EP0170092B1 - Elektrolysezelle mit horizontal angeordneten Elektroden - Google Patents

Elektrolysezelle mit horizontal angeordneten Elektroden Download PDF

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Publication number
EP0170092B1
EP0170092B1 EP85108265A EP85108265A EP0170092B1 EP 0170092 B1 EP0170092 B1 EP 0170092B1 EP 85108265 A EP85108265 A EP 85108265A EP 85108265 A EP85108265 A EP 85108265A EP 0170092 B1 EP0170092 B1 EP 0170092B1
Authority
EP
European Patent Office
Prior art keywords
cell
membrane
gas
trough
diffusion cathode
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.)
Expired
Application number
EP85108265A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0170092A1 (de
Inventor
Rudolf Dr. Staab
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
Priority to AT85108265T priority Critical patent/ATE36875T1/de
Publication of EP0170092A1 publication Critical patent/EP0170092A1/de
Application granted granted Critical
Publication of EP0170092B1 publication Critical patent/EP0170092B1/de
Expired legal-status Critical Current

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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
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms

Definitions

  • the invention relates to a trough-like electrolysis cell with horizontally arranged electrodes for producing chlorine from alkali chloride solution according to the membrane method, in which the anodes are arranged on the cell cover in a height-adjustable manner.
  • the membrane cell consists of two electrolysis chambers, each with a gas-generating electrode, which are separated by a cation-selective membrane. If such a membrane cell were arranged horizontally, a gas cushion, depending on the arrangement of chlorine or hydrogen, would form under the membrane, and the electrolyte resistance would nullify the cell voltage advantage.
  • EP-A-104137 shows the conversion of mercury cells into membrane cells, with hydrogen being developed on the cathode and being removed from the cathode compartment with the resulting lye.
  • the task was therefore to create a membrane cell with horizontally arranged electrodes from the mercury cell, in which gas cushions do not arise which could influence the electrical resistance.
  • the present invention achieves the object in that a gas diffusion cathode rests on a grate with support feet for support on the cell bottom and a spacer is arranged between the membrane and the gas diffusion cathode.
  • the membrane can be clamped between the cell cover and the cell tub.
  • the cell cover can have devices for supplying and discharging brine and chlorine and the cell trough can have devices for supplying oxygen-containing gas.
  • the advantage of the invention is essentially to be seen in the fact that it is possible to inexpensively convert mercury cells into membrane cells with the advantages mentioned above.
  • the electrolytic cell consists of the cell tub 1, which is connected to the negative pole of the power supply.
  • This trough is provided with support feet 2 which stand on the cell floor and which carry the gas diffusion cathode 3. They also serve to supply current to the gas diffusion cathode 3.
  • the support feet 2 consist of a metallic material, preferably of the same material as the cell trough, in order to achieve the best possible connection, e.g. B. to ensure by welding the support feet to the cell pan.
  • the support feet 2 are provided with a grate 4 on which the gas diffusion cathode 3 rests.
  • the gas diffusion cathode 3 itself is a wire mesh or expanded metal coated with an electrochemically active catalyst, and is hydrophobized by means of a plastic, preferably polytetrafluoroethylene, in order to prevent the sodium hydroxide solution from seeping through.
  • a gas space I is created, via which the gas diffusion cathode 3 with oxygen or an oxygen-containing gas, for. B. air is supplied.
  • the gas space is provided with devices for introducing oxygen or air (not shown in the figure) and optionally with devices for disposing of excess oxygen or air depleted in oxygen (not shown in the figure).
  • the cation exchange membrane 6 is clamped between the cell cover 5 and the cell tub 1. It separates the cathode compartment II, in which the sodium hydroxide solution circulates, from the anode compartment 111, in which the conversion of the chloride ions to elemental chlorine takes place at a titanium or graphite anode 7.
  • a spacer 8 in the cathode compartment II This can be designed in the form of a mesh made of a lye-resistant plastic or metal.
  • the inlet and outlet (not shown) present in the cell tub 1 can be used for the catholyte circuit.
  • the cell cover 5 is provided with devices (not shown) via which the anode compartment 111 can be supplied with brine and the depleted brine and the chlorine formed can be disposed of.
  • Graphite anodes or activated titanium anodes are used as anodes to keep the chlorine overvoltage low.
  • the anodes 7 are attached to the cell cover in a known manner in a height-adjustable manner. It is particularly advantageous if the membrane rests on the titanium anodes, which is done with the adjustment device for the electrode spacing can be reached.
  • Another advantage of using a gas diffusion cathode is an additional cell voltage saving compared to membrane cells with a hydrogen-producing cathode, since the potential for oxygen reduction is approximately 1.2 volts more positive than the potential for hydrogen generation.

