EP0253430A1 - Elektrolysezelle der Filterpressenbauart - Google Patents

Elektrolysezelle der Filterpressenbauart Download PDF

Info

Publication number
EP0253430A1
EP0253430A1 EP87201238A EP87201238A EP0253430A1 EP 0253430 A1 EP0253430 A1 EP 0253430A1 EP 87201238 A EP87201238 A EP 87201238A EP 87201238 A EP87201238 A EP 87201238A EP 0253430 A1 EP0253430 A1 EP 0253430A1
Authority
EP
European Patent Office
Prior art keywords
frames
electrodes
electrolyser
electrolyser according
frame
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
EP87201238A
Other languages
English (en)
French (fr)
Other versions
EP0253430B1 (de
Inventor
Jean-Paul Detournay
Emile Cabaraux
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.)
Solvay SA
Original Assignee
Solvay SA
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 Solvay SA filed Critical Solvay SA
Priority to AT87201238T priority Critical patent/ATE67525T1/de
Publication of EP0253430A1 publication Critical patent/EP0253430A1/de
Application granted granted Critical
Publication of EP0253430B1 publication Critical patent/EP0253430B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type

Definitions

  • the invention relates to an electrolyser of the filter press type.
  • Electrolysers of the filter press type are generally formed by a stack of vertical frames which delimit electrolysis chambers in which electrodes are arranged vertically. Membranes with selective permeability or diaphragms permeable to electrolytes can be interposed between the consecutive frames, to separate the electrolysis chambers.
  • electrolysers of this type generally have the distinction of being made up of a stack of elements made of different materials.
  • BE-A-858100 DIAMOND SHAMROCK CORPORATION
  • an electrolyser is described which is formed from a stack of rigid metal frames and membranes with selective permeability; seals are interposed between the frames and the membranes and electrodes are housed in the chambers delimited by the frames and the membranes.
  • EP-A-80287 and EP-A-80288 IMPERIAL CHEMICAL INDUSTRIES PLC
  • an electrolyser is described formed from a stack of metal plates serving as electrodes, and from membranes with selective permeability; seals made of a flexible material are interposed between the plates and the membranes.
  • the invention overcomes these drawbacks by providing an electrolyser of the filter press type, of a new design, in which the number of different elements of the stack is reduced and whose construction is facilitated and the sealing improved, without generating excessive voltages in frames and electrodes.
  • the invention relates to an electrolyser of the filter press type, comprising a stack of vertical frames delimiting electrolysis chambers containing vertical electrodes; according to the invention, the frames are made of a flexible material, they are freely deployed on the periphery of the electrodes and they are elastically deformed by compression against each other, between two end flanges.
  • the frames are made of a flexible material, elastically deformable by compression. Their rigidity may generally be insufficient for them to retain their profile, in an upright position, so that they naturally collapse on themselves under the effect of their own weight. In general, they are made of an elastomeric material whose Shore A hardness (defined by standard ASTM D2240-75) is between 40 and 90 units, preferably between 50 and 80 units. The choice of material for the frames is also conditioned by the need for them to withstand sufficiently the chemical and thermal conditions normally prevailing in the electrolyser during its operation.
  • Elastomeric copolymers derived from ethylene and propylene are well suited in the case of electrolysers for the production of chlorine and aqueous solutions of sodium hydroxide by electrolysis of aqueous solutions of sodium chloride.
  • Preferred examples of such copolymers are those designated EPM which are copolymers of ethylene and propylene containing between 25 and 60% of propylene and those designated EPDM which are terpolymers of ethylene, propylene and a diene to unconjugated double bonds.
  • the frames can have any profile compatible with the production of the electrolysis chambers, for example a circular, oval, rectangular or polygonal profile. According to the invention, they are deployed at the periphery of the electrodes which, thanks to their rigidity, constitute a frame for the frames.
  • the electrodes must therefore have a profile and dimensions compatible with the profile and dimensions of the frames, so that they fit into the opening defined by the frames and then give them a stable profile.
  • They can for example be made up of solid or perforated metal plates, flat or corrugated, rods or horizontal or vertical metal strips. They must have sufficient rigidity to support the frames in a vertical position, without deforming.
  • the frames overlap the electrodes over their entire periphery and freely surround the periphery of the electrodes. They can rest freely on the periphery of the electrodes without being secured to it.
  • a frame of the stack is deployed on several electrodes or that several consecutive frames of the stack are deployed together on the same electrode. It is generally preferred to associate an individual frame with each electrode.
