• 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:
    PURPOSE:To obtain 30 - 50% caustic alkali with highccurrent efficiency by using an electolysis bath whose cathode, anode and middle rooms are respectively separated by the specified cation exchange membrane. The caustic alkali content in the middle room is controlled to keep the value between 10 and 28%.
    公开号:SU735181A3
    申请号:SU762420507
    申请日:1976-11-18
    公开日:1980-05-15
    发明作者:Мураяма Наохиро；Судзуки Сироу；Фукуда Макото；Кокубу Есиказу；Сакагами Тероу；Эноки Тосио
    申请人:Куреха Кагаку Когио Кабусики Кайся (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to devices used in the electrochemical industry for producing chlorine and sodium hydroxide by electrolysis of sodium chloride solutions. A cell for producing chlorine and sodium hydroxide by electrolysis of sodium chloride solution is known, comprising a housing, an anode, a cathode and an ion-exchange membrane dividing the inner space of the housing into an anode and cathode chambers I. The disadvantage of this electrolyzer is a low current output during the electrolysis process. A cell is also known for producing chlorine and sodium hydroxide by electrolysis of a sodium chloride solution, comprising a housing, an anode, a cathode, and two ion-exchange membranes separating the interior of the housing into an anode, intermediate, and cathode chambers. Both ion-exchange membranes, both separating the anodic and intermediate chambers, and separating the cathodic and intermediate chambers, are made of a fluorine-containing polymer, in particular, of a homopolymer, at least one monomer selected from the group: tetrafluoroethylene, hexafluoropropylene, trifluorochloroethylene, ethyl trifluoride, vinylidene fluoride and a, D ose - styrene trifluoride, or from a copolymer of the specified monomer with an olefin, and contains the sulfonic acid radical as the main ion-exchange radical 2. The disadvantage of the known elect olizera is low vyhodpo current at obtaining highly concentrated sodium hydroxide. The aim of the invention is to increase the current efficiency in the production of highly concentrated sodium hydroxide. This goal is achieved by the fact that in the electrolyzer to obtain chlorine and sodium hydroxide by electrolysis of sodium chloride solution, comprising a housing, an anode, a cathode, two ion-exchange membranes dividing the inner space of the housing into an anode, intermediate and cathode chambers, an ion-exchange membrane separating the anodic intermediate chamber, made of a homopolymer or copolymer, at least one monomer selected from the group: tetrafluoroethylene, hexafluoropropyl, trifluorochloroethylene, trifluoride etIl,
    vinylidene fluoride and a, D / 5-styrene trifluoride; or from the polymer of the specified monomer with olefin, and contains the sulfonic acid radical as the main ion exchange membrane, and the ion-exchange membrane, the cathode section If the Redundant chamber, is made of polymer, containing briefly as the main ion-exchange radical, a phenolic radical, and a single band exchanger, a phenolic, and a single band membrane.
    The ion exchange membrane separating the cathode and intermediate chambers is advantageously made of a polyolefin copolymer with hydroxy styrene side chains.
    The drawing shows schematically the electrolyzer according to the invention.
    The cell contains a housing 1, an anode 2, a cathode 3, two ion-exchange membranes 4 and
    5 dividing the inner space of the housing to the anode chamber 6, the cathode chamber 7 and the intermediate chamber 8. Pipeline 9 serves to introduce a saturated sodium chloride solution into the anode chamber
    6, and the pipeline 10 - for the withdrawal of the depleted solution from the anode chamber.
    Water or a weak sodium hydroxide solution is supplied through conduit 11 to intermediate chamber 8, and weak sodium hydroxide solution is withdrawn through conduit 12.
    A conduit 13 connects the intermediate chamber 8 and the cathode compartment 7, and the conduit 14 is designed to discharge the highly concentrated sodium hydroxide produced.
    The ion-exchange membrane 4, which separates the anodic 6 and the intermediate 8, is made of a fluoropolymer, which is made up of a homopolymer or copolymer, of at least one of the following monomers: ethylene tetrafluoride pbpylene hexafluoride, ethylene fluoride chloride, ethyl trifluoride, and a separate polymer monomer. sulphonic acid radical as ion exchange radical.
    The ion exchange membrane 5 can also be made of a fluorine-containing resin containing an inorganic ion exchanger.
    For the introduction of the Inorganic Ion Exchanger, the resin is processed with a solution containing phosphoric, tungsten or molybdic acid and then contacted with a solution containing zirconium ions.
    The ion exchange membrane 5, separating the cathode 7 and intermediate chamber 8, is made of a copolymer, a polyolefin with hydroxy styrene side chains.
    When carrying out the process of electrolysis in the electrolyzer in accordance with the invention was obtained in the cathode chamber. 7 sodium hydroxide with a concentration of 32-39 ° / o and at the same time current efficiency of 82-87%.
    When using a known electrolyzer, in which both ion-exchange membranes are made of fluorine-containing resin and have a sulphonic acid radical as ion-exchange groups, the maximum concentration of sodium hydroxide obtained is 30 ° / o and the current efficiency is 80%.
    权利要求:
    Claims (2)
    [1]
    1. Electrolyzer for chlorine and sodium hydroxide by electrolysis of the solution
    sodium chloride, comprising a housing, an anode, a cathode, two ion-exchange membranes, separating the inner space of the housing into an anode, intermediate and cathode chambers, with the ion-exchange membrane separating the anodic and intermediate chambers made of at least one monomer selected from the group: tetrafluoroethylene, hexafluoropropylene, trifluorochloroethylene, ethyl trifluoride, vinylidene fluoride and a, D J styrene trifluoride, or from a copolymer of the indicated monomer with olefin and contains a sulfonic acid radical in as the main ion-exchange radical, characterized in that, in order to increase the current efficiency in obtaining highly concentrated
    Sodium hydroxide, an ion-exchange membrane separating the cathode and intermediate chambers, is made of a polymer containing a phenol radical or its derivatives as the main ion-exchange radical.
