EP0306627B1 - .Cellule électrochimique à membrane avec des electrodes plates disposées de chaque côté de la membrane - Google Patents

.Cellule électrochimique à membrane avec des electrodes plates disposées de chaque côté de la membrane Download PDF

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Publication number
EP0306627B1
EP0306627B1 EP88109169A EP88109169A EP0306627B1 EP 0306627 B1 EP0306627 B1 EP 0306627B1 EP 88109169 A EP88109169 A EP 88109169A EP 88109169 A EP88109169 A EP 88109169A EP 0306627 B1 EP0306627 B1 EP 0306627B1
Authority
EP
European Patent Office
Prior art keywords
membrane cell
electrode
electrochemical membrane
support
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.)
Expired - Lifetime
Application number
EP88109169A
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German (de)
English (en)
Other versions
EP0306627A1 (fr
Inventor
Peter Fabian
Helmut Krebs
Heinrich Simon
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.)
De Nora Deutschland GmbH
Original Assignee
Heraeus Elektrochemie GmbH
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 Heraeus Elektrochemie GmbH filed Critical Heraeus Elektrochemie GmbH
Publication of EP0306627A1 publication Critical patent/EP0306627A1/fr
Application granted granted Critical
Publication of EP0306627B1 publication Critical patent/EP0306627B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C25B9/60—Constructional parts of cells
    • C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
    • 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
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form