  • the stacking frames are compressed against each other between two end flanges which thus serve as non-deformable vertical supports for stacking the frames.
  • the compression is adjusted so that the frames are elastically deformed, enough to seal the stack.
  • the optimum value for compression depends on the material of the frames and must be determined in each particular case. Compression can be ensured by any suitable means, for example by means of tie rods connecting the flanges to one another.
  • the end flanges can be shutter panels of the electrolyser. Alternatively, they can be profiled so as to delimit a electrolysis chamber or a circulation chamber for the electrolyte.
  • the electrolyser according to the invention is generally placed on a base which can be, for example, a concrete or masonry base or a frame of metal beams, fixed or mobile on a raceway.
  • the invention applies equally to bipolar electrolysers and to monopolar electrolysers.
  • the electrolyser according to the invention is generally provided with conduits for the admission and evacuation of the products participating in the electrolysis.
  • These conduits can advantageously be formed by the juxtaposition of tubular sections formed in the frames of the stack, as described in document EP-A-80287.
  • the electrolyser comprises devices for centering the electrodes in their respective frames.
  • Centering devices must be designed in such a way as to limit their obstacle to the free deformation of the frames to a minimum value when they are compressed against each other to form the wall of the electrolyser.
  • they may comprise members for locally fixing the electrodes to the frames, which are arranged at intervals on the periphery of the frames, so that between two consecutive fixing members, the frames can deform freely , unhindered.
  • the frames include lateral tenons which rest on corresponding supports which are integral electrodes. It is advantageously possible to provide four pairs of tenon-notch or tenon-support on the periphery of the frame to center the electrode in the frame.
  • This embodiment of the invention finds an interesting application in electrolysers of the monopolar type in which the electrodes are individually fixed to electrical conductors which pass through watertight cylindrical openings made through the frames to be coupled to bus bars arranged outside the electrolyser.
  • the electrical conductors serve as devices for local attachment of the electrodes to the frames and are formed for this purpose of rigid metal bars, the section of which is preferably circular or oval.
  • the tightness of the bars passing through the corresponding cylindrical openings of the frame can be obtained by elastic clamping of the bars in their cylindrical openings and / or by means of a coating interposed between the bars and the cylindrical wall of the openings.
  • the seal can be reinforced by means of sealing lips integral with the frame, as shown in FIG. 4 of patent FR-A-1593242.
  • the respective dimensions of the frames and the electrodes are adjusted so as to provide a substantial spacing between at least part of the peripheral edge of the electrodes and the frames.
  • electrodes are used whose height and width are respectively less than the height and the width of the rectangular opening of the corresponding frame. This embodiment of the invention further reduces the obstacles to local deformations and displacements of the frames during the assembly of the electrolyser and its operation.
  • the spacing between the peripheral edge of the electrodes and the frames is sufficient so that, during the assembly of the electrolyser and the operation thereof, the frames can swell transversely without being hindered by the electrodes or, where appropriate, without the voltages internal traction and compression which would be generated respectively in the frames and in the electrodes exceed a critical threshold, this being for example defined by the elastic limit of the material of the frames and by the resistance of the electrodes to buckling.
  • the optimum spacing to be provided between the frames and the electrodes depends on several parameters including among others the profile and the dimensions of the frames and the electrodes, the material constituting the frames, in particular its modulus of elasticity, and the forces compression of the frames against each other between the end flanges. It must be determined in each particular case by a routine calculation.
  • the flanges are placed on the base, the electrodes are supported by the frames and the frames are supported above the base by the frictional forces generated between the frames and the flanges.
  • This embodiment of the invention allows local deformations and displacements of the stacking frames, in particular under the effect of local variations in pressure or temperature in the electrolysis chambers.
  • This embodiment of the invention is well suited to electrolysers of small dimensions, comprising a limited number of frames, for example less than 50 consecutive frames.
  • the frames are suspended from the electrodes and these are fixed to rigid electrical conductors which pass through the frames in a sealed manner and are supported on an adequate support.
  • the electrical conductors have a double function: on the one hand, they serve as an electrical junction between the electrodes and a source of direct current; on the other hand they used to carry the electrodes and the frames.
