US3752757A - Bipolar electrode seal at barrier sheet - Google Patents

Bipolar electrode seal at barrier sheet Download PDF

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Publication number
US3752757A
US3752757A US00260395A US3752757DA US3752757A US 3752757 A US3752757 A US 3752757A US 00260395 A US00260395 A US 00260395A US 3752757D A US3752757D A US 3752757DA US 3752757 A US3752757 A US 3752757A
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US
United States
Prior art keywords
boss
anode
cathode
ring
bolt
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
US00260395A
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English (en)
Inventor
O Stephenson
J Schmidt
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BASF Corp
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BASF Wyandotte Corp
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Filing date
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Assigned to BASF CORPORATION reassignment BASF CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). Assignors: BADISCHE CORPORATION, BASF SYSTEMS CORPORATION, BASF WYANDOTTE CORPORATION, A MI CORP., GLASURIT AMERICA, INC., (MERGED INTO), INMONT CORPORATION, (CHANGED TO), LIMBACHER PAINT & COLOR WORKS, INC
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
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for

Definitions

  • This invention relates to electrolytic cells and particularly to electrolytic cells adapted for the production of chlorine and caustic, the cells being commonly known in the art as filter press variants of the diaphragm type cells.
  • a new two point sealing system is provided for bolting the adjacent cathode and anode through the barrief sheet while sealing out electrolyte through the bolt ho e.
  • a bipolar electrolytic filter press cell for the production of chlorine from aqueous alkali metal chloride solutions wherein the metal anode and metal cathode of adjoining cells are in direct electrical connection with each other by thread engaging means and said anode and cathode are maintained in spaced relationship by an electrically inactive barrier sheet between them, the improvement of independently maintaining proper electrical and mechanical connections between the anode and cathode of adjacent cells while preventing electrolyte and gas flow through the cell barrier joint between said anode and cathode comprising in combination (1) attaching on one side of, at least one boss on each said anode and said cathode, said bosses being positioned so as to mate with each other, said bosses having a composition substantially the same as the respective electrode to which it is attached and on the side of each anode and cathode boss which is in contact with said barrier sheet and surrounding the respective connecting thread engaging means of each boss an O- ring, said
  • each boss having a pressure receiving shoulder which mates with the other boss and surrounds the thread engaging means, one boss having an aperture for receiving a bolt which passes through said boss into the second (other) boss, said bolt having a composition substantially the same as the boss through which it passes, said first boss also having a pressure receiving shoulder which corresponds with and mates with the pressure receiving shoulder of said bolt, said O-rings and said pressure receiving shoulders being so positioned that when said bolt is connected through said first boss with said second boss that both of said 0- rings and pressure receiving shoulders are placed under compression at substantially the same time, yet the compression placed on said O-rings is independent of the compression placed on the metal to metal contact of the pressure receiving shoulder whereby the compression of the pressure receiving shoulder of said boss is maintained independently of the changes of compression in the O-ring due to changing physical properties of said O-ring whereby said O-ring functions as a gasket rather than as an O-ring.
  • a typical bipolar electrolytic cell for the production of chlorine and caustic is equipped with a metal anode 1, a plastic barrier sheet 2 between adjacent cells of the filter press and the metal electrode 3 of the adjacent cell.
  • an anode boss 4 is attached to the anode 1 and a corresponding cathode boss 5 is attached to the cathode 3 in such a manner that the threaded bolt hole 18 of the anode boss 4, the cathode base bolt hole 22 and the cathode 3 are in axial alignment with one another so that bolt 20 can be inserted and engaged without difficulty.
  • the mechanical and electrical connection is provided by inserting the bolt 20 through an electrode (for the purpose of illustration the bolt 20 is shown through cathode 3 although the other sequence through the anode 1 could also be employed) and its boss and into the other boss 4 threaded bolt hole 18 wherein threads of bolt 20 engage the anode boss engaging threads 11.
