GB1498733A - Diaphragms for electrolytic cells - Google Patents
Diaphragms for electrolytic cellsInfo
- Publication number
- GB1498733A GB1498733A GB21594/75A GB2159475A GB1498733A GB 1498733 A GB1498733 A GB 1498733A GB 21594/75 A GB21594/75 A GB 21594/75A GB 2159475 A GB2159475 A GB 2159475A GB 1498733 A GB1498733 A GB 1498733A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- asbestos
- slurry
- polymer
- coated
- 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
- C25B13/04—Diaphragms; Spacing elements characterised by the material
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)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Electrolytic Production Of Metals (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
1498733 Asbestos coated cathode HOOKER CHEMICALS & PLASTICS CORP 20 May 1975 [9 April 1975] 21594/75 Heading C7B [Also in Division B2] A diaphragm-coated cathode for an electrolytic cell, comprising a foraminous cathode bearing on the cathodically active surfaces thereof an adherent and coherent dimensionally stable diaphragm consisting essentially of asbestos fibres bound together with a discontinuous polymer coating, the concentration of polymer decreasing from the outer surface of the diaphragm to the cathode-diaphragm interface, is produced by placing a foraminous cathode member in a slurry of asbestos fibres and drawing a layer of asbestos on to the cathode by suction through the cathode, removing the coated cathode from the slurry while maintaining suction to abstract slurry liquid from the asbestos layer, placing the coated cathode in a slurry of thermoplastic polymer particles ranging in size between 0À2 and 100 microns, drawing polymer particles into the asbestos layer by suction through the coated cathode, removing the cathode from the polymer slurry and heating it to a temperature sufficient to soften the polymer particles and thus join adjacent asbestos fibres together, and then cooling the coated cathode. The cathode member may be in the form of a can or box of wire mesh, foraminous sheet metal, expanded metal or woven metal. The asbestos slurry may be in water or solutions of brine or other cell liquor, and suitably is applied at a thickness of 25-125 mms, i.e. 0À18-0À3, preferably 0À22-0À26 pounds per square foot. Preferred polymers are fluorine-containing polymers having a softening point between 105C and 400C, e.g. polytetrafluoroethylene, polyhexafluoropropylene, polychlorotrifluoroethylene, polyvinylidene fluoride, alone or as copolymers with each other or with ethylene vinyl chloride or other hydrocarbon monomers. The preferred polymer is polyvinylidene fluoride or a 1:1 copolymer of ethylene and chlorotrifluoroethylene. The polymer slurry may contain a wetting agent, preferably non-ionic, and is drawn into the asbestos layer until a polymer concentration of 1-20% of the weight of asbestos is reached. The coated cathodes may be used in chlor-alkali cells for electrolysis of brine.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US56648875A | 1975-04-09 | 1975-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1498733A true GB1498733A (en) | 1978-01-25 |
Family
ID=24263101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21594/75A Expired GB1498733A (en) | 1975-04-09 | 1975-05-20 | Diaphragms for electrolytic cells |
Country Status (16)
Country | Link |
---|---|
AR (1) | AR206735A1 (en) |
BE (1) | BE837147A (en) |
BR (1) | BR7508343A (en) |
CA (1) | CA1027898A (en) |
DE (1) | DE2523508A1 (en) |
ES (1) | ES442372A1 (en) |
FI (1) | FI61920C (en) |
FR (1) | FR2307057A1 (en) |
GB (1) | GB1498733A (en) |
IT (1) | IT1058681B (en) |
MX (1) | MX3129E (en) |
NL (1) | NL7603620A (en) |
NO (1) | NO148342C (en) |
