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. 28, 2015
Filed:
Mar. 26, 2010
Junichi Okuyama, Yokohama, JP;
Kumiko Yoshihisa, Yokohama, JP;
Yasunori Hamano, Yokohama, JP;
Takahiro Matsuo, Yokohama, JP;
Nobuhiko Kubota, Sagamihara, JP;
Kazuo Uematsu, Yokohama, JP;
Muneo Ayabe, Yokohama, JP;
Junichi Okuyama, Yokohama, JP;
Kumiko Yoshihisa, Yokohama, JP;
Yasunori Hamano, Yokohama, JP;
Takahiro Matsuo, Yokohama, JP;
Nobuhiko Kubota, Sagamihara, JP;
Kazuo Uematsu, Yokohama, JP;
Muneo Ayabe, Yokohama, JP;
IHI CORPORATION, , JP;
Abstract
Disclosed is a method for producing perchlorate, which comprises: an electrolytic step (S) wherein an electrolysis vessel (), in which a positive electrode side (A) on which a positive electrode () is arranged and a negative electrode side (A) on which a negative electrode () is arranged are divided by a cation-exchange membrane (), is used and an aqueous solution of sodium chlorate is electrolytically oxidized on the positive electrode side (A) of the electrolysis vessel (); a neutralization reaction step (S) wherein a substance an aqueous solution of which shows alkalinity is added to the aqueous perchloric acid solution that has been produced by the electrolytic oxidation on the positive electrode side, so that perchlorate is synthesized by a neutralization reaction; and a crystallization process wherein the perchlorate synthesized by the neutralization reaction is obtained as crystals. The crystallization process is composed of an evaporative crystallization step (S), or alternatively composed of three steps, namely an evaporative concentration step (S), a cooling crystallization step (S), and a separation step (S).