EP0697473A1 - Cellule d'électrolyse à anodes consommables - Google Patents

Cellule d'électrolyse à anodes consommables Download PDF

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Publication number
EP0697473A1
EP0697473A1 EP95112394A EP95112394A EP0697473A1 EP 0697473 A1 EP0697473 A1 EP 0697473A1 EP 95112394 A EP95112394 A EP 95112394A EP 95112394 A EP95112394 A EP 95112394A EP 0697473 A1 EP0697473 A1 EP 0697473A1
Authority
EP
European Patent Office
Prior art keywords
electrodes
electrolyte
stacked
channel
electrode
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Withdrawn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
EP95112394A
Other languages
German (de)
English (en)
Inventor
Thomas Dr. Karcher
Hans Dr. Millauer
Manfred Wildt
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 EP0697473A1 publication Critical patent/EP0697473A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • C25B9/30—Cells comprising movable electrodes, e.g. rotary electrodes; Assemblies of constructional parts thereof

Definitions

  • the invention relates to an electrolytic cell with consumption anodes, which is provided with a feed line and a discharge line for electrolyte.
  • the anode process consists in the targeted dissolution of the metallic anode.
  • this measure produces the cations required to compensate for the anionic electrolysis products produced.
  • the use of the consumable anode avoids the anodic generation of protons, which would interfere with the desired cathodic synthesis process in the cases mentioned.
  • a flow-through electrolysis cell for the production of organic or organometallic compounds with a pair of electrodes is known.
  • One of the two electrodes is a consumable anode, which consists of a solid cylindrical metal block with a conically tapered end. This slides to the extent that the metal is consumed under the effect of its own weight in a hollow cone connected as a cathode and having the same geometric dimensions as the anode cone.
  • the hollow cone mentioned at the same time forms part of the outer cell wall.
  • a disadvantage of this construction is that the electrode area cannot be increased indefinitely without simultaneously increasing the reactor volume disproportionately. The provision of a larger electrode area therefore requires the installation of a larger number of cells.
  • an electrolysis cell of the type mentioned at the outset in which electrodes are stacked separately from one another by spacers which form an electrode gap, the stack being provided with a guide device in which the individual electrodes are slidably arranged, the individual ones Electrodes have openings which, in the case of stacked electrodes, form a channel for feeding the electrolyte into the electrode gap, one end of the channel being connected to the supply line for electrolyte and the other end being closed.
  • the electrodes can consist of composite electrodes in which the cathode and consumable anode are each connected to one another in an electrically conductive manner.
  • the composite electrodes are stacked and separated from one another by spacers.
  • the guiding device can comprise the electrode stack.
  • the individual electrodes can each have a central opening and the openings in the case of stacked electrodes form a central channel.
  • a tube can be arranged in the channel as a guide device and is provided with openings through which the electrolyte is supplied to the electrode gaps.
  • the cathodes can be made of steel, stainless steel, nickel, lead, zinc, iron, gold, platinum, copper, tin, cadmium, graphite, vitreous carbon or a composite of metal or graphite and plastic.
  • the consumable anodes can consist of a reducing metal, in particular magnesium, aluminum or zinc.
  • the main advantage of the invention is the fact that the ratio of electrode area to reactor volume is retained despite the consumption of the anodes. Furthermore, the cell can be easily adapted to the operating requirements.
  • cathodes 4 and consumable anodes 5 are alternately arranged in the housing 1 of the electrolytic cell, which is provided with a feed line 2 and a discharge line 3 for electrolyte.
  • the cathodes 4 and anodes 5 are separated from one another by a spacer 6, by means of which the electrode gap 7 is formed between the electrodes 4, 5.
  • the electrode stack is with one Provided guide device 8 in which the individual electrodes 4, 5 of circular, square or rectangular shape are slidably arranged.
  • the individual electrodes 4, 5 have openings which, when the electrodes are stacked, form a channel 9 for feeding the electrolyte into the electrode gaps 7, one end of the channel 9 being connected to the supply line 2 for electrolyte and the other end being closed.
  • the guide device 8 can consist of electrically non-conductive guide profiles, for example round rods, L, To.U. rails, which are arranged parallel to the stack axis and are firmly connected to the housing. These guide profiles can penetrate or include the stack.
  • the individual electrodes 4, 5 each have a central opening, which in the case of stacked electrodes forms a central channel 9 in which a tube 10 is arranged as a guide device 8 and at the same time as a feed line 2.
  • the tube 10 is provided with openings 11, e.g. provided with slots 11 running parallel to the axis, through which the electrolyte is supplied to the electrode gaps 7.
  • the spacer 6 consisting of plastic expediently has a network structure so that the electrolyte is distributed uniformly in the electrode gaps 7.
  • the electrode stack 4, 5 can be provided with a sealing collar 12 surrounding the tube 10 and a weight 13.
  • the sealing sleeve 12 is intended to prevent the direct leakage of the electrolyte into the housing 1 and the weight 13 to support the tracking of the electrodes 4, 5.
  • the electrodes 4, 5 can be provided with flexible connecting lines 14, 15.

