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JPS558413A - Protecting method of stop electrolytic cell - Google Patents

Protecting method of stop electrolytic cell

Info

Publication number
JPS558413A
JPS558413A JP7871778A JP7871778A JPS558413A JP S558413 A JPS558413 A JP S558413A JP 7871778 A JP7871778 A JP 7871778A JP 7871778 A JP7871778 A JP 7871778A JP S558413 A JPS558413 A JP S558413A
Authority
JP
Japan
Prior art keywords
ion exchange
brine
electrolytic cell
exchange membrane
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7871778A
Other languages
Japanese (ja)
Inventor
Osahiro Nakagawa
Toshimasa Okazaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toagosei Co Ltd
Original Assignee
Toagosei Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toagosei Co Ltd filed Critical Toagosei Co Ltd
Priority to JP7871778A priority Critical patent/JPS558413A/en
Publication of JPS558413A publication Critical patent/JPS558413A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
    • C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

PURPOSE:To prevent corrosion of cathode chamber and prevent performance degradation of ion exchange membranes by lowering the brine concentration in the anode chamber of the electrolytic cell after turning off of power supply and supplying slight current between the cathode and anode at the time of electrolyzing of an aqoues alkali chloride solution by an ion exchange membrane method. CONSTITUTION:When the current supply to the electrolytic cell of the case when the aqueous solution of the chloride of alkaline metals such as NaCl is electrolyzed by an ion exchange membrane, the cathode chamber is corroded by the diffusion of Cl2 dissolved in the brine in the anode chamber. In order to prevent this, the anode chamber brine is extracted and the water flooding and extracting are repeated. At the time of the final water flooding, dilute brine is fed, if necessary, to make concentrations 5 g/lto 0.01g/l. At the same time, the slight current of current density of 5 to 100 mA/dm<2> is flowed. This method enables the prevention of the corrosion of the cathode chamber and performance degradation of the ion exchange membrane to be achieved.
JP7871778A 1978-06-30 1978-06-30 Protecting method of stop electrolytic cell Pending JPS558413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7871778A JPS558413A (en) 1978-06-30 1978-06-30 Protecting method of stop electrolytic cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7871778A JPS558413A (en) 1978-06-30 1978-06-30 Protecting method of stop electrolytic cell

Publications (1)

Publication Number Publication Date
JPS558413A true JPS558413A (en) 1980-01-22

Family

ID=13669617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7871778A Pending JPS558413A (en) 1978-06-30 1978-06-30 Protecting method of stop electrolytic cell

Country Status (1)

Country Link
JP (1) JPS558413A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5112464A (en) * 1990-06-15 1992-05-12 The Dow Chemical Company Apparatus to control reverse current flow in membrane electrolytic cells
JP2012515848A (en) * 2009-01-23 2012-07-12 ダウ グローバル テクノロジーズ エルエルシー Membrane repair
CN103305864A (en) * 2012-03-15 2013-09-18 拜耳知识产权有限责任公司 Method for the electrolysis of alkali chlorides with oxygen consumption electrodes in a micro-gap arrangement
JP2013194321A (en) * 2012-03-15 2013-09-30 Bayer Intellectual Property Gmbh Electrolysis method of alkali metal chloride using oxygen-consuming electrode
EP2639339A3 (en) * 2012-03-15 2015-06-10 Bayer Intellectual Property GmbH Method for the electrolysis of alkali chlorides with oxygen consumption electrodes with openings
EP3670706A1 (en) * 2018-12-18 2020-06-24 Covestro Deutschland AG Method for the membrane electrolysis of alkali chloride solutions with gas diffusion electrode

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5112464A (en) * 1990-06-15 1992-05-12 The Dow Chemical Company Apparatus to control reverse current flow in membrane electrolytic cells
JP2012515848A (en) * 2009-01-23 2012-07-12 ダウ グローバル テクノロジーズ エルエルシー Membrane repair
CN103305864A (en) * 2012-03-15 2013-09-18 拜耳知识产权有限责任公司 Method for the electrolysis of alkali chlorides with oxygen consumption electrodes in a micro-gap arrangement
JP2013194321A (en) * 2012-03-15 2013-09-30 Bayer Intellectual Property Gmbh Electrolysis method of alkali metal chloride using oxygen-consuming electrode
JP2013194322A (en) * 2012-03-15 2013-09-30 Bayer Intellectual Property Gmbh Electrolysis method of alkali metal chloride using oxygen-consuming electrode in micro-gap arrangement
EP2639338A3 (en) * 2012-03-15 2015-06-10 Bayer Intellectual Property GmbH Method for the electrolysis of alkali chlorides with oxygen consumption electrodes in a micro-gap arrangement
EP2639339A3 (en) * 2012-03-15 2015-06-10 Bayer Intellectual Property GmbH Method for the electrolysis of alkali chlorides with oxygen consumption electrodes with openings
EP2639337A3 (en) * 2012-03-15 2015-06-10 Bayer Intellectual Property GmbH Method for the electrolysis of alkali chlorides with oxygen consumption electrodes
CN103305864B (en) * 2012-03-15 2017-08-11 科思创德国股份有限公司 The method for the oxygen-consuming electrode electrolyzing alkali metal chloride arranged with microgap
EP3670706A1 (en) * 2018-12-18 2020-06-24 Covestro Deutschland AG Method for the membrane electrolysis of alkali chloride solutions with gas diffusion electrode
WO2020127021A3 (en) * 2018-12-18 2020-08-20 Covestro Intellectual Property Gmbh & Co. Kg Membrane electrolysis processes for akaline chloride solutions, using a gas-diffusion electrode

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