JPS54137482A - Regeneration of flouric cation-exchange membrane - Google Patents

Regeneration of flouric cation-exchange membrane

Info

Publication number
JPS54137482A
JPS54137482A JP4486078A JP4486078A JPS54137482A JP S54137482 A JPS54137482 A JP S54137482A JP 4486078 A JP4486078 A JP 4486078A JP 4486078 A JP4486078 A JP 4486078A JP S54137482 A JPS54137482 A JP S54137482A
Authority
JP
Japan
Prior art keywords
membrane
solution
cation
temperature
exchange membrane
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.)
Granted
Application number
JP4486078A
Other languages
Japanese (ja)
Other versions
JPS6038973B2 (en
Inventor
Tetsuro Oota
Koji Miyauchi
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.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry 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 Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP53044860A priority Critical patent/JPS6038973B2/en
Publication of JPS54137482A publication Critical patent/JPS54137482A/en
Publication of JPS6038973B2 publication Critical patent/JPS6038973B2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/162—Use of acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/16—Use of chemical agents
    • B01D2321/164—Use of bases

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

PURPOSE: A carboxylic group containing, fluoric cation-exchange membrane is first dipped into acidic solution then alkaline solution to revover its initial electrolytic property, thereby effecting its repeated usage.
CONSTITUTION: A carboxylic group containing, fluoric cation-exchange membrane or sulfonic acid/carboxylic acid type ion-exchange menbrane which is electrolytically degraded by impurity contaimination of sodium chloride solution is immersed into a acidic solution of 1 N or more at a treating temperature of 45°C or higher. If severe contamination occurred to the membrane, the 1 N or more concentrated acidic solution should contain 1 wt% or more of a water soluble organic solvent, and the dipping provess is made at a temperature over 20°C. The membrane substantially free of impurities by such process is then immersed into aqueous NaOH solution of 0.1N or more at a temperature of 45°C or higher, or preferably aqueous NaOH solution of 0.1N or greater, containing 1 wt% or more of a water soluble organic solvent at a temperature of 20°C or higher, thereby recovering the initial electrolytic property of the membrane.
COPYRIGHT: (C)1979,JPO&Japio
JP53044860A 1978-04-18 1978-04-18 Method for regenerating fluorine-based cation exchange membrane Expired JPS6038973B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53044860A JPS6038973B2 (en) 1978-04-18 1978-04-18 Method for regenerating fluorine-based cation exchange membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53044860A JPS6038973B2 (en) 1978-04-18 1978-04-18 Method for regenerating fluorine-based cation exchange membrane

Publications (2)

Publication Number Publication Date
JPS54137482A true JPS54137482A (en) 1979-10-25
JPS6038973B2 JPS6038973B2 (en) 1985-09-04

Family

ID=12703229

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53044860A Expired JPS6038973B2 (en) 1978-04-18 1978-04-18 Method for regenerating fluorine-based cation exchange membrane

Country Status (1)

Country Link
JP (1) JPS6038973B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104404567A (en) * 2014-12-15 2015-03-11 天津渤天化工有限责任公司 Method for recovering activity of sub-new ion membrane severely polluted by calcium and magnesium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293695A (en) * 1976-02-04 1977-08-06 Kureha Chem Ind Co Ltd Electrolytic production of caustic alkali
JPS52130491A (en) * 1976-04-27 1977-11-01 Toyo Soda Mfg Co Ltd Improvement of current efficiency of cation exchange membranes
JPS52143988A (en) * 1976-05-26 1977-11-30 Toyo Soda Mfg Co Ltd Impro vement of performance of cation exchange membrane
JPS544290A (en) * 1977-06-13 1979-01-12 Toyo Soda Mfg Co Ltd Enhancing method for performance of cation exchange membrane
JPS54112382A (en) * 1978-02-22 1979-09-03 Tokuyama Soda Co Ltd Regenerating method for ion exchange membrane

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5293695A (en) * 1976-02-04 1977-08-06 Kureha Chem Ind Co Ltd Electrolytic production of caustic alkali
JPS52130491A (en) * 1976-04-27 1977-11-01 Toyo Soda Mfg Co Ltd Improvement of current efficiency of cation exchange membranes
JPS52143988A (en) * 1976-05-26 1977-11-30 Toyo Soda Mfg Co Ltd Impro vement of performance of cation exchange membrane
JPS544290A (en) * 1977-06-13 1979-01-12 Toyo Soda Mfg Co Ltd Enhancing method for performance of cation exchange membrane
JPS54112382A (en) * 1978-02-22 1979-09-03 Tokuyama Soda Co Ltd Regenerating method for ion exchange membrane

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104404567A (en) * 2014-12-15 2015-03-11 天津渤天化工有限责任公司 Method for recovering activity of sub-new ion membrane severely polluted by calcium and magnesium

Also Published As

Publication number Publication date
JPS6038973B2 (en) 1985-09-04

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