  • the invention makes it possible to effectively improve the tightness of electrolysers of the filter press type with stacking of frames, by making it possible to select deformable frames of optimum flexibility and to adjust the compression of the frames at will. It finds a particularly advantageous application for the design of electrolysers in which the anode chambers are isolated from the cathode chambers by ion-permeable separators.
  • the separators are generally sheets interposed between the successive frames of the stack and made of a material capable of being traversed by an ion current during the operation of the electrolyser. They can be either diaphragms permeable to aqueous electrolytes or membranes with selective permeability.
  • diaphragms which can be used in the electrolyser according to the invention are asbestos diaphragms, such as those described in patent US-A-1855497 (STUART) and in patents FR-A-2400569, EP-A-1634 and EP-A-18034 (SOLVAY & Cie) and diaphragms made of organic polymers, such as those described in patents FR-A-2170247 (IMPERIAL CHEMICAL INDUSTRIES PLC) and in patents EP-A-7674 and EP-A-37140 (SOLVAY & Cie).
  • asbestos diaphragms such as those described in patent US-A-1855497 (STUART) and in patents FR-A-2400569, EP-A-1634 and EP-A-18034 (SOLVAY & Cie)
  • diaphragms made of organic polymers such as those described in patents FR-A-2170247 (IMPERIAL CHEMICAL INDUSTRIES PLC)
  • membranes with selective permeability is understood to mean thin, non-porous membranes comprising an ion-exchange material.
  • the choice of the material constituting the membranes and of the ion exchange material will depend on the nature of the electrolytes subjected to the electrolysis and on the products which it is sought to obtain.
  • the material of the membranes is chosen from those which are capable of withstanding the thermal and chemical conditions normally prevailing in the electrolyser during electrolysis, the ion exchange material being chosen from anion exchange materials or cation exchange materials, depending on the electrolysis operations for which the electrolyser is intended.
  • membranes which are well suited are cationic membranes in fluoropolymer, preferably perfluorinated, containing cationic functional groups derived from sulfonic acids, carboxylic acids or phosphonic acids or mixtures of such functional groups.
  • membranes of this type are those described in patents GB-A-1497748 and GB-A-1497749 (ASAHI KASEI KOGYO KK), GB-A-1518387, GB-A-1522877 and US-A-4126588 (ASAHI GLASS COMPANY LTD) and GB-A-1402920 (DIAMOND SHAMROCK CORP.).
  • Membranes which are particularly suitable for this application of the cell according to the invention are those known under the names "NAFION” (DU PONT DE NEMOURS & Co) and "FLEMION” (ASAHI GLASS COMPANY LTD).
  • the electrolyser according to the invention finds a particularly advantageous application for the production of chlorine and aqueous solutions of sodium hydroxide by electrolysis of aqueous solutions of sodium chloride.
  • the invention has the advantageous result of facilitating and improving the tightness of electrolysers of the filter press type.
  • the tightness of the stack of frames and membranes can indeed be easily ensured by the elastic compression of the frames, without requiring additional seals, or sealing, gluing or welding. frames and membranes.
  • the invention does not however exclude that in addition to compression, the frames may possibly be welded or glued.
  • the electrolyser shown in FIG. 1 is formed by a stack of alternately anodic 1 and cathodic 2 vertical frames, between two rigid end flanges 3 and 4, on a base 24.
  • Selectively permeable membranes 5 are interposed between the frames 1 and 2 to delimit alternately anode 6 and cathode 7 electrolysis chambers, respectively containing anodes 8 and cathodes 9.
  • the anode 1 and cathode 2 frames are made of an elastomeric material characterized by a Shore A hardness of less than 80 units, for example a copolymer derived from ethylene and propylene such as those designated EPM and EPDM.
  • FIGS. 2, 3 and 4 show an anode frame 1 associated with an anode 8.
  • the frame 1 is freely deployed at the periphery of the anode 8 which is formed for this purpose of two rectangular vertical metal plates 10, arranged opposite one another inside the opening 11 of the frame 1.
  • the two plates 10 are secured to horizontal metal bars 12 by means of jumpers 13.
  • the bars 12 pass through watertight cylindrical openings 55 made in a vertical upright 14 of the frame 1 and are embedded in notches 15 of the other upright 16 of the frame, so as to center the anode in the frame.
  • the height and width of the plates 10 are chosen to be approximately equal, although slightly less, to the height and width of the opening 11 of the frame 1, so that the anode 8 thus constitutes a frame for the frame 1, all by leaving a small gap 54 between it and the frame.
  • the bars 12 are extended beyond the upright 14, outside the opening 11, to be connected to a bus bar, not shown, coupled to the positive terminal of a direct current source.
  • the bars 12 thus simultaneously constitute electrical conductors for the anode 8 and local attachment members of the anode 8 to the frame 1.
