EP0010284A3 - Process for the electrolysis of alkali chlorides - Google Patents

Process for the electrolysis of alkali chlorides Download PDF

Info

Publication number
EP0010284A3
EP0010284A3 EP79103962A EP79103962A EP0010284A3 EP 0010284 A3 EP0010284 A3 EP 0010284A3 EP 79103962 A EP79103962 A EP 79103962A EP 79103962 A EP79103962 A EP 79103962A EP 0010284 A3 EP0010284 A3 EP 0010284A3
Authority
EP
European Patent Office
Prior art keywords
electrolysis
membrane
chloride solution
cations
alkali
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.)
Withdrawn
Application number
EP79103962A
Other languages
German (de)
French (fr)
Other versions
EP0010284A2 (en
Inventor
Nikolaj Medic
Theodor Dr. Auel
Dieter Dr. Bergner
Jürgen Dr. Russow
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Publication of EP0010284A2 publication Critical patent/EP0010284A2/en
Publication of EP0010284A3 publication Critical patent/EP0010284A3/en
Withdrawn legal-status Critical Current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

Für die Elektrolyse einer wässrigen Alkalichlorid-Lösung in einer Memebran-Zelle mit perflorierter Kationenaustauscher-Memebran ist es wichtig, daß mög­ lichst wenig Kationen mehrwertiger Metalle, wie Calcium, vorhanden sind. Andernfalls kommt es u.a zu Ablagerungen im Inneren der Membran. Es wurde gefun­ den, daß sich die durch die genannten Kationen hervorgeru­ fenen Störungen wesentlich vermindern lassen, wenn der Alkalichlorid-Lösung eine aliphatische mehrbasische Pho­ sphonsäure oder deren Alkalisalz zugesertzt wird. For the electrolysis of an aqueous alkali chloride solution in a membrane cell with perforated Cation exchanger membrane, it is important that possible as few cations of multivalent metals as calcium, available. Otherwise, it happens to deposits inside the membrane. It was found the fact that they are caused by the cations mentioned open interference can be significantly reduced if the Alkali chloride solution an aliphatic polybasic Pho Sphonic acid or its alkali salt is added.

EP79103962A 1978-10-21 1979-10-15 Process for the electrolysis of alkali chlorides Withdrawn EP0010284A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2845943 1978-10-21
DE19782845943 DE2845943A1 (en) 1978-10-21 1978-10-21 METHOD FOR ALKALICHLORIDE ELECTROLYSIS

Publications (2)

Publication Number Publication Date
EP0010284A2 EP0010284A2 (en) 1980-04-30
EP0010284A3 true EP0010284A3 (en) 1980-05-14

Family

ID=6052801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79103962A Withdrawn EP0010284A3 (en) 1978-10-21 1979-10-15 Process for the electrolysis of alkali chlorides

Country Status (4)

Country Link
US (1) US4236980A (en)
EP (1) EP0010284A3 (en)
JP (1) JPS5558378A (en)
DE (1) DE2845943A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417961A (en) * 1981-03-30 1983-11-29 The Dow Chemical Company Membrane cell brine feed
US4381230A (en) * 1981-06-22 1983-04-26 The Dow Chemical Company Operation and regeneration of permselective ion-exchange membranes in brine electrolysis cells
US4515665A (en) * 1983-10-24 1985-05-07 Olin Corporation Method of stabilizing metal-silica complexes in alkali metal halide brines
US4618403A (en) * 1983-10-24 1986-10-21 Olin Corporation Method of stabilizing metal-silica complexes in alkali metal halide brines
JPS61166991A (en) * 1985-01-18 1986-07-28 Asahi Glass Co Ltd Method for restoring current efficiency
JPS61235587A (en) * 1985-04-12 1986-10-20 Asahi Glass Co Ltd Electrolyzing method
JPS6267185A (en) * 1985-09-20 1987-03-26 Asahi Glass Co Ltd Brine electrolysis method
US4830837A (en) * 1987-08-03 1989-05-16 Olin Corporation Process for removing aluminum from concentrated alkali metal halide brines

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954581A (en) * 1975-07-22 1976-05-04 Ppg Industries, Inc. Method of electrolysis of brine
US3988223A (en) * 1975-10-28 1976-10-26 Basf Wyandotte Corporation Unplugging of electrolysis diaphragms

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6901571A (en) * 1968-02-06 1969-08-08
BE795460A (en) * 1972-02-16 1973-08-16 Diamond Shamrock Corp PERFECTIONS RELATING TO ELECTROLYTIC TANKS

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3954581A (en) * 1975-07-22 1976-05-04 Ppg Industries, Inc. Method of electrolysis of brine
US3988223A (en) * 1975-10-28 1976-10-26 Basf Wyandotte Corporation Unplugging of electrolysis diaphragms

Also Published As

Publication number Publication date
US4236980A (en) 1980-12-02
EP0010284A2 (en) 1980-04-30
DE2845943A1 (en) 1980-04-30
JPS5558378A (en) 1980-05-01

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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PUAL Search report despatched

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AK Designated contracting states

Designated state(s): BE DE FR GB IT NL

AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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18W Application withdrawn

Withdrawal date: 19801021

RIN1 Information on inventor provided before grant (corrected)

Inventor name: AUEL, THEODOR, DR.

Inventor name: BERGNER, DIETER, DR.

Inventor name: MEDIC, NIKOLAJ

Inventor name: RUSSOW, JUERGEN, DR.