• 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:
    1431733 Laminated cell diaphragm HOOKER CHEMICALS & PLASTICS CORP 14 Feb 1974 [26 Feb 1973] 6739/74 Addition to 1421547 Heading B5N [Also in Division C7] A permselective barrier which is liquid- and gas-impervious and which may be used as a diaphragm in an electrolytic cell comprises at least two layers of a hydrolysed copolymer of C 2 F 4 and an ether of formula the copolymer having an equivalent weight of 900-1600. The layers may be 5-15 mils thick and may be in the form of thin films either as such or deposited on a support such as a cloth woven of P.T.F.E. or glass fibres. The barrier can comprise merely two layers of the hydrolysed copolymer, a sandwich thereof with an intermediate porous membrane such as asbestos sheet or cloth woven from polypropylene or P.T.F.E. fibres, or a four layer laminate having outer layers of asbestos and the two inner layers of the hydrolysed copolymer.
    公开号:SU784799A3
    申请号:SU742021818
    申请日:1974-02-25
    公开日:1980-11-30
    发明作者:Фалво Ральф
    申请人:Хукер Кемикал Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to an apparatus used to produce chlorine and alkali by the electrolysis of alkali metal chloride solutions. A cell for producing chlorine and alkali is known, comprising a housing, an anode, a cathode and an ion-exchange membrane separating them, made in the form of a single-layer sheet. The disadvantages of this cell are The membrane durability is low, the current efficiency is low and the alkali produced is not sufficiently clean. Also known is an electrolyzer for producing chlorine and alkali, comprising a housing, an anode, a cathode, and an ion-exchange membrane separating them, made up of at least two layers. The layers of the ion-exchange membrane are made of various ion-exchange materials — the layer located on the anode side is a fluorine-containing polymer, and the layer located on the cathode side is made of an ion-exchange material that does not contain fluorine. The disadvantage of such an electrolyzer is that the current efficiency is not high enough. The aim of the invention is to increase the current output. This goal is achieved by the fact that in an electrolyzer containing a housing, an anode, a cathode and an ion-exchange membrane separating them, made of two layers according to me, the layers of the membrane are made of the same material, which is a hydrolyzed tetrafluoroethylene-sulfonated perfluorovinyl ether copolymer of the general formula FSOi; jCF2 CF20CF (CFij,) CFrjOCF Cf having an equivalent weight from 900 to 1600. The draft diagram shows schematically the section electrolyzer. Inside the housing 1 there is an anode 2, a cathode 3 and an ion-exchange membrane 4. The anode 2 and cathode 3 can be made of any suitable material, in particular the anode 2 can be made of a ruthenium dioxide-coated titanium sheet, and the cathode 3 can be made from steel mesh. The ion exchange membrane 4 consists of two layers of the same material superimposed on one another. The material used is a hydrolyzed copolymer of tetrafluoroethylene and sulfonated perfluorovinyl ester of the general formula FS02CF2CF20CF (CFa) CF2 OCF CF2, having an equivalent weight from 900 to 1600.
    : The fitting 5 serves to introduce the NaCl solution into the anode space of the electrolyzer, and the fitting 6 serves to discharge the chlorine formed. A fitting sodium chloride solution is withdrawn through fitting 7. The fitting 8 serves to introduce water or a weak alkali solution into the cathode space of the electrolyzer. The resulting hydrogen is discharged through fitting 9, and the resulting alkali is discharged through fitting 10.
    Upon receipt of alkali concentration of 392 g / l in this cell, the current efficiency was 72.2%, while
    while in a known cell, the current efficiency is 52.2%.
