, JP;
Hitoshi Ishida, Ehime, JP;
Satoshi Asano, Ehime, JP;
Masahiro Tanaka, Ehime, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
The object of the present invention is to provide a method for recovering a rare earth element, which is capable of efficiently recovering a rare earth element with high recovery rate without using any expensive chemicals, solvents or the like. In the present invention, a water-soluble salt other than sulfate ions is allowed to coexist with an aqueous solution that contains a rare earth element, and then an alkali metal sulfate is added to the aqueous solution, thereby producing a precipitate of a double sulfate of the rare earth element.