JPS54110981A - Electrolysis - Google Patents

Electrolysis

Info

Publication number
JPS54110981A
JPS54110981A JP1758478A JP1758478A JPS54110981A JP S54110981 A JPS54110981 A JP S54110981A JP 1758478 A JP1758478 A JP 1758478A JP 1758478 A JP1758478 A JP 1758478A JP S54110981 A JPS54110981 A JP S54110981A
Authority
JP
Japan
Prior art keywords
water
naoh
condensed water
adjust
supplied
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
JP1758478A
Other languages
Japanese (ja)
Inventor
Seiichi Shiragami
Toshio Oku
Yosuke Kakihara
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.)
Tokuyama Corp
Original Assignee
Tokuyama Corp
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 Tokuyama Corp filed Critical Tokuyama Corp
Priority to JP1758478A priority Critical patent/JPS54110981A/en
Publication of JPS54110981A publication Critical patent/JPS54110981A/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:Efficiency of saline water electrolysis by ion-exchange method is enhanced, wherein low concentration NaOH supplied from the electrolytic bath is concentrated, providing condensed water which is partly utilized to produce hydrochloric acid used for pH adjustment in the anode chamber whereby an adequate amount of the rest of the water is supplied to the cathode chamber to adjust catholyte concentration. CONSTITUTION:Saline water is electrolyzed in the ion-exchange membrane electrolytic bath 1. The produced Cl2 and H2 are both partially passed to the HCl sybthetic tower 2 to produce HCl, which is introduced into the absorption column 3. Meanwhile, aqueous NaOH solution of relatively low concentration such as 18 to 25% is fed from the electrolytic bath 1 to the evaporator 4 such as counter-current type quadruple effective evaporator, where the NaOH solution is concentrated to about 48% solution. Evaporated water is condensed and the condensed water is fed to the absorption column 3 to absorb HCl. The produced hydrochloric acid is then partially utilized to adjust pH of the anode chamber. An adequate amount of the condensed water is supplied to the cathode chamber to adjust the concentration of NaOH to 18 to 25%. Further, the NaOH contained in the condensed water is recovered.
JP1758478A 1978-02-20 1978-02-20 Electrolysis Pending JPS54110981A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1758478A JPS54110981A (en) 1978-02-20 1978-02-20 Electrolysis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1758478A JPS54110981A (en) 1978-02-20 1978-02-20 Electrolysis

Publications (1)

Publication Number Publication Date
JPS54110981A true JPS54110981A (en) 1979-08-30

Family

ID=11947946

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1758478A Pending JPS54110981A (en) 1978-02-20 1978-02-20 Electrolysis

Country Status (1)

Country Link
JP (1) JPS54110981A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8317994B2 (en) 2008-08-07 2012-11-27 Westlake Vinyl Corporation Method of concentrating an aqueous caustic alkali using a catholyte heat recovery evaporator
CN103046070A (en) * 2012-12-13 2013-04-17 苏州新区化工节能设备厂 Ion membrane electrolytic tank

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8317994B2 (en) 2008-08-07 2012-11-27 Westlake Vinyl Corporation Method of concentrating an aqueous caustic alkali using a catholyte heat recovery evaporator
CN103046070A (en) * 2012-12-13 2013-04-17 苏州新区化工节能设备厂 Ion membrane electrolytic tank

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