US3915836A - HCl electrolysis frame with a graphite plate arranged therein - Google Patents

HCl electrolysis frame with a graphite plate arranged therein Download PDF

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Publication number
US3915836A
US3915836A US457737A US45773774A US3915836A US 3915836 A US3915836 A US 3915836A US 457737 A US457737 A US 457737A US 45773774 A US45773774 A US 45773774A US 3915836 A US3915836 A US 3915836A
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US
United States
Prior art keywords
frame
graphite plate
plate
electrolysis
graphite
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
US457737A
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English (en)
Inventor
Hans Born
Karl-Josef Schwickart
Edmund Urban
Wolf-Dieter Volkmann
Gunter Mohrs
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.)
Bayer AG
Original Assignee
Bayer 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
Priority claimed from DE2317359A external-priority patent/DE2317359C2/de
Priority claimed from DE2327883A external-priority patent/DE2327883C2/de
Application filed by Bayer AG filed Critical Bayer AG
Application granted granted Critical
Publication of US3915836A publication Critical patent/US3915836A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C25B9/63—Holders for electrodes; Positioning of the electrodes

Definitions

  • ABSTRACT An HCl electrolysis frame with a graphite plate arranged therein, comprising expansion joints and optionally elastic seals arranged between the electrolysis frame and graphite plate, the connection between the electrolysis frame and the graphite plate being not rigid, and releasable connecting elements serving to hold the graphite plates.
  • FIG. 4 FIG. 5
  • the invention relates to an electrolysis plate consisting of an outer, non-conducting frame of asbestosstrengthened cresol resin and of an electrically conducting graphite plate which is arranged therein.
  • Such plates are usually arranged in blocks of 30 plates thus forming a unit for the electrolysis of hydrochloric acid.
  • a direct current is conducted through the graphite plates splitting the hydrochloric acid into chlorine and hydrogen.
  • the frames consisting of asbestosstrengthened cresol or phenolic resin insulate the graphite plates both outwardly and against each other.
  • the hydrochloric acid is conducted through the frames by passing it in at the bottom and out at the top.
  • the gases forming during electrolysis H and C1 are led off through specially arranged channels.
  • electrolyzer plates were so constructed that the graphite plate and the outer frame were seperately made of asbestos-strengthened cresol resin. After completion of the mechanical work on the frame, the graphite plate was inserted and connected to the frame using a chemically stable cold curing cementing composition.
  • the object of the invention is attained by connecting the graphite plate and the frame in a new construction in such a way that no or only very slight tension is caused by strain-induced shrinkage.
  • the present invention relates to an HCl electrolysis frame with a graphite plate arranged therein, comprising expansion joints and optionally elastic seals arranged between the electrolysis frame and graphite plate, the connection between the electrolysis frame and the graphite plate being not rigid, and releasable connecting elements serving to hold the graphite plates.
  • connecting pieces there may be used, for example, screw couplings, fastening members fixed by means of screws or cement, safety rods or cementing parts.
  • FIG. la is a top view of an electrolysis unit.
  • FIGS. lb, 2, 3, 4 and 5 depict side views of the graphite plate with frame.
  • FIG. 2 One embodiment of the invention is shown in FIG. 2.
  • the graphite plate 6 arranged within the electrolysis frame 5 rests on the lower part of the frame so that the weight of the graphite plate does not put a strain on the seal 4 fitted in the gap and composed of an elastic and stable material, for example polytetrafluoroethylene, chlorosulphonated polyethylene, polypropylene, asbestos cord, carbon fluoride rubber or the like.
  • the upper gap allows movement of the frame upon shrinkage or thermal expansion. Upon shrinkage of the frame the gap becomes smaller and the elastic seal is compressed. The width of the gap is so calculated that full compensation is provided for the anticipated change in size.
  • the arrangement of the graphite plate on the side faces corresponds to the example according to FIG. 2, upper part.