  • the cathodes 9 are associated in a similar manner to the cathode frames 2, for which they also constitute a frame. To this end, they also comprise a pair of vertical rectangular metal plates 17 arranged opposite one another inside the opening 18 of the frame 2 ( Figures 1 and 5).
  • the plates 17 have a height and a width approximately equal, although slightly less, to the height and the width of the opening 18 of the frame 2 and they are centered in the latter by means of bars or tenons 19 and 20 welded to the plates and embedded in corresponding openings 56 formed in the uprights 21 and 22 of the frame.
  • the bars 19 are extended outside the frame 2 to be connected to a bus bar coupled to the negative terminal of the current source.
  • connection of the anode bars 12 and the cathode bars 19 to their respective bus bars is carried out by means of flexible conductors, formed of braided metal strands, so as not to hinder a free movement of stacking frames.
  • the plates 10 and 17 forming the electrodes are preferably perforated; they may for example be sheets pierced with openings, expanded metal sheets or rigid lattices.
  • the frames 1 and 2 and the membranes 5 are compressed between the flanges 3 and 4 by means of tie rods 23 and the sealing of the assembly is ensured by the elastic deformation of the frames 1 and 2, without require additional sealing devices. Thanks to the gaps 54 formed between the plates 10 and 17 of the electrodes and their respective frames 1 and 2, these can swell transversely without being hindered by the electrodes, when they are compressed between the flanges 3 and 4.
  • the frames 1 and 2 and the membranes 5 are pierced with four marginal openings 25, 26, 27 and 28 which, aligned in the electrolyser, respectively form four separate horizontal collectors which open respectively into four openings 33 formed through the flange 3. These collectors are used for the admission of electrolytes to be electrolyzed in the electrolysis chambers 6 and 7 and for the evacuation of the products of electrolysis.
  • the marginal openings 25 and 27 are in communication with the central opening 11, via conduits 34 and 35 and, in the cathode frames 2, the marginal openings 26 and 28 are in communication with the central opening 18 via conduits 36 and 35.
  • FIG. 7 relates to another embodiment of the electrolyser according to the invention, in which the anode frames 1 are suspended from the anodes 8 and these are supported on a metal frame 38.
  • each anode frame 1 is disposed around the pair of plates 10 forming the anode 8, as explained above with reference to FIGS. 1 to 4, the bars 12 have one end fixed to a transverse support plate 39 by means of screws or bolts 40, l 'other end of the bars is embedded in a suitable opening 41 of another transverse support plate 42 and the plates 39 and 42 are supported on horizontal beams 43 of the frame 38. Insulators 45 are interposed between the beams 43 and the plates 39 and 42.
  • the cathode frames 2 and their cathodes 9 are retained in the stack by compression between the anode frames, as in the embodiment of FIGS. 1 to 5.
  • the frame 38 may optionally include additional beams 44 serving as intermediate supports for the frames.
  • the anode frames 1 have a peripheral rib 46 which surrounds the cathode frames 2 and serves to support them and to center them in the stack.
  • armatures may possibly be embedded in the lower longitudinal members 52 and / or upper 53 of the anode 1 and cathode 2 frames.
  • reinforcements have the function of increasing the flexural strength of the side members 52 and / or 53 of the frames. They can for example consist of metal bars or rods;
  • the plates 10 of the anodes 8 can, in a manner known per se, be made in titanium and wear a coating of an active material for the discharge of chloride ions, such as a mixture of ruthenium oxide and titanium dioxide, by example.
  • the bars 12 can be made of titanium.
  • bars obtained by cofiling a copper core in a titanium sheath are used.
  • the plates 17 of the cathodes 9 can be made of any suitable material, for example steel or nickel.
  • the anode frames 1 are set back with respect to the cathode frames 2, inside the electrolyser.
  • the face 47 delimiting the central opening 11 of the anode frames 1 is wrapped in a sheet 48 of a fluorinated polymer, preferably perfluorinated such as polytetrafluoroethylene.
  • a fluorinated polymer preferably perfluorinated such as polytetrafluoroethylene.
  • the casing 48 of FIG. 11 is replaced by two annular sheets 49 which protrude in front of the face 47, at the inside the anode chamber 6.
  • each anode frame 1 has two peripheral annular cutouts 50 which open into the anode chamber opposite the membranes and rings 51 made of a fluoropolymer such as polytetrafluoroethylene are housed in these cutouts 50.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Engineering & Computer Science (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Inorganic Insulating Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Battery Electrode And Active Subsutance (AREA)
EP87201238A 1986-07-09 1987-06-29 Elektrolysezelle der Filterpressenbauart Expired - Lifetime EP0253430B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87201238T ATE67525T1 (de) 1986-07-09 1987-06-29 Elektrolysezelle der filterpressenbauart.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8610143 1986-07-09
FR8610143A FR2601387B1 (fr) 1986-07-09 1986-07-09 Electrolyseur du type filtre-presse