  • the bolt 20 is turned until tight contact is exerted by (A) the bolt head pressure receiving shoulder 9 and the cathode boss receiving pressure shoulder 10 and (B) the cathode boss pressure receiving area 12 and anode boss pressure receiving area 13.
  • the pressure receiving areas 9 and 10, 12 and 13 have been illustrated as fiat they can also be beveled or conical, the shape being secondary to the consideration of mating engagement with firm contact to provide both a strong mechanical joint and a solid electrical contact.
  • the plastic barrier sheet 2 has an aperture or hole through which a portion of one boss extends to meet in mating engagement with the other boss. However, the hole is substantially smaller than the base. It is preferred that anode boss 4 and cathode boss 5 have substantially the same radial dimensions.
  • the second major feature of the invention is its sealing aspect.
  • the plastic barrier sheet 2 is substantially clamped and mechanically locked together and between anode boss 4 and cathods boss 5 with the bolting process described above.
  • an O-ring receiving chamber 14, 16 which surrounds (preferably concentrically) the bolt hole 22, 18 and on the part of the boss which faces the other boss and would otherwise be in contact with the plastic barrier sheet 2.
  • an O-ring (6 and 6a or 7 and 7a).
  • the depth of the O-ring receiving chambers 14, 16 is about 0.5 to 0.9 of the cross-sectional diameter of the uncompressed O-ring.
  • the pressure to the O-ring 6, 7 is substantially independent of the pressure to the pressure receiving areas 9 and 10, 12 and 13 and yet they are all placed under compression at substantially the same time.
  • the O-ring changes in compression will be due to changing physical properties of the O-ring and it will have the operational characteristics of a gasket.
  • the anode 1 and anode boss can be attached by Welding, including spot welding to an anode substrate of expanded titanium mesh, if desired, and are suitably made of a valve metal or an alloy thereof.
  • valve metals it is meant metals of tungsten, titanium, zirconium, tantulum and niobium.
  • titanium or tantulum is employed and it is normally a commercially pure grade such as electrolytic grade. Alloys of titanium may be employed as long as the alloy meets the criterion of passivity, metal alloys which become passivated when polyarized anodically can remain passive well beyond the anodic potential needed to convert a chloride ion to chlorine.
  • platinum group metals include platinum, ruthenium, osmium, rhodium, iridium and palladium and alloys of two or more of the foregoing metals. It has been convenient to refer to the group as platinum since platinum is the preferred metal in the group.
  • the cathode 3 and cathode boss 4 are also suitably joined together by welding and are suitably made from a ferrous metal as is well known in the art, iron or steel being preferred.
  • the bolt is preferably made of the same or similar metal 'as the electrode through which it passes. As illustrated the bolt 20 would be made of iron or steel.
  • the O-rings 6, 7 and the plastic barrier sheet 2 can be of any of the well known materials of the prior art including but not limited to, as applicable using ordinary engineering skills, rubber, chlorinated plastics, polypropylene and polymers and copolymers of trifluorochloroethylene, tetrachloroethylene and tetrafluoroethylene sold under trade names such as Teflon and Kel-F. It will at once be obvious that the barrier sheet 2 can contain reinforcing filler, e.g. carbon black or asbestos to achieve certain structural and chemical resistant properties not required in an O-ring.
  • reinforcing filler e.g. carbon black or asbestos
  • each boss having a pressure receiving shoulder which mates with the other boss and surrounds the thread engaging means, one boss having an aperture for receiving a bolt which passes through said boss into the second (other) boss, said bolt having a composition substantially the same as the boss through which it passes, said first boss also having a pressure receiving shoulder which corresponds with and mates with the pressure receiving shoulder of said bolt, said O-rings and said pressure receiving shoulders being so positioned that when said bolt is connected through said first boss with said second boss that both of said O-rings and pressure receiving shoulders are placed under compression at substantially the same time, yet the compression placed on said O-rings is independent of the compression placed on the metal to metal contact of the pressure receiving shoulder whereby the compression of the pressure receiving shoulder of said boss is maintained independently of the changes of compression in the O-ring due to changing physical properties of said O-ring whereby said O-ring functions as a gasket rather than as an O-ring.

