• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ELECTROLYTIC CELL FOR CHLORESHINE ELECTROLYSIS a layer on the surface is a perfluorinated carboxyl-containing copolymer, characterized in that, in order to increase the durability of the electrolytic cell, the perfluorinated carboxyl-containing copolymer is oh gydrolizo- vanny copolymer of perfluoro-methyl
    公开号:SU1165239A3
    申请号:SU782605603
    申请日:1978-04-19
    公开日:1985-06-30
    发明作者:Чарльз Инглэнд Дэвид；Рафаэль Резник Пол
    申请人:Е.И.Дюпон Де Немур Энд Компани (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the technology of obtaining ion-exchange membranes and can be used in the electrochemical industry, in particular in electrolytic processes for the preparation of alkali and chlorine. Perfluorinated ion-exchange polymers are widely used as material for diaphragms of electrolytic cells for chlor-alkali electrolysis. The advantage of these polymers is their high chemical resistance to aggressive media. A known electrolytic cell for chlor-alkali electrolysis, in which the perforated polymer with sulfonamide or sulfonate groups ij serves as the material for the diaphragm. The use of this membrane in the electrolysis process allows an efficiency of 93-96% to be achieved. However, during operation, the properties of the membrane deteriorate rapidly, resulting in a sharp decrease in efficiency until the current. The electrolytic cell for chlor-alkali electrolysis is closest to the proposed one, containing a housing with anodic and cathodic regions separated by a diaphragm made from a hisi multilayer membrane. At least one layer is formed by a perfluorinated ion exchange copolymer with side groups -CFjCFjSO M, where M is a sodium or potassium atom, and one layer on the surface is perfluoro-dispersed copolymer with OCFjCOOM groups When using known ki in the process of producing halogen, the current efficiency is 93-97%, with an alkali concentration in the cathode space of up to 40%. A disadvantage of the known electrolytic cell is its fragility due to the low mechanical strength of the membrane. The purpose of the invention is to increase the durability of the electrolytic cell. To achieve the goal in an electrolytic cell for chlor-alkali electrolysis, there is a body having an anode and cathode areas separated by a diaphragm filled from a multi-layer membrane, in which 92 at least one layer is formed by a perfluorinated ion-exchange copolymeter with side groups -SRGSR ZODM, where M is M-SRCPR ZODM, where M is M-X-ray. or K, and one layer on the surface - perfluorinated " 1 carboxyl-containing copolymer, the perfluorinated carboxyl-containing copolymer is a hydrolyzed methyl perfluoro- (4,7-dioxa-5-me) copolymer yl-8-nonenoata) and tetrafluoroethylene containing OCFjCFgCOOM groups, where M - Na or K having an equivalent weight of 900-1100. The copolymers according to the invention can be obtained by copolymerizing a mixture of the corresponding monomers, specifically by copolymerizing perfluoro-4,7-dioxane-5-methyl-8-nonenoic acid methyl ester and tetrafluoroethylene to form a carboxyl-containing copolymer and copolymerizing perfluoro-3,6-dioxa-4-methyl -7- octane-sulfonyl fluoride and tetrafluoroethylene to form a sulfopolymer. When using the copolymer films of the invention as diaphragms of an electrolytic cell, it is necessary that the equivalent weight (EV) of the carboxyl copolymer does not exceed 1500. An increase in EV leads to an increase in membrane resistance and a deterioration in the performance properties of the cell. Copolyme (ry according to the invention can be obtained by known methods of polymerization, in particular radical polymerization in the presence of free radical initiators of the type in a fluorinated solvent or water. Membranes based on these copolymers are multilayer film structures with a thickness of 0.050, 5 mm Example t. A film of a copolymer of tetrafluoroethylene and perfluoro-3,6-diox-4-methyl-7-octenesulfonyl fluoride, having an EV of 1100, is 0.127 mm thick, placed in a press and coated with one surface 1 g of powder copolymer and tetrafluoroethylene and methyl perfluoro-4,7-dioxa-5-methyl-8-nonenoic acid with EV 900. The material is kept for 4 minutes at no pressure and 2 minutes at a pressure of 2120 kgf / cm. The resulting membrane is treated
    权利要求:
    Claims (1)
    [1]
    ELECTROLYTIC CELL FOR CHLOROCHALIC ELECTROLYSIS, comprising a housing having anode and cathode sections separated by a diaphragm made of a multilayer membrane in which at least one layer is formed by a perfluorinated ion-exchange copolymer with side groups CF 2 CF 2 S0 3 M, where M is Na or K, and one layer on the surface of a perfluorinated carboxy-containing copolymer, characterized in that, in order to increase the durability of the electrolytic cell, the perfluorinated carboxy-containing copolymer is g drolizovanny copolymer of methyl perfluoro (4,7-dioxa-5-methyl-8-nonenoata) and tetrafluoroethylene containing Group &
    OCF 2 CF 2 COOM, where M is Na or K, with an equivalent weight of 900-1100.
