• 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:
    Disclosed are methods of operation for oxygen electrodes which maximize the power efficiency available from such oxygen electrodes while minimizing the voltage necessary to operate such oxygen electrodes. These methods include control of the pressure of the gas feed side of the oxygen electrode, control of the total flow of the gas feed side, the humidification of the gas feed side of the oxygen electrode and the elimination of CO2 from the gas feed to the oxygen electrode to increase the lifetime of such electrodes as applied to a chlor-alkali electrolytic cell.
    公开号:SU860711A1
    申请号:SU792734750
    申请日:1979-03-12
    公开日:1981-08-30
    发明作者:Лаури Лабарре Рональд
    申请人:Даймонд Шамрок Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the production of chemicals by electrolysis, in particular, to a process for the production of chlorine and alkali hydroxide methypla. Known method of producing chlorine and alkali metal hydroxide by electrolysis in a cell containing the anode, cathode and oxygen chambers, the cathode chamber being separated from the oxygen porous cathode with oxygen gas in the oxygen chamber corresponding to the theoretical stoichiometric amount of oxygen required for the reaction, and the process is carried out at atmospheric pressure in the oxygen chamber of the CH; the disadvantage of this method is that its productivity is low . The life of the cathode is 890940 hours. The purpose of the invention is to increase productivity by increasing the service life of the cathode. The goal is achieved by the method of obtaining chlorine and hydroxide of an alkali metal by electrolysis in a electrolyzer containing 4 iodine, cathode and oxygen chambers, the cathodes being separated from the oxygen porous cathode with the supply of oxygen gas in the oxygen chamber corresponding to 1.56 times the theoretical the stoichiometric amount of oxygen required for the reaction and the electrolysis is carried out at a pressure in the oxygen chamber attaining an atmospheric pressure of 0.25-250 g / cm V quality The gaseous oxygen-containing agent uses air that is free of carbon dioxide. The drawing shows an electrolytic cell. The electrolytic cell 1 contains, an anode 2, an ion-permeable conductive partition 3 and a cathode 4, which are located at a distance from each other with the formation of three chambers, anode chippers 5, cathode chamber 6 and oxygen chamber 7.. The cathode 4 is made of any porous material or mesh structure that is resistant to chemical corrosion. On the one hand, the cathode is provided with a coating of a porous material, such as carbon. The porous coating contains a substance that catalyzes the reaction of molecular oxygen with water molecules to form hydroxyl groups. The pressure in the oxygen chamber 7 when conducting electrolysis exceeds the pressure in the cathode chamber 6,
    Example 1. The preparation of chlorine and alkali metal hydroxide is carried out in the described electrolytic cell. Electrolysis is carried out at the anode of titanium with a coating of oxides of tonthal and iridium, and a nickel cathode with carbon coating containing silver chloride. The carbon coating is facing the oxygen chamber. Between the anode and cathode there is a membrane made of a fluorinated copolymer containing free sulfo groups.
    The electrolysis is carried out at 60 ° C and a current density of 0.15 a / cm. The pressure in the oxygen chamber is set at 110 g / cm above atmospheric. Air that is purified from carbon dioxide is supplied to the oxygen chamber in an amount corresponding to 6 times the theoretical stoichiometric amount of oxygen required for the reaction. The service life of the cathode 1240 H.
    Example 2 Carried out analogously to example 1 with the difference that carbon dioxide-free air with a temperature of 40 ° C and humidity of 90% is fed in an amount corresponding to 1.5 times the theoretical stoichiometric amount of oxygen required for the reaction, and the process is carried out with pressure. in the oxygen chamber exceeding the atmospheric pressure in the oxygen chamber by 0.25 g / cm. The life of the cathode is 1050 hours.
    Example 3 with the difference that carbon dioxide-free air with temperature and humidity 70 is supplied in an amount corresponding to 5 times the theoretical amount of oxygen required for the reaction, and the process is carried out at a pressure of oxygen kgsher exceeding atmospheric pressure by 250 g / cm. The life of the cathode is 1280 hours,
    Example 4. Analogously to example 1 with the difference that the electrolysis is carried out with the use of an anolyte containing 300 g / l of calcium chloride, and catholyte containing 100 g / l of potassium chloride. The life of the cathode is 1243.