Landscapes

  • Chemical & Material Sciences (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)
  • Electrolytic Production Of Metals (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Electroluminescent Light Sources (AREA)
  • External Artificial Organs (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
EP85108265A 1984-07-13 1985-07-04 Elektrolysezelle mit horizontal angeordneten Elektroden Expired EP0170092B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85108265T ATE36875T1 (de) 1984-07-13 1985-07-04 Elektrolysezelle mit horizontal angeordneten elektroden.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843425862 DE3425862A1 (de) 1984-07-13 1984-07-13 Elektrolysezelle mit horizontal angeordneten elektroden
DE3425862 1984-07-13

Publications (2)

Publication Number Publication Date
EP0170092A1 EP0170092A1 (de) 1986-02-05
EP0170092B1 true EP0170092B1 (de) 1988-08-31

Family

ID=6240568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108265A Expired EP0170092B1 (de) 1984-07-13 1985-07-04 Elektrolysezelle mit horizontal angeordneten Elektroden

Country Status (11)

Country Link
US (1) US4615783A (enrdf_load_stackoverflow)
EP (1) EP0170092B1 (enrdf_load_stackoverflow)
AT (1) ATE36875T1 (enrdf_load_stackoverflow)
AU (1) AU573356B2 (enrdf_load_stackoverflow)
CA (1) CA1254532A (enrdf_load_stackoverflow)
DE (2) DE3425862A1 (enrdf_load_stackoverflow)
ES (1) ES288013Y (enrdf_load_stackoverflow)
FI (1) FI76837C (enrdf_load_stackoverflow)
IN (1) IN164954B (enrdf_load_stackoverflow)
NO (1) NO163786C (enrdf_load_stackoverflow)
ZA (1) ZA855260B (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4732660A (en) * 1985-09-09 1988-03-22 The Dow Chemical Company Membrane electrolyzer
US5209836A (en) * 1991-12-19 1993-05-11 Olin Corporation Baseplate for electrolytic cell with a liquid metal cathode
DE19844059A1 (de) * 1998-09-25 2000-03-30 Degussa Elektrolysezelle und deren Verwendung
US8808512B2 (en) 2013-01-22 2014-08-19 GTA, Inc. Electrolyzer apparatus and method of making it
US9222178B2 (en) 2013-01-22 2015-12-29 GTA, Inc. Electrolyzer

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1109311A (en) * 1912-01-06 1914-09-01 Edward A Allen Method and means for electrolyzing saline solutions.
US1187903A (en) * 1913-06-30 1916-06-20 William E Greenawalt Electrolytic apparatus.
GB1380418A (en) * 1971-01-27 1975-01-15 Electric Power Storage Ltd Electrolysis of chloride solutions
US3976550A (en) * 1971-09-22 1976-08-24 Oronzio De Nora Implanti Elettrochimici S.P.A. Horizontal, planar, bipolar diaphragm cells
US3770611A (en) * 1971-11-24 1973-11-06 Olin Corp Multiple tier horizontal diaphragm cells
US4036714A (en) * 1972-10-19 1977-07-19 E. I. Du Pont De Nemours And Company, Inc. Electrolytic cells and processes
US3901774A (en) * 1973-04-10 1975-08-26 Tokuyama Soda Kk Method of electrolyzing alkali metal halide solution and apparatus therefor
US3893897A (en) * 1974-04-12 1975-07-08 Ppg Industries Inc Method of operating electrolytic diaphragm cells having horizontal electrodes
US3976556A (en) * 1974-12-05 1976-08-24 Oronzio De Nora Impianti Elettrochimici S.P.A. Electrolysis cell
FR2339684A1 (fr) * 1976-01-30 1977-08-26 Commissariat Energie Atomique Electrolyseur horizontal a diaphragme
DE3276182D1 (en) * 1981-10-22 1987-06-04 Kanegafuchi Chemical Ind An electrolysis process and electrolytic cell
US4436608A (en) * 1982-08-26 1984-03-13 Diamond Shamrock Corporation Narrow gap gas electrode electrolytic cell

Also Published As

Publication number Publication date
FI852746L (fi) 1986-01-14
ATE36875T1 (de) 1988-09-15
ES288013U (es) 1985-11-16
EP0170092A1 (de) 1986-02-05
DE3425862A1 (de) 1986-01-23
FI76837B (fi) 1988-08-31
FI852746A0 (fi) 1985-07-11
AU573356B2 (en) 1988-06-02
US4615783A (en) 1986-10-07
ZA855260B (en) 1986-03-26
FI76837C (fi) 1988-12-12
CA1254532A (en) 1989-05-23
NO163786C (no) 1990-07-18
NO163786B (no) 1990-04-09
NO852813L (no) 1986-01-14
AU4487585A (en) 1986-01-16
ES288013Y (es) 1986-06-16
DE3564703D1 (en) 1988-10-06
IN164954B (enrdf_load_stackoverflow) 1989-07-15

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