  • the electrolysis frame and the graphite plate are connected with one another by means of a 3 to 5 mm thick safety strip 8 of a stable material, e.g. normal or postchlorinated polyvinyl chloride or polypropylene.
  • a stable material e.g. normal or postchlorinated polyvinyl chloride or polypropylene.
  • This safety element 8 is inserted during assembly into the groove provided in the graphite plate 6 and electrolysis frame 5.
  • the electrolysis frame 9 is sealed by an elastic O-ring 11 of a stable material.
  • the O-ring is inserted into the groove provided therefor in the graphite plate 10 which is then placed in the electrolysis frame 9.
  • the graphite plate 10 is fixed in said elelctrolysis frame by using a holding plate 12 composed of asbestos-strengthened cresol resin or glass fibre-strengthened plastic which is screwed or cemented onto the electrolysis plate from outside.
  • the graphite plate 14 is directly connected with the electrolysis frame 13 by screws of stable material, such as postchlorinated polyvinyl chloride.
  • An elastic flat seal 15 is placed between the graphite plate 14 and the electrolysis frame 13 to make a seal between the electrolysis frame 13 and the graphite plate 14. Movement between the electrolysis frame and the graphite plate is rendered possible by making the diameter of the bores for the screws 16 somewhat larger than the screw shaft. Since the screws 16 consist of a flexible plastic they can bend towards the graphite plate upon displacement of the electrolysis frame without breaking. The screw holes are sealed from the outside with a stable cement.
  • FIG. 5 shows another embodiment of the HCl electrolysis frame with a graphite plate arranged therein and elastic seals between the graphite plate and the electrolysis frame as well as releasable connecting ele ments between the electrolysis frame and the graphite plate.
  • the cementing parts are separated off from the graphite plate or electrolysis frame and from the elastic seals 19 by means of chambers 20, 21 provided with linings 21, however, can be removed again after application of the cementing parts.
  • the cementing parts 22, 23 and 24 on the graphite plate 18 and electrolysis frame 17 may consist of phenol formaldehyde resin or cresol formaldehyde resin.
  • Polyvinyl chloride, polyethylene or polypropylene may be used for the linings 20 and 21.
  • the graphite plate 18 supports itself during operation on the electrolysis frame 17, whilst there is clearance between the graphite plate and the electrolysis frame with respect to the two sides facing each other.
  • the graphite plate is likewise arrested at the upper side by the described cementing parts; however a connection is formed here between the cementing parts 23 and 24 and the graphite plate.
  • the presence of an elastic seal between the electrolysis frame and graphite plate can be advantageous but is not obligatory; a releasable connecting element, for example in the form of a cementing part arranged on the electrolysis frame or on the graphite plate can seal off the expansion joint.
  • a releasable connecting element for example in the form of a cementing part arranged on the electrolysis frame or on the graphite plate can seal off the expansion joint.
  • a sliding connection with the graphite plate in the case of a cementing part arranged on the graphite plate the connection with the electrolysis frame should accordingly not be rigid.
  • a sliding connection between the cementing part and the graphite plate or electrolysis frame can be effected by providing those places of the graphite plate or electrolysis frame which come into contact with the cement with a thin protection coating.
  • the invention enables the graphite plate to be easily dismantled. Using a cutting device, which is guided in a groove 25 running around the electrolysis frame, the cementing parts can be cut off so that the graphite plate can easily be removed from the electrolysis frame.
  • an HCl-electrolysis plate and frame assembly comprising a frame, a graphite plate in said frame, re leasable connecting elements holding said plate in said frame, and non-rigid connectors between said plate and frame permitting expansion of the plate and relative movement between the plate and frame, the improvement comprising cementing parts on the graphite plate or on the electrolysis frame which are separated from the non-rigid connectors and the electrolysis frame or the graphite plate by chambers partly provided with linings or are separated from the electrolysis frame or the graphite plate by a thin protective coating and said frame is provided with a groove to guide a device for cutting off said cementing parts when it is desired to remove the plate from the frame.