    [2]
    An electrolyzer according to claim 1, characterized in that the ion exchange membrane separating the cathode and intermediate chambers is made of a polyolefin copolymer with side chains of hydroxystyrene.
    Information sources,
    taken into account in the examination
    1. The patent of Germany No. 1145143, cl. 12 h, publ. 1963.
    2. For the FRG number 2260771, cl. 12 h I, pub. 1973 (prototype).
    t.-.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1075986A3|1984-02-23|Electrolytic cell for producing chlorine from solution of alkali metal hydroxide
    SU1106448A3|1984-07-30|Method of obtaining chlorine and alkali
    IT1069021B|1985-03-21|PROCESS FOR THE PRODUCTION OF ALKALINE METAL HYDROXIDE
    SU735181A3|1980-05-15|Electrolyzer for producing chlorine and sodium hydroxide
    GB2094835B|1983-11-16|Process for electrolyzing water
    EP0065547B1|1986-01-15|Permselective fluoropolymeric membrane and method of its production
    SU1750435A3|1992-07-23|Method of electrolysis of aqueous solution of sodium chloride
    IE38350L|1974-04-19|Electrolytic cells
    JPS60251290A|1985-12-11|Manufacture of potassium hydroxide
    AR246987A1|1994-10-31|Combined process for production of chlorine dioxide and sodium hydroxide
    US4963241A|1990-10-16|Electrolytic cell with recirculation means
    KR970006366A|1997-02-19|Cation exchange membrane for electrolysis and method for producing high purity potassium hydroxide
    US4076604A|1978-02-28|Process for the electrolytic treatment of alkali halide
    US4822461A|1989-04-18|Electrolytic cell
    US4212712A|1980-07-15|Process for the electrolytic treatment of alkali metal halide solution using ion exchange membranes
    JPS5641392A|1981-04-18|Electrolytic method of alkali chloride aqueous solution
    JPS63312988A|1988-12-21|Production of alkali hydroxide
    GB1468942A|1977-03-30|Process and apparatus for electrolysis
    JPS56123386A|1981-09-28|Method and apparatus for electrolysis of salt
    JPH01184293A|1989-07-21|Production of iodine and iodate
    JPS5633488A|1981-04-03|Method for electrolysis of aqueous solution of alkali chloride
    JPS5655577A|1981-05-16|Electrolyzing method for alkali metal halide
    SU1721126A1|1992-03-23|Membrane-type electrolyzer
    GB190228353A|1903-07-02|Improvements in Electrolysing Processes and Appliances.
    JPS6347386A|1988-02-29|Separation of acid and alkali from aqueous salt solution
    同族专利:
    公开号 | 公开日
    US4111780A|1978-09-05|
    FR2332341B1|1979-09-28|
    SE427288B|1983-03-21|
    JPS5263198A|1977-05-25|
    CA1094506A|1981-01-27|
    FR2332341A1|1977-06-17|
    JPS5926671B2|1984-06-29|
    DE2652771A1|1977-06-02|
    DE2652771C3|1981-11-05|
    SE7612080L|1977-05-20|
    GB1557812A|1979-12-12|
    DE2652771B2|1980-11-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3057794A|1961-10-10|1962-10-09|Pittsburgh Plate Glass Co|Electrolytic cell diaphragm|
    DE1941847A1|1968-12-31|1970-07-23|Bitterfeld Chemie|Cation exchange diaphragm for electrolysis - cells |
    BE790369A|1971-10-21|1973-04-20|Diamond Shamrock Corp|METHOD AND APPARATUS FOR THE PREPARATION OF HYDROXIDES FROM HIGH PURE ALKALINE METALS IN AN ELECTROLYTIC TANK.|
    US3904496A|1974-01-02|1975-09-09|Hooker Chemicals Plastics Corp|Electrolytic production of chlorine dioxide, chlorine, alkali metal hydroxide and hydrogen|
    US3959095A|1975-01-31|1976-05-25|Hooker Chemicals & Plastics Corporation|Method of operating a three compartment electrolytic cell for the production of alkali metal hydroxides|US4636296A|1983-08-18|1987-01-13|Gerhard Kunz|Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions|
    US4636288A|1984-01-06|1987-01-13|Vaughan Daniel J|Electrodialytic conversion of multivalent metal salts|
    DE3423653C2|1984-06-27|1993-08-19|Edr Acquisition Corp., Westport, Conn., Us|
    US4608141A|1984-11-07|1986-08-26|Allied Corporation|Multichamber two-compartment electrodialytic water splitter and method of using same for basification of aqueous soluble salts|
    US4707234A|1985-10-25|1987-11-17|Toyo Soda Manufacturing Co., Ltd.|Method for separating an acid and an alkali from an aqueous solution of a salt|
    US4636295A|1985-11-19|1987-01-13|Cominco Ltd.|Method for the recovery of lithium from solutions by electrodialysis|
    JPS6433625U|1987-08-18|1989-03-02|
    DE10004878A1|2000-02-04|2001-08-09|Sgl Technik Gmbh|Method and device for the simultaneous production of acid and base of high purity|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP50139074A|JPS5926671B2|1975-11-19|1975-11-19|
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