    Example 5, Example 2, with the difference that air containing 90% of carbon dioxide is fed in an amount corresponding to 1.2 times the theoretical value, the chiometric amount of oxygen required for the reaction, and the process is carried out at a pressure in the oxygen chamber, exceeding atmospheric pressure by 0.1 g / cm. Wherein
    the service life of the cathode is 890 hours.
     Example Similarly to the example with the difference that air containing carbon dioxide is pushed into the oxygen chamber. The life of the cathode is 945 hours.
    Example 7. In example 3, with the difference that carbon dioxide-free air with a humidity of 70% is supplied in an amount corresponding to
    0 to 7 times the theoretical stoichiometric amount of oxygen required for the reaction, and the process is carried out at a pressure in the oxygen chamber exceeding the atmospheric pressure by 300 g / cm. The life of the cathode is 1375 hours.
    invention formula
    权利要求:
    Claims (2)
    [1]
    1. A method of producing chlorine and alkali metal hydroxide by electrolysis in an electrolytic cell containing an anode, cathode and oxygen chambers, the cathode being separated
    from the oxygen porous cathode, with the supply of a gaseous agent containing oxygen to the oxygen chamber, characterized in that, in order to increase productivity by increasing the service life of the cathode, the gaseous agent containing oxygen is supplied in an amount corresponding to 1.5-b times the theoretical The stoichiometric amount of oxygen required for the reaction and the electrolysis are carried out at a pressure in the oxygen chamber that exceeds the atmospheric pressure by 0.25-250 g / cm.
    [2]
    2. The method according to claim 1, characterized in that air, purified from d-carbonate, is used as a gaseous agent containing oxygen.
    5 Sources of information
    taken into account in the examination
    1. US patent No. 3926769, CL. From 25 to 9/00, published. 1975.
    类似技术:
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    SU860711A1|1981-08-30|Method of producing chloride and alkaline metal hydroxide
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    同族专利:
    公开号 | 公开日
    NO790819L|1979-09-14|
    AU529294B2|1983-06-02|
    PL214074A1|1980-03-24|
    MX154417A|1987-08-14|
    IL56855A|1982-07-30|
    IN152982B|1984-05-19|
    ZA791153B|1980-03-26|
    EP0004191B1|1982-05-05|
    EP0004191A3|1979-10-31|
    DD142456A5|1980-06-25|
    PL116783B2|1981-06-30|
    CA1155792A|1983-10-25|
    YU58579A|1983-01-21|
    IL56855D0|1979-05-31|
    NO153224C|1986-02-05|
    EP0004191A2|1979-09-19|
    BR7901504A|1979-10-09|
    ES478598A1|1980-06-16|
    JPS54132498A|1979-10-15|
    NO153224B|1985-10-28|
    AU4504779A|1979-09-20|
    DE2962670D1|1982-06-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2681887A|1950-02-03|1954-06-22|Diamond Alkali Co|Electrolytic cell|
    GB832196A|1955-01-21|1960-04-06|Jean Billiter|Electrolytic processes|
    US3775272A|1972-02-25|1973-11-27|Olin Corp|Mercury diaphragm chlor-alkali cell and process for decomposing alkali metal halides|
    US3926769A|1973-05-18|1975-12-16|Dow Chemical Co|Diaphragm cell chlorine production|
    US3923628A|1973-05-18|1975-12-02|Dow Chemical Co|Diaphragm cell chlorine production|
    JPS52124496A|1976-04-14|1977-10-19|Japan Storage Battery Co Ltd|Method of electrolyzing alkali metal chloride and apparatus therefor|DE3420483A1|1984-06-01|1985-12-05|Hoechst Ag, 6230 Frankfurt|BIPOLAR ELECTROLYSIS WITH GAS DIFFUSION CATHODE|
    US4566957A|1984-12-10|1986-01-28|United Technologies Corporation|Use of gas depolarized anodes for the electrochemical production of adiponitrile|
    JP4241926B2|1995-10-10|2009-03-18|ウィリアムジョンルイス|3-Amino-propoxyphenyl derivatives |
    PL409557A1|2014-09-22|2016-03-29|Ori-Med Spółka Z Ograniczoną Odpowiedzialnością|Orthopedic chair, preferably for rehabilitation of scolioses|
    DE102015014515A1|2015-11-11|2017-05-11|Dräger Safety AG & Co. KGaA|Electrolyte conductor, method for producing an electrolyte conductor and an electrochemical gas sensor and a gas meter with such|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US88575478A| true| 1978-03-13|1978-03-13|
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