GB1518846A - Treatment of electrolysis cell membrane - Google Patents
Treatment of electrolysis cell membraneInfo
- Publication number
- GB1518846A GB1518846A GB40153/75A GB4015375A GB1518846A GB 1518846 A GB1518846 A GB 1518846A GB 40153/75 A GB40153/75 A GB 40153/75A GB 4015375 A GB4015375 A GB 4015375A GB 1518846 A GB1518846 A GB 1518846A
- Authority
- GB
- United Kingdom
- Prior art keywords
- treatment
- membrane
- deposits
- electrolysis
- cell
- 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
- C25B13/00—Diaphragms; Spacing elements
-
- 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
- C25B15/00—Operating or servicing cells
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)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
1518846 Rejuvenation of electrolysis membranes HOOKER CHEMICALS & PLASTICS CORP 1 Oct 1975 [29 Oct 1974] 40153/75 Heading C7B An ion-exchange membrane which has been used to define part of the anode compartment of an NaCl electrolysis cell is rejuvenated by treatment with acid at pH 0À2 to 2À5 and below the working electrolyte pH to remove deposits from its anodic side. The membrane may be a cation selective fluoropolymer e.g. a laminated membrane with different cation-selective activity on each side, or having an SO 3 H gradient across its thickness. Treatment may be in situ in which case normal electrolysis is modified by acidifying the anolyte, reducing the current density, and diluting the NaOH on the cathodic side. If the membrane is removed from the cell it may first be treated in a glycerol/brine solution to prevent shrinkage. The deposits removed are Ca, Mg and possibly Fe oxides, hydroxides, chlorides and complexes and should also be removed from the cell base by flushing. Entrained deposits are either filtered out or, if dissolved, chemically precipitated. Treatment acids include HCI, H 2 SO 4 , H 3 PO 4 , citric, gluconic and mixtures.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US51890374A | 1974-10-29 | 1974-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1518846A true GB1518846A (en) | 1978-07-26 |
Family
ID=24065966
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB40153/75A Expired GB1518846A (en) | 1974-10-29 | 1975-10-01 | Treatment of electrolysis cell membrane |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS5167292A (en) |
BE (1) | BE834908A (en) |
CA (1) | CA1105876A (en) |
DE (1) | DE2548456A1 (en) |
FI (1) | FI60577C (en) |
FR (1) | FR2333058A1 (en) |
GB (1) | GB1518846A (en) |
IT (1) | IT1043667B (en) |
NL (1) | NL7512519A (en) |
NO (1) | NO753618L (en) |
SE (1) | SE425323B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52149295A (en) * | 1976-06-08 | 1977-12-12 | Tokuyama Soda Co Ltd | Protecting method for electrolytic bath |
JPS5312798A (en) * | 1976-07-22 | 1978-02-04 | Tokuyama Soda Co Ltd | Electrolyzing eqiupment for aqueous solution of alkali metal salt |
-
1975
- 1975-10-01 GB GB40153/75A patent/GB1518846A/en not_active Expired
- 1975-10-14 CA CA237,733A patent/CA1105876A/en not_active Expired
- 1975-10-20 FI FI752923A patent/FI60577C/en not_active IP Right Cessation
- 1975-10-27 IT IT28703/75A patent/IT1043667B/en active
- 1975-10-27 NL NL7512519A patent/NL7512519A/en unknown
- 1975-10-27 BE BE161285A patent/BE834908A/en unknown
- 1975-10-27 FR FR7532776A patent/FR2333058A1/en not_active Withdrawn
- 1975-10-28 NO NO753618A patent/NO753618L/no unknown
- 1975-10-28 SE SE7512049A patent/SE425323B/en unknown
- 1975-10-29 JP JP50130304A patent/JPS5167292A/ja active Pending
- 1975-10-29 DE DE19752548456 patent/DE2548456A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
SE7512049L (en) | 1976-04-30 |
FI752923A (en) | 1976-04-30 |
BE834908A (en) | 1976-04-27 |
CA1105876A (en) | 1981-07-28 |
FI60577C (en) | 1982-02-10 |
IT1043667B (en) | 1980-02-29 |
JPS5167292A (en) | 1976-06-10 |
NO753618L (en) | 1976-04-30 |
NL7512519A (en) | 1976-05-04 |
DE2548456A1 (en) | 1976-05-13 |
FR2333058A1 (en) | 1977-06-24 |
FI60577B (en) | 1981-10-30 |
SE425323B (en) | 1982-09-20 |
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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 |