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:
Apr. 19, 2016
Filed:
Jun. 29, 2009
Reiko Fujita, Nerima-Ku, JP;
Koji Mizuguchi, Kawasaki, JP;
Hitoshi Nakamura, Yokohama, JP;
Kouki Fuse, Ota-Ku, JP;
Mitsuru Kawamoto, Tokorozawa, JP;
Masaru Ito, Fujisawa, JP;
Reiko Fujita, Nerima-Ku, JP;
Koji Mizuguchi, Kawasaki, JP;
Hitoshi Nakamura, Yokohama, JP;
Kouki Fuse, Ota-Ku, JP;
Mitsuru Kawamoto, Tokorozawa, JP;
Masaru Ito, Fujisawa, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
An object of the present invention is to provide a method of producing metal zirconium, the method having a fewer steps and a smaller amount of secondary wastes generated, wherein the metal zirconium is obtained from a zirconium compound containing hafnium. A method of producing metal zirconium according to the present invention includes: a separation step of separating a hafnium oxychloride from a first substance containing a zirconium oxychloride and a hafnium oxychloride to obtain a second substance having a higher content of the zirconium oxychloride; a calcination step of calcining the second substance to obtain a third substance containing at least any of a zirconium oxychloride and a zirconium oxide; and a direct reduction step of holding the third substance in a molten salt with the third substance brought into contact with a cathode and applying a voltage between the cathode and an anode to directly reduce the third substance to obtain metal zirconium.