    1 165239
    类似技术:
    公开号 | 公开日 | 专利标题
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    US4123336A|1978-10-31|Process for electrolysis of aqueous alkali metal halide solution
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    US4478695A|1984-10-23|Sulfonic acid electrolytic cell membranes and use thereof in the electrolysis of sodium chloride
    SU1106448A3|1984-07-30|Method of obtaining chlorine and alkali
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    SU1165239A3|1985-06-30|Electrolytic cell for chloralkali electrolysis
    US4341605A|1982-07-27|Process for cation permeable membrane with reinforcement fabric embedded therein and product thereof
    US4602045A|1986-07-22|Cation-exchange resins and use as membranes in electrolytic cells
    WO2003106515A1|2003-12-24|Fluorinated monomer having sulfonate functional group, fluorinated copolymer therefrom and ion exchange membrane
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    US4487668A|1984-12-11|Fluorinated ion exchange polymer containing carboxylic groups, and film and membrane thereof
    US4144227A|1979-03-13|Novel copolymers and diaphragms made therefrom
    SU1729295A3|1992-04-23|Method of preparing fluorine-containing copolymer for ion- exchange membranes synthesis
    SU1494869A3|1989-07-15|Method of producing fluorinated cation-exchange membrane
    US4060473A|1977-11-29|Novel copolymers and diaphragms made therefrom
    JPH0978280A|1997-03-25|Cation exchange membrane for electrolysis and production of high purity potassium hydroxide
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    同族专利:
    公开号 | 公开日
    CA1133425A|1982-10-12|
    IL54540A|1981-09-13|
    MX151031A|1984-09-12|
    AU3516478A|1979-10-25|
    NZ187023A|1980-11-28|
    IT7822494D0|1978-04-19|
    JPS6356257B2|1988-11-07|
    DE2817344C2|1990-11-15|
    JPS53132089A|1978-11-17|
    FR2388012A1|1978-11-17|
    DE2817344A1|1978-10-26|
    BR7802433A|1979-01-16|
    BE866121A|1978-10-19|
    AU1304888A|1988-06-16|
    IL54540D0|1978-07-31|
    JPS59211583A|1984-11-30|
    IT1094102B|1985-07-26|
    ZA782225B|1979-04-25|
    GB1604102A|1981-12-02|
    NL7804221A|1978-10-24|
    AU525335B2|1982-11-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3282875A|1964-07-22|1966-11-01|Du Pont|Fluorocarbon vinyl ether polymers|
    FR1527816A|1966-02-16|1968-06-07|Du Pont|Perfluorinated alkyl-vinyl ethers bearing substituents, preparation of these ethers by pyrolysis of the corresponding salts, and their use as components of copolymers|
    US3784399A|1971-09-08|1974-01-08|Du Pont|Films of fluorinated polymer containing sulfonyl groups with one surface in the sulfonamide or sulfonamide salt form and a process for preparing such|
    US3849243A|1971-11-08|1974-11-19|Du Pont|Laminates of support material and fluorinated polymer containing pendant side chains containing sulfonyl groups|
    AU464313B2|1971-12-27|1975-08-21|Hooker Chemicals And Plastics Coup|Electrolysis method and apparatus|
    JPS551351B2|1974-03-07|1980-01-12|
    JPS5618605B2|1975-07-09|1981-04-30|
    JPS623164B2|1975-08-15|1987-01-23|Asahi Glass Co Ltd|
    JPS534114B2|1975-08-29|1978-02-14|
    GB1518387A|1975-08-29|1978-07-19|Asahi Glass Co Ltd|Fluorinated cation exchange membrane and use thereof in electrolysis of an alkali metal halide|
    JPS534113B2|1975-08-29|1978-02-14|
    JPS52120999A|1976-04-05|1977-10-11|Asahi Chem Ind Co Ltd|Electrolysis of alkali metal halides|DE3050931C2|1979-05-31|1994-06-09|Asahi Chemical Ind|Fluorinated carboxylic acid derivatives and process for their preparation|
    US4329434A|1979-05-31|1982-05-11|Asahi Kasei Kogyo Kabushiki Kaisha|Novel fluorinated cation exchange membrane and process for producing the same|
    US4329435A|1979-05-31|1982-05-11|Asahi Kasei Kogyo Kabushiki Kaisha|Novel fluorinated copolymer with tridihydro fluorosulfonyl fluoride pendant groups and preparation thereof|
    DE3036066C2|1980-09-25|1990-02-15|Hoechst Ag, 6230 Frankfurt, De|
    JPS6411663B2|1980-11-29|1989-02-27|Asahi Chemical Ind|
    JPS6236045B2|1982-04-30|1987-08-05|Daikin Kogyo Co Ltd|
    US4954256A|1989-05-15|1990-09-04|Pall Corporation|Hydrophobic membranes|
    JPH08500374A|1992-07-30|1996-01-16|インペリアル・ケミカル・インダストリーズ・ピーエルシー|Fluorinated polymer|
    JP2003246906A|2002-02-25|2003-09-05|Asahi Kasei Corp|Fluorine-containing copolymer composition|
    US7071271B2|2003-10-30|2006-07-04|3M Innovative Properties Company|Aqueous emulsion polymerization of functionalized fluoromonomers|
    CN102317324B|2008-12-11|2014-12-24|索尔维索莱克西斯公司|Purification of fluoroionomer compositions|
    JP5799926B2|2012-09-27|2015-10-28|旭硝子株式会社|Method for producing fluorine-containing copolymer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US78972577A| true| 1977-04-20|1977-04-20|
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