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)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Sealing Material Composition (AREA)
US457737A 1973-04-06 1974-04-04 HCl electrolysis frame with a graphite plate arranged therein Expired - Lifetime US3915836A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2317359A DE2317359C2 (de) 1973-04-06 1973-04-06 Vorrichtung zur Elektrolyse von Salzsäure
DE2327883A DE2327883C2 (de) 1973-06-01 1973-06-01 Vorrichtung zur Elektrolyse von Salzsäure

Publications (1)

Publication Number Publication Date
US3915836A true US3915836A (en) 1975-10-28

Family

ID=25764931

Family Applications (1)

Application Number Title Priority Date Filing Date
US457737A Expired - Lifetime US3915836A (en) 1973-04-06 1974-04-04 HCl electrolysis frame with a graphite plate arranged therein

Country Status (10)

Country Link
US (1) US3915836A (cs)
JP (1) JPS5747274B2 (cs)
BR (1) BR7402749D0 (cs)
CS (1) CS184763B2 (cs)
DD (1) DD112907A5 (cs)
ES (1) ES425032A1 (cs)
FR (1) FR2224208B1 (cs)
GB (1) GB1423107A (cs)
IT (1) IT1004132B (cs)
NL (1) NL186971C (cs)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045325A (en) * 1975-01-27 1977-08-30 Bayer Aktiengesellschaft Membrane seal for electrolysis plate and frame assemblies
US4203821A (en) * 1977-09-01 1980-05-20 Hoechst Aktiengesellschaft Apparatus for carrying out electrochemical reactions and correspondingly suitable bipolar electrodes
US4236983A (en) * 1978-04-14 1980-12-02 Bayer Aktiengesellschaft Process and apparatus for electrolysis of hydrochloric acid
US6395155B1 (en) * 1999-11-25 2002-05-28 Bayer Aktiengesellschaft Electrolysis plate
US10283787B2 (en) 2013-06-10 2019-05-07 Carl Freudenberg Kg Sealing frame for a redox-flow battery electrode module
US20230332305A1 (en) * 2020-09-08 2023-10-19 Versum Materials Us, Llc Electrode attachment assembly, cell and method of use

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3810085A1 (de) * 1988-03-25 1989-10-12 Kuesters Eduard Maschf Reinigungsvorrichtung fuer eine walze
DE102012013832A1 (de) * 2012-07-13 2014-01-16 Uhdenora S.P.A. Isolierrahmen mit Eckenkompensatoren für Elektrolysezellen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2390591A (en) * 1941-11-08 1945-12-11 Nat Carbon Co Inc Electrolytic method for producing oxygen
US2682505A (en) * 1949-11-03 1954-06-29 Montedison Spa Electrode assembly for bipolar electrolyzers
US3242065A (en) * 1960-12-21 1966-03-22 Oronzio De Nora Impianti Cell for electrolysis of hydrochloric acid
US3477939A (en) * 1967-03-07 1969-11-11 Dryden Chem Ltd Bipolar electrolytic cell
US3778362A (en) * 1967-06-27 1973-12-11 Bayer Ag Electrolytic apparatus including bipolar electrodes defining an enclosed volume and held in a nonconductive frame

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB425703A (en) * 1933-10-20 1935-03-20 David Johnson Evans Improvements in or relating to electrolytic cells
US3287251A (en) * 1962-04-02 1966-11-22 Horne Bi-polar electrochemical cell

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2390591A (en) * 1941-11-08 1945-12-11 Nat Carbon Co Inc Electrolytic method for producing oxygen
US2682505A (en) * 1949-11-03 1954-06-29 Montedison Spa Electrode assembly for bipolar electrolyzers
US3242065A (en) * 1960-12-21 1966-03-22 Oronzio De Nora Impianti Cell for electrolysis of hydrochloric acid
US3477939A (en) * 1967-03-07 1969-11-11 Dryden Chem Ltd Bipolar electrolytic cell
US3778362A (en) * 1967-06-27 1973-12-11 Bayer Ag Electrolytic apparatus including bipolar electrodes defining an enclosed volume and held in a nonconductive frame

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4045325A (en) * 1975-01-27 1977-08-30 Bayer Aktiengesellschaft Membrane seal for electrolysis plate and frame assemblies
US4203821A (en) * 1977-09-01 1980-05-20 Hoechst Aktiengesellschaft Apparatus for carrying out electrochemical reactions and correspondingly suitable bipolar electrodes
US4236983A (en) * 1978-04-14 1980-12-02 Bayer Aktiengesellschaft Process and apparatus for electrolysis of hydrochloric acid
US6395155B1 (en) * 1999-11-25 2002-05-28 Bayer Aktiengesellschaft Electrolysis plate
US10283787B2 (en) 2013-06-10 2019-05-07 Carl Freudenberg Kg Sealing frame for a redox-flow battery electrode module
US20230332305A1 (en) * 2020-09-08 2023-10-19 Versum Materials Us, Llc Electrode attachment assembly, cell and method of use

Also Published As

Publication number Publication date
IT1004132B (it) 1976-07-10
ES425032A1 (es) 1976-11-01
FR2224208A1 (cs) 1974-10-31
JPS5068994A (cs) 1975-06-09
CS184763B2 (en) 1978-09-15
GB1423107A (en) 1976-01-28
NL186971B (nl) 1990-11-16
BR7402749D0 (pt) 1974-11-05
FR2224208B1 (cs) 1978-06-02
DD112907A5 (cs) 1975-05-12
JPS5747274B2 (cs) 1982-10-08
NL186971C (nl) 1991-04-16
NL7404715A (cs) 1974-10-08

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