Definitions

  • the invention relates to an electrochemical membrane cell with a flat electrode structure arranged on both sides of a membrane, at least the anodic electrode structure being connected via metallic spacers to a support made of sheet metal serving as a current distributor.
  • An electrolytic cell that works according to the membrane method is known from EP-OS 55 930. It is also referred to below as a membrane cell.
  • the actual electrode structure is explained in more detail, for example, in DE-OS 36 25 506, in which a film-like membrane with electrodes on both sides is described.
  • DE-PS 35 19 272 an electrode structure suitable for membrane cells is known, which has a metal plate support serving as a current distributor, on which a plurality of plate-shaped electrode parts form a lamella structure with a flat surface, which is pressed directly onto the membrane.
  • the fixed mechanical connection between the metal plate carrier serving as a current distributor and the plate-shaped active electrode parts, which have to be separated from one another in the event of reactivation or repair of the electrodes, proves to be problematic with the metal spacers or elevations of the carrier. This is usually done by mechanical separation processes such as milling, drilling or grinding. After reactivation, the electrode surface is again connected to the current distributor electrically and mechanically by welding using spacers.
  • DE-A 22 56 713 describes a contact device for electrochemical processes (such as galvanic baths), in which a housing is provided with fixed side parts which, for the purpose of contacting an insertable goods rod, protrudes from the side parts, resilient Contains contact elements that make the use of electrical tapes or foils unnecessary.
  • the object of the invention is to create an electrochemical membrane cell with an electrode structure which has easily removable active electrode surfaces which can be removed from their supports without any particular mechanical effort, but nevertheless enable good current transmission in the operating state.
  • At least one bracket serving as a spacer with a U-shaped cross-section with converging legs is arranged on the support serving as a current distributor and is bent apart again in the region of its free ends, the ends of these legs facing away from the support to open; the clip is connected to the carrier in an electrically conductive and mechanically fixed manner.
  • a comb-like elevation of the electrode plate which is perpendicular to, engages in this clamp whose plate level is arranged. The comb-like elevation is formed by a bent edge of the electrode plate.
  • the clips have contact surfaces at their ends, which run parallel to the flat electrode surfaces.
  • the electrode surface is fixed and contacted by the clamp holder.
  • the pressure on the cell membrane presses the electrode surface against the contact surfaces of the clamp.
  • the carrier consists of sheet metal with a thickness in the range of 0.4 to 3 mm.
  • the clamp holder consists of a clamp spring 3 with a U-shaped cross section and firmly connected to the carrier 1 by welding points 2 converging legs 4, 5 which are bent apart again in the region of their free ends and end in contact surfaces 14; the contact surfaces 14 run parallel to the plane of the carrier 1.
  • two rows are each provided with three such clamp springs, the central strip 6 arranged between the legs 4 and 5 via strips 7 arranged vertically and fastening webs 8 arranged parallel to the plane of the carrier 1 connected is.
  • the fastening webs 8 are connected to the carrier 1 by welding points 2.
  • Center strip 6, strip 7 and fastening webs 8 form a meandering continuous strip with extensions in the area of the legs 4, 5, which is punched out of elastic metal and bent accordingly.
  • a part of the electrode plate 10 is shown above the carrier 1, which in the present case consists of three partial plates 11, of which the two outer partial plates as well as the underlying carrier 1 are not shown completely or with a gap for a better overview.
  • the partial plates 11 each have at their edges angled edges 12 which are arranged such that the surface of the electrode plate 10 forms a continuous plane.
  • the edges 12 form the rigid part 13 of the releasable clamping bracket in the form of a comb-like elevation.
  • FIG. 1b shows a detail of how the edges of the partial plates 11 combined into a part 13 are inserted into the open end of the clamp spring 3 and are held in place by a non-positive connection between the clamp spring 3 and the rigid part 13.
  • the rigid part 13 of the electrode plate is inserted into the clamp spring 3 until the surfaces 14 of the legs 4, 5 and the underside of the electrode plate are brought up to the stop 1 against the stop.
  • the electrode plate can consist, for example, of a sheet metal slit like a blind. However, it is also possible to use other types of electrodes, such as. B. wire, nets, expanded metal, lamellar arranged flat profiles to provide.
  • the carrier 1 forms a type of electrode trough which, together with the correspondingly designed carrier of the counterelectrode, forms a closed space which is divided by the membrane into two electrolyte subspaces, ie into an anolyte space and a catholyte space. Are the two supports are each electrically separated from one another by the membrane or additional seals.
  • the electrolyte spaces are provided with their own liquid supply and discharge openings, the anolyte space being connected to the brine circuit, while water is supplied to the catholyte space. Means are also provided for removing the chlorine or hydrogen gas generated from the anolyte or catholyte space.
  • Steel or spring-hard nickel alloys are used as materials on the cathode side, while titanium with good spring properties or titanium alloys are used on the anode side.
  • the edges 12 of the partial plates 11, which serve as a rigid part 13 of the spring system, can have incisions or gaps in order to achieve the best possible contact in the area of the clamp spring, despite the tolerances.
  • the number of clip springs essentially depends on the size of the electrode plates. With small electrode plates, it is possible to make do with a single spring clip.
  • FIG 2a another version of the clamping bracket is shown, in which the part 3 'connected to the carrier has a resilient area in the form of a sleeve which is provided with longitudinal slots 15 extending to its opening and is located on the side facing away from the carrier .
  • the sleeve has, on the jacket segments 16 forming its inside, a truncated cone-like taper starting from the opening 17, an annular groove 18 interrupted by the longitudinal slots 15 being provided in the region of the opening 17.
  • the sleeve is connected in an electrically conductive and mechanically fixed manner to the carrier 1, which is only shown in part.
  • a bolt-like region of the rigid part 13' is insertable, which is provided with a frustoconical end 20.
  • the rigid part 13 ' is at its widened end with an electrode plate 10 shown only partially electrically and mechanically firmly connected.
  • a circumferential ring flange 21 which is locked in the circumferential ring groove 18 when the end 20 is inserted into the sleeve.
  • the clamp holder shown in Figure 2a can For example, be designed as a single clamp bracket for small electrode areas. However, it is also possible to use them in a large number in accordance with the example explained with reference to FIGS. 1a and 1b.
  • the part 3 ⁇ connected to the carrier has as a resilient region a sleeve which is provided on its outside with a truncated cone-shaped tapering made of shell segments 16 ⁇ in the direction of its opening 17.
  • the outer edge of the opening 17 is designed as an annular flange 22 interrupted by longitudinal slots 15.
  • the resilient part 3 ⁇ is connected at its end 26 opposite the opening 17 to the support 1, which is only shown in part, in an electrically conductive and mechanically fixed manner.
  • the area of the clamping bracket designed as a rigid part 13 ⁇ is provided with a bolt-like area which can be pushed onto the jacket segments 16 ⁇ .
  • the bolt-like area has on its inside 23 a truncated cone-like taper starting from the open end 24.
  • a circumferential annular groove 25 In the transition area between the tapering of the inside 23 and a hollow cylinder in the rigid part 13 ⁇ there is a circumferential annular groove 25, in which the annular flange 22 can be locked when it is put on.
  • both the sleeve of the rigid part 13 ⁇ and the electrode plate 10 are only shown in fragments in FIG. 2b.
  • connection proves to be extremely stable after the ring flange 22 has been locked in the ring groove 25, the interaction of the two frustoconical surfaces likewise increasing the pressure.
  • the electrode structure i.e. H.
  • the electrode shape of FIGS. 2a, 2b can be designed in accordance with the explanations given for FIGS. 1a, 1b; the same applies to the materials used.
  • the locking device must be released by auxiliary tools such as screwdrivers before reactivating the active electrode parts. According to the invention, the follow-up costs in the long-term operation of membrane cells can be considerably reduced, since the detachment and reinstallation of the active electrode surfaces can be carried out quickly, gently and inexpensively without problems.

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  • 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)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Hybrid Cells (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Claims (7)

  1. Cellule électrochimique à membrane avec structure d'électrodes plates disposées de part et d'autre d'une membrane, où au moins la structure anodique de l'électrode est reliée par des entretoises métalliques à un support en tôle métallique servant de répartiteur de courant, caractérisée en ce que les entretoises sont réalisées sous la forme d'une fixation agrafée composée d'une partie élastique (3, 3', 3") et d'une partie essentiellement rigide (13, 13', 13"), la partie élastique étant solidaire du support (1).
  2. Cellule électrochimique à membrane, caractérisée en ce que la partie solidaire du support présente une agrafe élastique (3) dont la section est en forme de U, les extrémités libres des branches (4, 5) étant recourbées afin de former une surface de contact (14).
  3. Cellule électrochimique à membrane selon la revendication 1 ou 2, caractérisée en ce que la partie rigide (13) forme une saillie en forme de peigne par rapport à l'élément d'électrode plat.
  4. Cellule électrochimique à membrane selon la revendication 3, caractérisée en ce que l'élément d'électrode plat prend la forme d'une plaque d'électrodes (10) et en ce que la saillie en forme de peigne se compose d'au moins une arête recourbée (12) d'une plaque d'électrodes qui s'insère dans la fixation agrafée jusqu'à la butée contre les surfaces de contact (14).
  5. Cellule électrochimique à membrane selon la revendication 4, caractérisée en ce que la plaque d'électrodes (10) se compose de plusieurs plaques élémentaires (11) dont les arêtes (12) adjacentes constituent la saillie en forme de peigne qui s'insère dans la fixation agrafée.
  6. Cellule électrochimique à membrane selon la revendication 1, caractérisée en ce que la partie (3', 3") solidaire du support (1) présente une zone élastique sous la forme d'une douille dotée de fentes longitudinales (15) qui se trouvent à l'extrémité opposée au support (1).
  7. Cellule électrochimique à membrane selon la revendication 6, caractérisée en ce que la partie rigide présente une zone en forme de goujon qui s'engage dans la douille.
EP88109169A 1987-08-11 1988-06-09 .Cellule électrochimique à membrane avec des electrodes plates disposées de chaque côté de la membrane Expired - Lifetime EP0306627B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3726674 1987-08-11
DE19873726674 DE3726674A1 (de) 1987-08-11 1987-08-11 Elektrodenstruktur fuer elektrochemische zellen

Publications (2)

Publication Number Publication Date
EP0306627A1 EP0306627A1 (fr) 1989-03-15
EP0306627B1 true EP0306627B1 (fr) 1992-05-06

Family

ID=6333508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109169A Expired - Lifetime EP0306627B1 (fr) 1987-08-11 1988-06-09 .Cellule électrochimique à membrane avec des electrodes plates disposées de chaque côté de la membrane

Country Status (6)

Country Link
US (1) US4855032A (fr)
EP (1) EP0306627B1 (fr)
JP (1) JP2607278B2 (fr)
KR (1) KR890004461A (fr)
DE (2) DE3726674A1 (fr)
ES (1) ES2031178T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8911566D0 (en) * 1989-05-19 1989-07-05 Sun Ind Coatings Plating system
DE4212678A1 (de) * 1992-04-16 1993-10-21 Heraeus Elektrochemie Elektrochemische Membran-Zelle
JP3110551B2 (ja) * 1992-04-30 2000-11-20 クロリンエンジニアズ株式会社 電解槽
US5322560A (en) * 1993-08-31 1994-06-21 Basf Corporation Aluminum flake pigment treated with time release corrosion inhibiting compounds and coatings containing the same
DE4442388C2 (de) * 1994-11-29 1999-01-07 Heraeus Elektrochemie Elektrode mit plattenförmigem Elektrodenträger
IT1279069B1 (it) * 1995-11-22 1997-12-04 Permelec Spa Nora Migliorato tipo di elettrodo per elettrolizzatori a membrana a scambio ionico
NL1006552C1 (nl) * 1997-07-11 1999-01-12 Magneto Chemie Bv Anode op basis van lood.
SE9800698D0 (sv) 1998-03-05 1998-03-05 Permascand Ab Device for electrochemical cell
JP7289077B2 (ja) * 2018-07-13 2023-06-09 パナソニックＩｐマネジメント株式会社 電解水生成装置
EP4339334A1 (fr) * 2022-09-15 2024-03-20 thyssenkrupp nucera AG & Co. KGaA Cellule d'électrolyse avec éléments de support courbés

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1290099A (fr) * 1969-06-25 1972-09-20
US3725223A (en) * 1971-01-18 1973-04-03 Electronor Corp Baffles for dimensionally stable metal anodes and methods of using same
DE2256713A1 (de) * 1972-11-18 1974-05-22 Gerhard Joehren Kontaktvorrichtung zur stromuebertragung bei elektrochemischen verfahren
BG22892A1 (fr) * 1976-03-03 1977-05-20
IT1118243B (it) * 1978-07-27 1986-02-24 Elche Ltd Cella di elettrolisi monopolare
IT1163737B (it) * 1979-11-29 1987-04-08 Oronzio De Nora Impianti Elettrolizzatore bipolare comprendente mezzi per generare la ricircolazione interna dell'elettrolita e procedimento di elettrolisi
US4368109A (en) * 1980-11-05 1983-01-11 Olin Corporation Electrolytic cell with inter-electrode spacer means
FI72150C (fi) * 1980-11-15 1987-04-13 Asahi Glass Co Ltd Alkalimetallkloridelektrolyscell.
JPS58123885A (ja) * 1982-01-20 1983-07-23 Kanto Denka Kogyo Kk イオン交換膜法食塩電解槽用陰極構造体
DE3223701A1 (de) * 1982-06-25 1983-12-29 Metallgesellschaft Ag, 6000 Frankfurt Membran-elektrolysezelle mit vertikal angeordneten elektroden
US4738763A (en) * 1983-12-07 1988-04-19 Eltech Systems Corporation Monopolar, bipolar and/or hybrid membrane cell
DE3519272C1 (de) * 1985-05-30 1986-12-18 Heraeus Elektroden GmbH, 6450 Hanau Elektrodenstruktur fuer elektrochemische Zellen
NL8601906A (nl) * 1985-07-29 1987-02-16 Permelec Electrode Ltd Electrode voor electrolyse bij toepassing van een diafragma.

Also Published As

Publication number Publication date
KR890004461A (ko) 1989-04-22
ES2031178T3 (es) 1992-12-01
JP2607278B2 (ja) 1997-05-07
US4855032A (en) 1989-08-08
DE3726674A1 (de) 1989-02-23
DE3870771D1 (de) 1992-06-11
EP0306627A1 (fr) 1989-03-15
JPS6455392A (en) 1989-03-02

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