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 PDFInfo
- 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
- Authority
- US
- United States
- Prior art keywords
- anode
- anodic
- metallic
- recovery
- electrolyte
- 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
Links
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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
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7307223A FR2218941B1 (it) | 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 (it) |
JP (1) | JPS49115980A (it) |
AT (1) | AT321953B (it) |
BE (1) | BE798422A (it) |
BR (1) | BR7306323D0 (it) |
CH (1) | CH567577A5 (it) |
DE (1) | DE2325340A1 (it) |
ES (1) | ES414128A1 (it) |
FR (1) | FR2218941B1 (it) |
GB (1) | GB1405610A (it) |
IT (1) | IT985176B (it) |
NL (1) | NL7307343A (it) |
Cited By (8)
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)
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)
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)
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 |
-
1973
- 1973-02-23 FR FR7307223A patent/FR2218941B1/fr not_active Expired
- 1973-04-18 BE BE130185A patent/BE798422A/xx unknown
- 1973-04-20 AT AT356573A patent/AT321953B/de not_active IP Right Cessation
- 1973-04-27 ES ES414128A patent/ES414128A1/es not_active Expired
- 1973-04-30 CH CH613073A patent/CH567577A5/xx not_active IP Right Cessation
- 1973-05-17 IT IT50015/73A patent/IT985176B/it active
- 1973-05-18 DE DE2325340A patent/DE2325340A1/de active Pending
- 1973-05-22 GB GB2447173A patent/GB1405610A/en not_active Expired
- 1973-05-25 NL NL7307343A patent/NL7307343A/xx not_active Application Discontinuation
- 1973-05-29 US US00364623A patent/US3836438A/en not_active Expired - Lifetime
- 1973-05-31 JP JP48060402A patent/JPS49115980A/ja active Pending
- 1973-08-16 BR BR6323/73A patent/BR7306323D0/pt unknown
Patent Citations (3)
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)
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 |
---|---|
BE798422A (fr) | 1973-10-18 |
BR7306323D0 (pt) | 1974-11-12 |
NL7307343A (it) | 1974-08-27 |
JPS49115980A (it) | 1974-11-06 |
FR2218941B1 (it) | 1976-11-05 |
GB1405610A (en) | 1975-09-10 |
CH567577A5 (it) | 1975-10-15 |
FR2218941A1 (it) | 1974-09-20 |
ES414128A1 (es) | 1976-02-01 |
AT321953B (de) | 1975-04-25 |
IT985176B (it) | 1974-11-30 |
DE2325340A1 (de) | 1974-09-05 |
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