PL (1) | PL98613B1 (en) |
SE (1) | SE7507524L (en) |
ZA (1) | ZA753784B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0048617A1 (en) * | 1980-09-22 | 1982-03-31 | Eltech Systems Corporation | Improved dimensionally stable asbestos-polytetrafluoroethylene diaphragms for chlor-alkali electrolytic cells |
US4447566A (en) * | 1983-01-27 | 1984-05-08 | Eltech Systems Corp. | Modified liquid permeable asbestos diaphragms with improved dimensional stability |
GB2149565A (en) * | 1983-11-02 | 1985-06-12 | Raychem Ltd | Protected metal components |
US4665120A (en) * | 1983-01-27 | 1987-05-12 | Eltech Systems Corporation | Modified liquid permeable asbestos diaphragms with improved dimensional stability |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4186065A (en) * | 1978-04-27 | 1980-01-29 | Ppg Industries, Inc. | Method of preparing a resin-containing asbestos diaphragm |
DE3144372A1 (en) * | 1981-11-07 | 1983-05-19 | Chemische Werke Hüls AG, 4370 Marl | METHOD FOR PRODUCING A DIAPHRAGM FOR ELECTROLYSIS CELLS |
US4741813A (en) * | 1986-12-15 | 1988-05-03 | Oxytech Systems, Inc. | Diaphragm for an electrolytic cell |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4832515B1 (en) * | 1970-08-13 | 1973-10-06 |
-
1975
- 1975-01-01 AR AR261239A patent/AR206735A1/en active
- 1975-04-24 CA CA225,379A patent/CA1027898A/en not_active Expired
- 1975-05-20 GB GB21594/75A patent/GB1498733A/en not_active Expired
- 1975-05-27 DE DE19752523508 patent/DE2523508A1/en not_active Withdrawn
- 1975-05-27 PL PL1975180711A patent/PL98613B1/en unknown
- 1975-06-02 FI FI751624A patent/FI61920C/en not_active IP Right Cessation
- 1975-06-12 ZA ZA00753784A patent/ZA753784B/en unknown
- 1975-07-01 SE SE7507524A patent/SE7507524L/en not_active Application Discontinuation
- 1975-11-03 MX MX100125U patent/MX3129E/en unknown
- 1975-11-05 ES ES442372A patent/ES442372A1/en not_active Expired
- 1975-11-07 NO NO753734A patent/NO148342C/en unknown
- 1975-12-16 BR BR7508343*A patent/BR7508343A/en unknown
- 1975-12-26 FR FR7539816A patent/FR2307057A1/en active Granted
- 1975-12-29 BE BE163173A patent/BE837147A/en unknown
-
1976
- 1976-03-29 IT IT21671/76A patent/IT1058681B/en active
- 1976-04-07 NL NL7603620A patent/NL7603620A/en unknown
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0048617A1 (en) * | 1980-09-22 | 1982-03-31 | Eltech Systems Corporation | Improved dimensionally stable asbestos-polytetrafluoroethylene diaphragms for chlor-alkali electrolytic cells |
US4447566A (en) * | 1983-01-27 | 1984-05-08 | Eltech Systems Corp. | Modified liquid permeable asbestos diaphragms with improved dimensional stability |
US4665120A (en) * | 1983-01-27 | 1987-05-12 | Eltech Systems Corporation | Modified liquid permeable asbestos diaphragms with improved dimensional stability |
GB2149565A (en) * | 1983-11-02 | 1985-06-12 | Raychem Ltd | Protected metal components |
US4615961A (en) * | 1983-11-02 | 1986-10-07 | Raychem Corporation | Protected metal components |
Also Published As
Publication number | Publication date |
---|---|
SE7507524L (en) | 1976-10-10 |
FI61920B (en) | 1982-06-30 |
ZA753784B (en) | 1976-05-26 |
AR206735A1 (en) | 1976-08-13 |
NO148342B (en) | 1983-06-13 |
IT1058681B (en) | 1982-05-10 |
NL7603620A (en) | 1976-10-12 |
ES442372A1 (en) | 1977-04-16 |
MX3129E (en) | 1980-04-28 |
FI61920C (en) | 1982-10-11 |
FR2307057B1 (en) | 1979-04-20 |
NO148342C (en) | 1983-09-21 |
PL98613B1 (en) | 1978-05-31 |
FI751624A (en) | 1976-10-10 |
BE837147A (en) | 1976-06-29 |
NO753734L (en) | 1976-10-12 |
AU8075175A (en) | 1976-11-04 |
DE2523508A1 (en) | 1976-10-21 |
BR7508343A (en) | 1977-09-27 |
CA1027898A (en) | 1978-03-14 |
FR2307057A1 (en) | 1976-11-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |