US3836438A - Apparatus for the recovery of leakages of brine in the metallic bottoms of diaphragm cells - Google Patents

Apparatus for the recovery of leakages of brine in the metallic bottoms of diaphragm cells Download PDF

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Publication number
US3836438A
US3836438A US00364623A US36462373A US3836438A US 3836438 A US3836438 A US 3836438A US 00364623 A US00364623 A US 00364623A US 36462373 A US36462373 A US 36462373A US 3836438 A US3836438 A US 3836438A
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US
United States
Prior art keywords
anode
anodic
metallic
recovery
electrolyte
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Expired - Lifetime
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US00364623A
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English (en)
Inventor
B Sartre
J Pigeaud
D Masure
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Rhone Progil SA
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Rhone Progil SA
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Filing date
Publication date
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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

  • the present invention relates to an apparatus for the recovery and discharge of leakage of brine in the tails of metallic anodes, used more particularly in diaphragm or membrane cells for the electrolysis of aqueous solutions of alkali metal halides.
  • the bottoms comprising graphitic anodes, the lower part of which is fixed by a layer of lead metallic which permits supply of current to the anodes from copper bars, which copper bars are sealed in lead, the anode assembly is placed in a concrete tank. So as to effect the protection and tightness of the anodic bottom, an asphalt layer of a sufficient thickness is then poured inside this concrete bottom to cover at the same time the layer of lead and the lower part of the anodes. This prevents the electrical conductors from attack by penetration of very corrosive brines during the electrolysis process.
  • metallic anodes have replaced the use of graphite anodes, the surface of the metal anodes being covered with a coating made of precious metal.
  • the metal anode assembly is subjected to an activation treatment.
  • These metal anodes provide very good resistance to corrosion by the anolyte, they are dimensionally stable, and do not present the disadvantages of wear inherent in the graphitic anodes.
  • Such anodes present therefore advantages resulting from their chemical nature, and their utilization has allowed improvements and simplifications in the preparation and assembly of the anodic bottom of the diaphragm cells.
  • French Pat. No. 1,600,249 of Dec. 31, 1968 has claimed a kind of flat and hollow anode, with at least one of the parallel sides being constituted of a perforated sheet or a grid made of one of the metals having the anodic properties of titanium, etc., or an alloy of such a metal.
  • one or several lengthenings or extensions of the anode shafts can be used; but the use of a single length is most suitable, in that the anode shafts do not undergo the strains caused by the dilatation of the anode elements.
  • These lengthenings of the anode shafts or tails are preferably made from pieces having a cylindrical shape which allows various machinings permitting current supply to the anode shaft lengthenings.
  • the present invention is not limited to these hereinabove described improvements.
  • the present invention can be applied at any anode having a lengthening which goes through the horizontal base constituting the cell bottom.
  • the protection is inadequate of this base constituting the anodic bottom, against the corrosion by the anolyte in the openings made in this bottom, which openings have the same axis that the anode lengthenings have.
  • the tightness at this level is generally realized by a composite joint having a casing of polytetrafluoroethylene, the pressure of which is obtained by screwing the nut which serves to fix the lengthening or extension of the anode or its shaft on the anodic bottom, this nut being screwed underneath the bottom, on the threaded end of the lengthening of the anode shaft.
  • an object of the present invention to provide an apparatus for the recovery and discharge of leakages of electrolyte at every opening made in the metallic anodic bottom, including the current supply conductors.
  • the FIGURE is an elevational view of the apparatus of the invention.
  • the apparatus of the present invention for the recovery and discharge of electrolyte is characterized in that the leakage of electrolyte is first recovered in a duct made of a material inert towards the electrolyte, located around the opening made in the anodic bottom, the electrolyte is then discharged by a conduit which is made laterally through the lengthening or extension of anode, at the level of the duct, and extended downwards to the end of this lengthening, the leaking of electrolyte being finally recovered outside the cell.
  • FIGURE of drawing describes the details of a portion of anodic assembly of a diaphragm electrolysis cell.
  • a metallic anodic bottom (I) of an electrolysis cell made of a copper or aluminum bar (2) for the supply of electrical current, is coated with a thin protective sheet (3) made of titanium.
  • This bottom (1) is pierced by an opening (4) in which the lengthening or extension (5) of the anode is put, the lower part (6) of which, below and outside the bottom, is long enough to hold a nut (7).
  • the composite joint forms a duct which is cased with polytetrafluoroethylene (11) which ensures tightness between the anode lengthening or extension (5) and the metallic bottom (1) of the cell, by screwing the nut (7) located underneath this bottom, the stress of which is tensionly constant, for it is limited by flexibility of the non-corrosive metal discs (12). These discs (12) bear differential dilatations when the cell is started or stopped.
  • the dimension of the opening (4) made in the bottom of the cell is calculated in such a way that a space is provided between the copper or aluminum bar (2) of bottom (1) and the lengthening or extension (5) of the anode which is sufficient to place discs (18) with flexible conductive metal contacts (19) ensuring the electrical connection between the conducting part of the cell bottom (2) and the conducting part (8) of the lengthening of the anode.
  • the apparatus which is the object of the invention allows moreover the protection of this electrical contact towards the electrolyte.
  • Apparatus for the recovery and the discharge of leakages of electrolyte occurring on the metallic anodic bottom of a diaphragm type electrolysis cell said metallic anodic bottom being provided with openings to hold and accommodate the stems of anodes which make up the anodic portion of the cell
  • said apparatus being characterized in that an electrolyte leakage recovery duct made of a material which is inert towards the electrolyte is provided in the joint formed by the anodic bottom and the anode stem, said duct being placed around the opening made through the anodic bottom and communicating with a conduit made laterally in the anode shaft at the level of said duct, said conduit communicating downwards in the anode shaft to the outside of the metallic anodic bottom.
  • Apparatus according to claim 1 characterized in that the duct made of an inert material is comprised of polytetrafluoroethylene.
  • Apparatus according to claim 1 characterized in that electrical connection is made between the anodic bottom and the anode stems.