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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)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
US00260395A 1972-06-07 1972-06-07 Bipolar electrode seal at barrier sheet Expired - Lifetime US3752757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26039572A 1972-06-07 1972-06-07

Publications (1)

Publication Number Publication Date
US3752757A true US3752757A (en) 1973-08-14

Family

ID=22988995

Family Applications (1)

Application Number Title Priority Date Filing Date
US00260395A Expired - Lifetime US3752757A (en) 1972-06-07 1972-06-07 Bipolar electrode seal at barrier sheet

Country Status (11)

Country Link
US (1) US3752757A (enrdf_load_stackoverflow)
JP (1) JPS535880B2 (enrdf_load_stackoverflow)
BE (1) BE800601A (enrdf_load_stackoverflow)
CA (1) CA1009183A (enrdf_load_stackoverflow)
DE (1) DE2328770A1 (enrdf_load_stackoverflow)
FR (1) FR2187415B1 (enrdf_load_stackoverflow)
GB (1) GB1435129A (enrdf_load_stackoverflow)
IT (1) IT985333B (enrdf_load_stackoverflow)
NO (1) NO138152C (enrdf_load_stackoverflow)
SE (1) SE392130B (enrdf_load_stackoverflow)
ZA (1) ZA733828B (enrdf_load_stackoverflow)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873437A (en) * 1972-11-09 1975-03-25 Diamond Shamrock Corp Electrode assembly for multipolar electrolytic cells
US3970539A (en) * 1974-12-23 1976-07-20 Basf Wyandotte Corporation End connector for filter press cell
US4026782A (en) * 1974-07-29 1977-05-31 Rhone-Poulenc Industries Electrolysis cell having bipolar elements
US4064032A (en) * 1974-07-29 1977-12-20 Rhone-Poulenc Industries Electrolysis cell of modular structure and having bipolar elements
US4069130A (en) * 1975-01-29 1978-01-17 Kerr-Mcgee Chemical Corporation Bipolar electrode and method for constructing same
US4076609A (en) * 1975-01-14 1978-02-28 Societe De Recherches Techniques Et Industrielles Electrolysis apparatus
US4085027A (en) * 1975-01-29 1978-04-18 Kerr-Mcgee Chemical Corporation Hybrid bipolar electrode
US4224130A (en) * 1978-02-13 1980-09-23 The Dow Chemical Company Electrolytic diaphragm cell
US4310404A (en) * 1978-11-17 1982-01-12 Kureha Kagaku Kogyo Kabushiki Kaisha Electrolytic bath vessel elements
US4422921A (en) * 1981-08-19 1983-12-27 Basf Aktiengesellschaft Bipolar electrodes with graphite as the carrier and their production
US4488946A (en) * 1983-03-07 1984-12-18 The Dow Chemical Company Unitary central cell element for filter press electrolysis cell structure and use thereof in the electrolysis of sodium chloride
US4560452A (en) * 1983-03-07 1985-12-24 The Dow Chemical Company Unitary central cell element for depolarized, filter press electrolysis cells and process using said element
US4568434A (en) * 1983-03-07 1986-02-04 The Dow Chemical Company Unitary central cell element for filter press electrolysis cell structure employing a zero gap configuration and process utilizing said cell
US4581114A (en) * 1983-03-07 1986-04-08 The Dow Chemical Company Method of making a unitary central cell structural element for both monopolar and bipolar filter press type electrolysis cell structural units
US4604171A (en) * 1984-12-17 1986-08-05 The Dow Chemical Company Unitary central cell element for filter press, solid polymer electrolyte electrolysis cell structure and process using said structure
US4673479A (en) * 1983-03-07 1987-06-16 The Dow Chemical Company Fabricated electrochemical cell
US5013414A (en) * 1989-04-19 1991-05-07 The Dow Chemical Company Electrode structure for an electrolytic cell and electrolytic process used therein
US5484514A (en) * 1993-04-30 1996-01-16 Chlorine Engineers Corp., Ltd. Electrolyzer
US20130029194A1 (en) * 2011-07-28 2013-01-31 Zinc Air Incorporated Module for an Electrical Charge Storage Apparatus Including a Seal Layer and a Method of Making the Same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413473A (en) * 1977-02-17 1979-01-31 Kurorin Engineers Kk Double polar electrode

