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Title:
BRINE ELECTROLYSIS DEVICE FOR PRODUCING CAUSTIC SODA
Document Type and Number:
WIPO Patent Application WO/2018/154643
Kind Code:
A1
Abstract:
Provided is a brine electrolysis device for producing caustic soda capable of effectively preventing precipitation of carbonates due to the intrusion of carbon dioxide into the electrolyte, deterioration of electrolyte, and increase of reaction resistance in a reaction layer. This brine electrolysis device is provided with: an anode chamber that has an anode and is supplied with an aqueous sodium chloride solution to generate chlorine; a cathode chamber that has a gas diffusion electrode as a cathode, and is supplied with oxygen and water to generate an aqueous sodium hydroxide solution; an ion exchange membrane that divides the anode chamber from the cathode chamber, and allows selective permeation of sodium ions; a cathode gas chamber that is disposed on one surface side of the gas diffusion electrode in the cathode chamber, and is supplied with oxygen gas and water vapor; and a layered double hydroxide (LDH) separator that is disposed on the other surface side of the gas diffusion electrode, and inhibits intrusion of carbon dioxide from the cathode gas chamber into the aqueous sodium hydroxide solution.

Inventors:
HATTORI TATSUYA (JP)
IWAI MAKOTO (JP)
Application Number:
PCT/JP2017/006526
Publication Date:
August 30, 2018
Filing Date:
February 22, 2017
Export Citation:
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Assignee:
NGK INSULATORS LTD (JP)
International Classes:
C25B9/00
Domestic Patent References:
WO2016076047A12016-05-19
Foreign References:
JPH06248483A1994-09-06
JP2003041388A2003-02-13
JP2017010914A2017-01-12
JPH0896812A1996-04-12
JP2000017471A2000-01-18
JP2017024949A2017-02-02
Attorney, Agent or Firm:
TAKAMURA Masaharu et al. (JP)
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