Publications (2)

Publication Number Publication Date
EP0253430A1 true EP0253430A1 (de) 1988-01-20
EP0253430B1 EP0253430B1 (de) 1991-09-18

Family

ID=9337353

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201238A Expired - Lifetime EP0253430B1 (de) 1986-07-09 1987-06-29 Elektrolysezelle der Filterpressenbauart

Country Status (11)

Country Link
US (1) US4800008A (de)
EP (1) EP0253430B1 (de)
JP (1) JPS6326391A (de)
CN (1) CN1013453B (de)
AT (1) ATE67525T1 (de)
BR (1) BR8703493A (de)
CA (1) CA1334019C (de)
DE (1) DE3773068D1 (de)
DK (1) DK352487A (de)
FR (1) FR2601387B1 (de)
PT (1) PT85272B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5474581A (en) * 1991-07-19 1995-12-12 Solvay (Societe Anonyme) Method for producing an aqueous sodium chloride solution and use thereof
US5478447A (en) * 1991-09-10 1995-12-26 Solvay (Societe Anonyme) Method for producing an aqueous industrial sodium chloride solution

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5340458A (en) * 1992-12-08 1994-08-23 Toho Technical Service Co., Ltd. Electrolytic ion water generator
US6040072A (en) * 1997-11-19 2000-03-21 Lynntech, Inc. Apparatus and method for compressing a stack of electrochemical cells
US7037618B2 (en) * 2002-06-05 2006-05-02 Lynntech, Inc. Apparatus and method for compressing a stack of electrochemical cells
US20040214067A1 (en) * 2002-12-04 2004-10-28 Chris Boyer Assembling sub-stacks of electrochemical cells
US9187833B2 (en) * 2012-09-13 2015-11-17 Next Hydrogen Corporation Internally-reinforced water electrolyser module

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1593242A (de) * 1968-03-19 1970-05-25
EP0080288A1 (de) * 1981-11-24 1983-06-01 Imperial Chemical Industries Plc Elektrodenstruktur zur Verwendung in einer elektrolytischen Zelle vom Filterpressentyp
US4439298A (en) * 1982-07-26 1984-03-27 Olin Corporation Composite fiber reinforced plastic frame

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2821985C2 (de) * 1978-05-19 1982-07-01 Hooker Chemicals & Plastics Corp., 14302 Niagara Falls, N.Y. Elektrolysezellenblock
US4605482A (en) * 1981-04-28 1986-08-12 Asahi Glass Company, Ltd. Filter press type electrolytic cell
DE3266574D1 (en) * 1981-11-24 1985-10-31 Ici Plc Electrolytic cell of the filter press type
US4402813A (en) * 1982-07-26 1983-09-06 Olin Corporation Composite fiber reinforced plastic electrode frame
US4654134A (en) * 1985-08-02 1987-03-31 The Dow Chemical Company Combination seal and tentering means for electrolysis cells
US4695359A (en) * 1986-01-02 1987-09-22 Olin Corporation Filter press membrane electrolytic cell with diffusion bonded electrode elements and elastomeric frames

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1593242A (de) * 1968-03-19 1970-05-25
EP0080288A1 (de) * 1981-11-24 1983-06-01 Imperial Chemical Industries Plc Elektrodenstruktur zur Verwendung in einer elektrolytischen Zelle vom Filterpressentyp
US4439298A (en) * 1982-07-26 1984-03-27 Olin Corporation Composite fiber reinforced plastic frame