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)
  • Electrolytic Production Of Metals (AREA)
US00364623A 1973-02-23 1973-05-29 Apparatus for the recovery of leakages of brine in the metallic bottoms of diaphragm cells Expired - Lifetime US3836438A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7307223A FR2218941B1 (de) 1973-02-23 1973-02-23

Publications (1)

Publication Number Publication Date
US3836438A true US3836438A (en) 1974-09-17

Family

ID=9115582

Family Applications (1)

Application Number Title Priority Date Filing Date
US00364623A Expired - Lifetime US3836438A (en) 1973-02-23 1973-05-29 Apparatus for the recovery of leakages of brine in the metallic bottoms of diaphragm cells

Country Status (12)

Country Link
US (1) US3836438A (de)
JP (1) JPS49115980A (de)
AT (1) AT321953B (de)
BE (1) BE798422A (de)
BR (1) BR7306323D0 (de)
CH (1) CH567577A5 (de)
DE (1) DE2325340A1 (de)
ES (1) ES414128A1 (de)
FR (1) FR2218941B1 (de)
GB (1) GB1405610A (de)
IT (1) IT985176B (de)
NL (1) NL7307343A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040935A (en) * 1975-04-11 1977-08-09 Basf Wyandotte Corporation Protective covering for electrolytic filter press cell frames
US4045325A (en) * 1975-01-27 1977-08-30 Bayer Aktiengesellschaft Membrane seal for electrolysis plate and frame assemblies
US4121994A (en) * 1977-11-17 1978-10-24 Hooker Chemicals & Plastics Corp. Anode support means for an electrolytic cell
US4211629A (en) * 1979-02-12 1980-07-08 Diamond Shamrock Corporation Anode and base assembly for electrolytic cells
US5277776A (en) * 1990-08-09 1994-01-11 Heraeus Electrochemie Gmbh Power lead for an electrode
WO2000075401A1 (en) * 1999-06-04 2000-12-14 Mykrolis Corporation Simultaneous electrical and fluid connection for anode
US6689261B1 (en) 1999-11-08 2004-02-10 De Nora Elettrodi S.P.A. Diaphragm electrolyzer
US6695957B1 (en) 1999-06-04 2004-02-24 Mykrolis Corporation Simultaneous electrical and fluid connection for anode

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2308700A1 (fr) * 1975-04-25 1976-11-19 Solvay Assemblage anodique pour cellule d'electrolyse
DE4025253C2 (de) * 1990-08-09 1994-06-01 Heraeus Elektrochemie Stromzuleiter für eine Elektrode

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1898352A (en) * 1932-05-31 1933-02-21 Howard E Dorsey Means for electrolytic production of gases
CA868516A (en) * 1971-04-13 A. Bell John Electrolytic cells
US3591483A (en) * 1968-09-27 1971-07-06 Diamond Shamrock Corp Diaphragm-type electrolytic cells

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3290047A (en) * 1963-02-11 1966-12-06 North American Aviation Inc Relief seal with dual sealing surfaces

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA868516A (en) * 1971-04-13 A. Bell John Electrolytic cells
US1898352A (en) * 1932-05-31 1933-02-21 Howard E Dorsey Means for electrolytic production of gases
US3591483A (en) * 1968-09-27 1971-07-06 Diamond Shamrock Corp Diaphragm-type electrolytic cells

Cited By (8)

* 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
US4040935A (en) * 1975-04-11 1977-08-09 Basf Wyandotte Corporation Protective covering for electrolytic filter press cell frames
US4121994A (en) * 1977-11-17 1978-10-24 Hooker Chemicals & Plastics Corp. Anode support means for an electrolytic cell
US4211629A (en) * 1979-02-12 1980-07-08 Diamond Shamrock Corporation Anode and base assembly for electrolytic cells
US5277776A (en) * 1990-08-09 1994-01-11 Heraeus Electrochemie Gmbh Power lead for an electrode
WO2000075401A1 (en) * 1999-06-04 2000-12-14 Mykrolis Corporation Simultaneous electrical and fluid connection for anode
US6695957B1 (en) 1999-06-04 2004-02-24 Mykrolis Corporation Simultaneous electrical and fluid connection for anode
US6689261B1 (en) 1999-11-08 2004-02-10 De Nora Elettrodi S.P.A. Diaphragm electrolyzer

Also Published As

Publication number Publication date
GB1405610A (en) 1975-09-10
JPS49115980A (de) 1974-11-06
FR2218941B1 (de) 1976-11-05
BR7306323D0 (pt) 1974-11-12
DE2325340A1 (de) 1974-09-05
FR2218941A1 (de) 1974-09-20
NL7307343A (de) 1974-08-27
IT985176B (it) 1974-11-30
AT321953B (de) 1975-04-25
ES414128A1 (es) 1976-02-01
CH567577A5 (de) 1975-10-15
BE798422A (fr) 1973-10-18

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