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3873437A (en) * 1972-11-09 1975-03-25 Diamond Shamrock Corp Electrode assembly for multipolar electrolytic cells
US4026782A (en) * 1974-07-29 1977-05-31 Rhone-Poulenc Industries Electrolysis cell having bipolar elements
US4064032A (en) * 1974-07-29 1977-12-20 Rhone-Poulenc Industries Electrolysis cell of modular structure and having bipolar elements
US3970539A (en) * 1974-12-23 1976-07-20 Basf Wyandotte Corporation End connector for filter press cell
US4076609A (en) * 1975-01-14 1978-02-28 Societe De Recherches Techniques Et Industrielles Electrolysis apparatus
US4069130A (en) * 1975-01-29 1978-01-17 Kerr-Mcgee Chemical Corporation Bipolar electrode and method for constructing same
US4085027A (en) * 1975-01-29 1978-04-18 Kerr-Mcgee Chemical Corporation Hybrid bipolar electrode
US4224130A (en) * 1978-02-13 1980-09-23 The Dow Chemical Company Electrolytic diaphragm cell
US4310404A (en) * 1978-11-17 1982-01-12 Kureha Kagaku Kogyo Kabushiki Kaisha Electrolytic bath vessel elements
US4422921A (en) * 1981-08-19 1983-12-27 Basf Aktiengesellschaft Bipolar electrodes with graphite as the carrier and their production
US4488946A (en) * 1983-03-07 1984-12-18 The Dow Chemical Company Unitary central cell element for filter press electrolysis cell structure and use thereof in the electrolysis of sodium chloride
US4560452A (en) * 1983-03-07 1985-12-24 The Dow Chemical Company Unitary central cell element for depolarized, filter press electrolysis cells and process using said element
US4568434A (en) * 1983-03-07 1986-02-04 The Dow Chemical Company Unitary central cell element for filter press electrolysis cell structure employing a zero gap configuration and process utilizing said cell
US4581114A (en) * 1983-03-07 1986-04-08 The Dow Chemical Company Method of making a unitary central cell structural element for both monopolar and bipolar filter press type electrolysis cell structural units
US4673479A (en) * 1983-03-07 1987-06-16 The Dow Chemical Company Fabricated electrochemical cell
US4604171A (en) * 1984-12-17 1986-08-05 The Dow Chemical Company Unitary central cell element for filter press, solid polymer electrolyte electrolysis cell structure and process using said structure
US5013414A (en) * 1989-04-19 1991-05-07 The Dow Chemical Company Electrode structure for an electrolytic cell and electrolytic process used therein
US5484514A (en) * 1993-04-30 1996-01-16 Chlorine Engineers Corp., Ltd. Electrolyzer
US20130029194A1 (en) * 2011-07-28 2013-01-31 Zinc Air Incorporated Module for an Electrical Charge Storage Apparatus Including a Seal Layer and a Method of Making the Same

Also Published As

Publication number Publication date
BE800601A (fr) 1973-10-01
NO138152B (no) 1978-04-03
JPS5046599A (enrdf_load_stackoverflow) 1975-04-25
CA1009183A (en) 1977-04-26
FR2187415B1 (enrdf_load_stackoverflow) 1976-11-12
ZA733828B (en) 1974-05-29
JPS535880B2 (enrdf_load_stackoverflow) 1978-03-02
NO138152C (no) 1978-07-12
SE392130B (sv) 1977-03-14
GB1435129A (en) 1976-05-12
FR2187415A1 (enrdf_load_stackoverflow) 1974-01-18
IT985333B (it) 1974-11-30
DE2328770A1 (de) 1974-01-03

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AS Assignment

Owner name: BASF CORPORATION, STATELESS

Free format text: MERGER;ASSIGNORS:BASF WYANDOTTE CORPORATION, A MI CORP.;BADISCHE CORPORATION;BASF SYSTEMS CORPORATION;AND OTHERS;REEL/FRAME:004844/0837

Effective date: 19860409

Owner name: BASF CORPORATION

Free format text: MERGER;ASSIGNORS:BASF WYANDOTTE CORPORATION, A MI CORP.;BADISCHE CORPORATION;BASF SYSTEMS CORPORATION;AND OTHERS;REEL/FRAME:004844/0837

Effective date: 19860409