EP0045147A2
Expired / Lapsed
EP
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Process for producing a membrane for electrolysis
Assignee: AGC Inc
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Filing: 1981-07-10
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Granted: —
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Expires: 2001-07-10
Abstract
Abstract An ion exchange membrane for an electrolysis is produced by forming a removable thin layer on a surface of a perforated electrode; forming a layer of a thermoplastic fluorinated polymer having ion exchange groups or functional groups convertible to ion exchange groups on said removable thin layer; converting said layer of a thermoplastic fluorinated polymer into a liquid impermeable membrane; and removing said removable thin layer, and if necessary, converting said functional groups into ion exchange groups.
Inventors
- 👤 Manabu Suhara
- 👤 Tomoki Gunjima
- 👤 Haruhisa Miyake
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 19:32
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; C25; C25B; C25B13/00; C25B9/00; C25B9/17; C25B9/19; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
1) A process for producing an ion exchange membrane for an electrolysis which comprises forming a removable thin layer on a surface of a perforated electrode; forming a layer of a thermoplastic fluorinated polymer having ion exchange groups or functional groups convertible to ion exchange groups on said removable thin layer; converting said layer of a thermoplastic fluorinated polymer into a liquid impermeable membrane; and removing said removable thin layer, and if necessary, converting said functional groups into ion exchange groups.
Claim 2
Dependent Claim
81 words
1) A process for producing an ion exchange membrane for an electrolysis which comprises forming a removable thin layer on a surface of a perforated electrode; forming a layer of a thermoplastic fluorinated polymer having ion exchange groups or functional groups convertible to ion exchange groups on said removable thin layer; converting said layer of a thermoplastic fluorinated polymer into a liquid impermeable membrane; and removing said removable thin layer, and if necessary, converting said functional groups into ion exchange groups.
Claim 3
Dependent Claim
41 words
2) The process according to Claim 1 wherein said removable thin layer is made of a polymer and said thin layer of said polymer is removed by treating with an aqueous solution of an alkali metal hydroxide or an organic solvent.
Claim 4
Dependent Claim
39 words
3) The process according to Claim 1 wherein said removable thin layer is made of an inorganic fiber and said thin layer of said inorganic fiber is removed by treating with an aqueous solution of an alkali metal hydroxide.
Claim 5
Dependent Claim
38 words
4) The process according to Claim 1 wherein said removable thin layer is made of a metal and said thin layer of said metal is removed by treating with an aqueous solution of an acid or a base.
Claim 6
Dependent Claim
55 words
5) The process according to Claim 1 wherein said thermoplastic fluorinated polymer having ion exchange groups or functional groups convertible to ion exchange groups is used in a form of an aqueous dispersion of said fluorinated polymer which is converted into an organic medium dispersion by replacing said aqueous solution to a hydrophilic organic medium.
Claim 7
Dependent Claim
28 words
6) The process according to Claim 1 or 5 wherein said fluorinated polymer layer is converted into a liquid impermeable membrane by heating it at 40 to 160°C.
Claim 8
Dependent Claim
32 words
7) The process according to Claim 5 wherein a liquid permeability of said liquid impermeable membrane is upto 0.3 cc/cm 2 . minute under a pressure difference of 100 cmH 2 0.
References Cited (Backward Citations)
No citation records indexed.
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