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5474581A (en) * 1991-07-19 1995-12-12 Solvay (Societe Anonyme) Method for producing an aqueous sodium chloride solution and use thereof
US5478447A (en) * 1991-09-10 1995-12-26 Solvay (Societe Anonyme) Method for producing an aqueous industrial sodium chloride solution

Also Published As

Publication number Publication date
ATE67525T1 (de) 1991-10-15
CN1013453B (zh) 1991-08-07
DK352487A (da) 1988-01-10
PT85272B (pt) 1994-11-30
JPS6326391A (ja) 1988-02-03
FR2601387B1 (fr) 1990-10-19
DK352487D0 (da) 1987-07-08
CA1334019C (fr) 1995-01-17
US4800008A (en) 1989-01-24
CN87104811A (zh) 1988-01-27
EP0253430B1 (de) 1991-09-18
BR8703493A (pt) 1988-03-22
PT85272A (pt) 1988-07-29
FR2601387A1 (fr) 1988-01-15
DE3773068D1 (de) 1991-10-24

Similar Documents

Publication Publication Date Title
EP0220659B1 (de) Bipolare Elektrolysevorrichtung und Einheitszelle für diese
CA2239862A1 (en) Method for the fabrication of electrochemical cells
FR2461021A1 (fr) Cellule electrolytique et electrolyseur bipolaire
EP0253430B1 (de) Elektrolysezelle der Filterpressenbauart
BE1004364A3 (fr) Chassis pour electrolyseur du type filtre-presse et electrolyseur monopolaire du type filtre-presse.
US4389289A (en) Bipolar electrolyzer
CA2168325C (fr) Caisson d'extremite d'un electrodialyseur, electrodialyseur equipe d'un tel caisson et utilisation dudit electrodialyseur
EP0076747B1 (de) Elektrolyseur der Filterpressenbauart
EP0400712B1 (de) Rahmen für Elektrolyseure der Filterpressenbauart und Elektrolyseure der Filterpressenbauart
EP0132079B1 (de) Verfahren zum Zusammenbau einer Elektrolysezelle der Filterpressenbauart
CA1106314A (fr) Cellule d'electrolyse a membrane pour la production d'un gaz
US20020005362A1 (en) Spiral feed and discharge manifold for electrolytic cells
LU84973A1 (fr) Cellule d'electrolyse
US5340457A (en) Electrolytic cell
EP0435385A1 (de) Elektrolytische Zelle für Gas-Herstellung, die ein Stapel von senkrechten Rahmen enthält
US4257866A (en) Electrolyzer cell
CA1052731A (fr) Electrode bipolaire et electrolyseur a electrodes bipolaires
LU86982A1 (fr) Electrode pour cellule d'electrolyse et electrolyseur du type monopolaire
US4056459A (en) Anode assembly for an electrolytic cell
EP0088461B1 (de) Elektrode zur elektrolytischen Gasherstellung und Elektrolysezelle mit selektiv-durchlässiger Membran
EP0608028A1 (de) Elektrolyseur zur Gaserzeugung
CH642112A5 (en) Electrolyser especially for the electrolysis of water under pressure
EP0466266A1 (de) Elektrolyseur mit mindestens zwei, längs einer gemeinsamen Trennwand elektrisch seriengeschalteten Elementarzellen
FR2615205A1 (fr) Procede pour l'assemblage d'un electrolyseur du type filtre-presse comprenant un empilage de cadres verticaux
MXPA01000274A (en) Spiral feed and discharge manifold for electrolytic cells

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19880701

17Q First examination report despatched

Effective date: 19891117

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH DE ES GB GR IT LI LU NL SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19910918

Ref country code: NL

Effective date: 19910918

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19910918

Ref country code: AT

Effective date: 19910918

REF Corresponds to:

Ref document number: 67525

Country of ref document: AT

Date of ref document: 19911015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3773068

Country of ref document: DE

Date of ref document: 19911024

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19911229

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
ITPR It: changes in ownership of a european patent

Owner name: CAMBIO RAGIONE SOCIALE;SOLVAY

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19920630

Ref country code: LI

Effective date: 19920630

Ref country code: CH

Effective date: 19920630

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19940526

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940621

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940629

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19950630

BERE Be: lapsed

Owner name: SOLVAY

Effective date: 19950630

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050629