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:
Sep. 24, 2019
Filed:
Mar. 28, 2016
Applicant:
Jx Nippon Mining & Metals Corporation, Tokyo, JP;
Inventor:
Toshifumi Kawamura, Hitachi, JP;
Assignee:
JX NIPPON MINING & METALS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25C 3/34 (2006.01); C25C 3/00 (2006.01); C25C 1/00 (2006.01); C25C 7/00 (2006.01); C22B 34/36 (2006.01); C25C 1/06 (2006.01); C25C 7/02 (2006.01); C25C 7/06 (2006.01); C22B 3/04 (2006.01); C22B 3/16 (2006.01); C22B 7/00 (2006.01); C25C 1/08 (2006.01); C25C 1/10 (2006.01);
U.S. Cl.
CPC ...
C22B 34/36 (2013.01); C22B 3/045 (2013.01); C22B 3/16 (2013.01); C22B 7/006 (2013.01); C25C 1/06 (2013.01); C25C 1/08 (2013.01); C25C 1/10 (2013.01); C25C 7/02 (2013.01); C25C 7/06 (2013.01); Y02P 10/234 (2015.11);
Abstract
Provided is a method for efficiently producing tungsten from a raw material mixture comprising at least one valuable containing tungsten. The present invention relates to a method for producing tungsten, comprising the steps of subjecting a raw material mixture comprising at least one valuable containing tungsten to electrolysis using an organic electrolytic solution to dissolve tungsten in the electrolytic solution; and calcining the electrolytic solution containing dissolved tungsten at a temperature of less than 800° C. to obtain tungsten.