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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.:

US 9315908 B1

PDFFull Text
Date of Patent:
Apr. 19, 2016

Filed:

Oct. 01, 2010

Electrolytic cell for producing chlorine—sodium hydroxide and method of producing chlorine—sodium hydroxide

Applicants:

Tomonori Idutsu, Kakogawa, JP;

Koji Saiki, Toyonaka, JP;

Yukinori Iguchi, Okayama, JP;

Kiyohito Asaumi, Okayama, JP;

Inventors:

Tomonori Idutsu, Kakogawa, JP;

Koji Saiki, Toyonaka, JP;

Yukinori Iguchi, Okayama, JP;

Kiyohito Asaumi, Okayama, JP;

Assignees:

CHLORINE ENGINEERS CORP., , JP;

KANEKA CORPORATION, , JP;

TOAGOSEI CO., LTD., , JP;

Attorney:

Ostrolenk Faber LLP

Primary Examiner:

Keith Hendricks

Assistant Examiner:

Salil Jain

Int. Cl.
CPC ...
C25B 1/16 (2006.01); C25B 1/26 (2006.01); C25B 1/46 (2006.01); C25B 9/08 (2006.01); C25B 13/08 (2006.01); C25B 1/34 (2006.01); C25B 13/04 (2006.01);
U.S. Cl.
CPC ...
C25B 1/16 (2013.01); C25B 1/26 (2013.01); C25B 1/34 (2013.01); C25B 1/46 (2013.01); C25B 9/08 (2013.01); C25B 13/04 (2013.01); C25B 13/08 (2013.01);
Abstract

There is provided a method of production of chlorine.sodium hydroxide capable of being operated stably and economically by preventing calcium from being deposited in an ion exchange membrane. The liquid retention layerhaving a liquid retention amount per unit volume of the liquid retention layer of 0.10 g-HO/cmor more and 0.80 g-HO/cmor less is put between the ion exchange membraneand the gas diffusion electrode. Calcium ions transferred through the ion exchange membraneeasily diffuse, thereby making it possible to suppress increase in an electrolytic voltage and drop in current efficiency generated by deposition of the calcium ions inside the ion exchange membrane

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