GB1445903A - Bipolar electrolyzers - Google Patents
Bipolar electrolyzersInfo
- Publication number
- GB1445903A GB1445903A GB3205574A GB3205574A GB1445903A GB 1445903 A GB1445903 A GB 1445903A GB 3205574 A GB3205574 A GB 3205574A GB 3205574 A GB3205574 A GB 3205574A GB 1445903 A GB1445903 A GB 1445903A
- Authority
- GB
- United Kingdom
- Prior art keywords
- backplate
- crevice
- catholyte
- extending
- anodic
- 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
Links
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
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
- C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
-
- 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
- C25B9/70—Assemblies comprising two or more cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
1445903 Bi-polar electrolytic cells PPG INDUSTRIES Inc 19 July 1974 [20 July 1973] 32055/74 Heading C7B A bi-polar electrolyzer has a plurality of diaphragm cells electrically and mechanically connected in series for brine electrolysis to yield caustic soda and chlorine, formed by bi-polar units 11 each comprising: a peripheral wall 21 with flanges 23, 25 at each end and a backplate 31 inside, combining an anolyte chamber 43 fabricated of, preferably clad with, an anolyte-resistant material 27, e.g. a film-forming metal such as Ti, Zr, Hf, V, Nb, Ta, W, or alloy thereof and a catholyte chamber 57 fabricated of a catholyte-resistant material; anodes 41 e.g. extending from the anodic side 33 of the backplate; cathodes 51 e.g. including fingers 53 and backscreen 55 extending from the cathodic side 35 of the backplate; a diaphragm (not shown) mounted on the cathodes which separates the chambers; a joint 61 with gasket 71 between the respective anolyte and catholyteresistant materials of the peripheral walls having a crevice formed within in which corrosion is reduced by maintaining the surface of the anolyteresistant material within the crevice anodic, e.g. by maintaining the surface at a potential 2 to 4 volts which is between its passivation and anodic breakdown potential; preferably the cathode is in contact with the catholyte-resistant material within the crevice by extending therein. Chlorine and hydrogen recovered from chambers 43, 57 are vented respectively through pipes 19, 17. The Ti cladding in the joint may contain 2% Ni or be coated with Ta.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US381114A US3876517A (en) | 1973-07-20 | 1973-07-20 | Reduction of crevice corrosion in bipolar chlorine diaphragm cells by locating the cathode screen at the crevice and maintaining the titanium within the crevice anodic |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1445903A true GB1445903A (en) | 1976-08-11 |
Family
ID=23503724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3205574A Expired GB1445903A (en) | 1973-07-20 | 1974-06-19 | Bipolar electrolyzers |
Country Status (9)
Country | Link |
---|---|
US (1) | US3876517A (en) |
JP (1) | JPS5044179A (en) |
BE (1) | BE817867A (en) |
CA (1) | CA1026711A (en) |
DE (1) | DE2434353C3 (en) |
FR (1) | FR2237982B1 (en) |
GB (1) | GB1445903A (en) |
IT (1) | IT1016641B (en) |
NO (1) | NO139094C (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4111779A (en) * | 1974-10-09 | 1978-09-05 | Asahi Kasei Kogyo Kabushiki Kaisha | Bipolar system electrolytic cell |
US4033848A (en) * | 1975-10-15 | 1977-07-05 | Diamond Shamrock Corporation | Wafer electrode for an electrolytic cell |
US4057473A (en) * | 1976-03-15 | 1977-11-08 | Ppg Industries, Inc. | Method of reducing cell liquor header corrosion |
FR2367125A1 (en) * | 1976-10-11 | 1978-05-05 | Solvay | Bipolar electrolysis cell - with chamber suspended from a supporting beam to avoid corrosion problems |
DE2816152C2 (en) * | 1978-04-14 | 1980-07-03 | Bayer Ag, 5090 Leverkusen | Process for the production of chlorine from hydrochloric acid by electrolysis and hydrochloric acid electrolysis cell |
US4285787A (en) * | 1980-03-20 | 1981-08-25 | Pulp And Paper Research Institute Of Canada | Electrochemical corrosion protection of stainless steel bleach plant washers |
US4448663A (en) * | 1982-07-06 | 1984-05-15 | The Dow Chemical Company | Double L-shaped electrode for brine electrolysis cell |
WO1997012078A1 (en) * | 1995-09-25 | 1997-04-03 | Rmg Services Pty. Ltd. | Electrochemical system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA625003A (en) * | 1957-07-17 | 1961-08-01 | B. Cotton Joseph | Electrodes and uses thereof |
BE569804A (en) * | 1957-07-26 | |||
ZA703723B (en) * | 1969-06-24 | 1972-01-26 | Ppg Industries Inc | Diaphragm cell |
US3755108A (en) * | 1971-08-12 | 1973-08-28 | Ppg Industries Inc | Method of producing uniform anolyte heads in the individual cells of a bipolar electrolyzer |
-
1973
- 1973-07-20 US US381114A patent/US3876517A/en not_active Expired - Lifetime
-
1974
- 1974-06-19 GB GB3205574A patent/GB1445903A/en not_active Expired
- 1974-06-24 CA CA203,182A patent/CA1026711A/en not_active Expired
- 1974-07-17 DE DE2434353A patent/DE2434353C3/en not_active Expired
- 1974-07-17 NO NO742613A patent/NO139094C/en unknown
- 1974-07-19 IT IT69307/74A patent/IT1016641B/en active
- 1974-07-19 BE BE146748A patent/BE817867A/en not_active IP Right Cessation
- 1974-07-19 FR FR7425240A patent/FR2237982B1/fr not_active Expired
- 1974-07-19 JP JP49083148A patent/JPS5044179A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS5044179A (en) | 1975-04-21 |
CA1026711A (en) | 1978-02-21 |
IT1016641B (en) | 1977-06-20 |
BE817867A (en) | 1975-01-20 |
AU7057174A (en) | 1976-01-08 |
NO742613L (en) | 1975-02-17 |
FR2237982A1 (en) | 1975-02-14 |
DE2434353C3 (en) | 1984-10-11 |
NO139094C (en) | 1979-01-10 |
NO139094B (en) | 1978-09-25 |
FR2237982B1 (en) | 1977-03-18 |
US3876517A (en) | 1975-04-08 |
DE2434353B2 (en) | 1977-09-01 |
DE2434353A1 (en) | 1975-02-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |