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:
Nov. 10, 2015
Filed:
Apr. 15, 2010
Mikihito Sugiyama, Akashi, JP;
Yukinori Iguchi, Tamano, JP;
Kiyohito Asaumi, Tamano, JP;
CHLORINE ENGINEERS CORP., LTD., Tokyo, JP;
KANEKA CORPORATION, Osaka, JP;
TOAGOSEI CO., LTD., Tokyo, JP;
Abstract
Disclosed is an electrolysis method, whereby sodium chloride concentration of an aqueous caustic soda solution formed through electrolysis in a two-chamber ion-exchange membrane sodium chloride electrolytic cell, which is equipped with a gas diffusion electrode as a cathode and divided into an anode chamber containing an anode and a cathode gas chamber containing the cathode that are partitioned by an ion-exchange membrane, is lowered. In a two-chamber ion-exchange membrane electrolytic cell () using a gas diffusion electrode (), electrolysis is performed while reducing the pressure difference between the liquid pressure in the anode chamber and the gas pressure in the cathode gas chamber, i.e., the pressure calculated by subtracting [oxygen-containing gas pressure in cathode chamber (measured by manometer ())] or [gas pressure at oxygen-containing gas inlet ()] from [(liquid pressure in anode chamber applied to ion-exchange membrane when anode chamber is filled up with aqueous sodium chloride solution) being equal to (depth of aqueous sodium chloride solution)(density of aqueous sodium chloride solution)/2].