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)
  • Prevention Of Electric Corrosion (AREA)
EP95112394A 1994-08-18 1995-08-07 Cellule d'électrolyse à anodes consommables Withdrawn EP0697473A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4429354A DE4429354A1 (de) 1994-08-18 1994-08-18 Elektrolysezelle mit Verzehranoden
DE4429354 1994-08-18

Publications (1)

Publication Number Publication Date
EP0697473A1 true EP0697473A1 (fr) 1996-02-21

Family

ID=6526032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95112394A Withdrawn EP0697473A1 (fr) 1994-08-18 1995-08-07 Cellule d'électrolyse à anodes consommables

Country Status (4)

Country Link
EP (1) EP0697473A1 (fr)
JP (1) JPH0860389A (fr)
CA (1) CA2156359A1 (fr)
DE (1) DE4429354A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19935452A1 (de) * 1999-07-28 2001-03-08 Basf Ag Faserhaltige Klebstoffzusammensetzung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013215A1 (fr) * 1978-12-20 1980-07-09 ECOPOL Société Anonyme Dispositif d'électrolyse
EP0219367A1 (fr) 1985-09-05 1987-04-22 Societe Nationale Des Poudres Et Explosifs Cellule d'électrolyse organique à électrode consommable
EP0283796A1 (fr) 1987-03-18 1988-09-28 Giuseppe Silvestri Dispositif pour la conversion d'une cellule électrolytique de type filtre-presse en cellules à électrodes réactives continuellement renouvelables
FR2617197A1 (fr) * 1987-06-25 1988-12-30 Poudres & Explosifs Ste Nale Cellule d'electrolyse a electrodes bipolaires consommables
US4800009A (en) * 1987-04-24 1989-01-24 Aleksandar Despic Electrochemical cell with moving electrode

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013215A1 (fr) * 1978-12-20 1980-07-09 ECOPOL Société Anonyme Dispositif d'électrolyse
EP0219367A1 (fr) 1985-09-05 1987-04-22 Societe Nationale Des Poudres Et Explosifs Cellule d'électrolyse organique à électrode consommable
EP0283796A1 (fr) 1987-03-18 1988-09-28 Giuseppe Silvestri Dispositif pour la conversion d'une cellule électrolytique de type filtre-presse en cellules à électrodes réactives continuellement renouvelables
US4800009A (en) * 1987-04-24 1989-01-24 Aleksandar Despic Electrochemical cell with moving electrode
FR2617197A1 (fr) * 1987-06-25 1988-12-30 Poudres & Explosifs Ste Nale Cellule d'electrolyse a electrodes bipolaires consommables

Also Published As

Publication number Publication date
JPH0860389A (ja) 1996-03-05
CA2156359A1 (fr) 1996-02-19
DE4429354A1 (de) 1996-02-22

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Inventor name: WILDT, MANFRED

Inventor name: MILLAUER, HANS, DR.

Inventor name: KARCHER, THOMAS, DR.