    权利要求:
    Claims (2)
    [1]
    Invention Formula
    An electrolyzer for producing chlorine and alkali, comprising a housing, an anode, a cathode and an ion exchange separating them. A membrane made of at least two layers, characterized in that, in order to increase the current efficiency, the membrane layers are made of the same the material is a hydrolyzed copolymer of tetrafluoroethylene and sulfonated perfluorovinyl ether of the general formula FSO /
    [2]
    2.CF, CF20CF (CF) CF2 OCF CF, 3, having an equivalent weight from 900 to 1600
    类似技术:
    公开号 | 公开日 | 专利标题
    SU784799A3|1980-11-30|Electrolyzer for producing chlorine and alkali
    CA1123780A|1982-05-18|Production of alkali metal carbonates in acell having a carboxyl membrane
    US4100050A|1978-07-11|Coating metal anodes to decrease consumption rates
    SE434927B|1984-08-27|CATION CHANGE MEMBRANE AND USE OF THE SAME FOR ELECTROLYSIS OF A WATER DISPOSAL OF AN ALKALIMETAL CHLORIDE
    SE7907834L|1979-09-21|CATHION CHANGE MEMBRANE
    US4144146A|1979-03-13|Continuous manufacture of sodium dithionite solutions by cathodic reduction
    EP0047083A1|1982-03-10|Process for electrolyzing aqueous solution of alkali metal chloride
    US5716504A|1998-02-10|Cation exchange membrane for electrolysis and process for producing potassium hydroxide of high purity
    US4486277A|1984-12-04|Electrolytic cation exchange membrane
    EP0057065B1|1984-05-16|Production of cation permselective membrane and electrolytic cell containing said membrane
    US4066519A|1978-01-03|Cell and process for electrolyzing aqueous solutions using a porous metal separator
    US4356068A|1982-10-26|Permionic membrane
    US4487668A|1984-12-11|Fluorinated ion exchange polymer containing carboxylic groups, and film and membrane thereof
    US4062743A|1977-12-13|Electrolytic process for potassium hydroxide
    US4061550A|1977-12-06|Process for electrolysis
    US5512143A|1996-04-30|Electrolysis method using polymer additive for membrane cell operation where the polymer additive is ionomeric and added to the catholyte
    US4316789A|1982-02-23|Cation exchange membranes
    US4725347A|1988-02-16|Reinforced bipolar electrolytic cell frame
    US4316781A|1982-02-23|Method for electrolyzing alkali metal halide
    JPH06330369A|1994-11-29|Electrolytic cell for alkali metal chloride aqueous solution
    US4081349A|1978-03-28|Polyamine modified membranes and chlor-alkali electrolysis cells employing same
    PH11928A|1978-09-13|Apparatus for electrolysis of alkali metal halide brines
    JPS63118082A|1988-05-23|Method for electrolyzing aqueous solution of alkali chloride
    同族专利:
    公开号 | 公开日
    JPS49117399A|1974-11-09|
    DE2409193A1|1974-08-29|
    NO139565C|1979-04-04|
    AT328471B|1976-03-25|
    IL44138D0|1974-05-16|
    FR2218942A1|1974-09-20|
    DD109986A5|1974-12-05|
    GB1431733A|1976-04-14|
    US3976549A|1976-08-24|
    FR2218942B1|1978-01-06|
    ES423615A1|1976-11-01|
    ZA74752B|1974-12-24|
    ATA146674A|1975-06-15|
    IN141348B|1977-02-19|
    NL7402414A|1974-08-28|
    TR18094A|1976-09-30|
    IT1006372B|1976-09-30|
    AU6516974A|1975-09-04|
    CA1000652A|1976-11-30|
    MX3510E|1981-01-14|
    AU474158B2|1976-07-15|
    PH12133A|1978-11-07|
    NO740634L|1974-08-27|
    BE811412A|1974-08-21|
    US4062753A|1977-12-13|
    NO139565B|1978-12-27|
    RO70890A|1981-07-30|
    IL44138A|1976-12-31|
    PL88719B1|1976-09-30|
    BR7401170D0|1974-11-05|
    ES446163A1|1977-06-01|
    DE2409193B2|1977-06-02|
    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/335,975|US3976549A|1973-02-26|1973-02-26|Electrolysis method|
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