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公开(公告)号：US06527940B1
公开(公告)日：2003-03-04
申请号：US08818447
申请日：1997-03-17
IPC分类号： C02F1461
CPC分类号： C02F1/4618 , C02F1/4674 , C02F2001/46195 , C02F2103/026 , C02F2201/46115 , C02F2201/4612 , C02F2201/4613 , C02F2201/46195 , C02F2209/04
摘要： Electrolysis is carried out while supplying an aqueous sodium chloride solution having a weak acidic property to the anode chamber of a water electrolytic cell. The electrolytic cell is partitioned with a cation-exchange membrane into an anode chamber and a cathode chamber. Furthermore, because the pH of the anolyte is sufficiently reduced due to the acid content and pH of the liquid supplied to the anode chamber from the start of electrolysis, which is different from a conventional electrolytic method, the electrolysis of the present invention may be carried out for a time needed to obtain a sufficiently high oxidation reduction potential. Thus, acid water almost the same as that obtained in a conventional method is obtained in the present invention by consuming about {fraction (1/10)} the electric power that is used in a conventional method.
摘要翻译： 在向水电解槽的阳极室供给具有弱酸性的氯化钠水溶液的同时进行电解。 将电解槽用阳离子交换膜分隔成阳极室和阴极室。 此外，由于不同于以往的电解方法，由于从电解开始供给到阳极室的液体的酸含量和pH值充分降低了阳极电解液的pH，所以可以承载本发明的电解 需要一段时间才能获得足够高的氧化还原电位。 因此，在本发明中通过消耗常规方法中使用的电力的大约1/10，获得与常规方法中获得的酸水几乎相同的酸水。
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公开(公告)号：US6126796A
公开(公告)日：2000-10-03
申请号：US81059
申请日：1998-05-19
CPC分类号： C02F1/4674 , C02F1/4618 , C02F2001/46133 , C02F2001/46161 , C02F2001/46185 , C02F2201/46115 , C02F2201/4618 , C02F2201/46185 , C02F2201/46195 , C02F2209/04 , C02F2209/06 , C02F2303/04
摘要： An electrolytic cell for the production of acid water which performs simple operation to produce acid water without complicated control over the concentration of hydrochloric acid to be added or precipitation of alkaline earth metal salts, which are disadvantages of the prior art electrolysis for the production of acid water. An electrolytic cell for the production of acid water, which comprises a power supply for applying a voltage across an anode chamber and a cathode chamber partitioned by an ion-exchange membrane. The anode in the anode chamber is disposed in close contact with the ion-exchange membrane. The electrolytic cell further comprises means for supplying an aqueous solution of hydrochloric acid and water to the cathode chamber and the anode chamber, respectively. Hydrochloric acid is not directly added to the anode chamber but indirectly added to the anode chamber by diffusing through the ion-exchange membrane. In this manner, hydrochloric acid is uniformly dispersed into the anode chamber by diffusing through the ion-exchange membrane. Thus, the need for controlling concentration is eliminated. Furthermore, because both the catholyte and anolyte are kept acidic, no precipitation of metal salts occurs.
摘要翻译： 一种用于生产酸水的电解池，其操作简便，不需要对添加的盐酸的浓度进行复杂控制，或者沉淀碱土金属盐，这是现有技术电解生产酸的缺点 水。 一种用于生产酸水的电解池，包括用于施加跨越阳极室的电压的电源和由离子交换膜分隔的阴极室。 阳极室中的阳极设置成与离子交换膜紧密接触。 电解槽还包括用于将盐酸和水的水溶液分别供应到阴极室和阳极室的装置。 盐酸不直接添加到阳极室，而是通过离子交换膜扩散而间接添加到阳极室。 以这种方式，盐酸通过离子交换膜扩散而均匀地分散到阳极室中。 因此，消除了控制浓度的需要。 此外，由于阴极电解液和阳极电解液都保持酸性，因此不会发生金属盐沉淀。
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公开(公告)号：US6159349A
公开(公告)日：2000-12-12
申请号：US185034
申请日：1998-11-03
申请人： Shuhei Wakita , Yoshinori Nishiki , Takayuki Shimamune , Yasuo Nakajima , Masaaki Katoh , Yoshiyuki Kawaguchi , Takahiro Ashida , Masaharu Uno
发明人： Shuhei Wakita , Yoshinori Nishiki , Takayuki Shimamune , Yasuo Nakajima , Masaaki Katoh , Yoshiyuki Kawaguchi , Takahiro Ashida , Masaharu Uno
CPC分类号： C02F1/4672 , C02F1/46109 , C02F1/722 , C02F2001/46142 , C02F2001/46166 , C02F2303/04
摘要： An electrolytic cell for producing a brine containing hydrogen peroxide is disclosed. Units for hydrogen peroxide production 3 and units for water electrolysis 2 are alternately arranged in the same electrolytic cell 1. Electrolysis is conducted while supplying hydrogen gas and oxygen gas generating in the respective water electrolysis units to a gas diffusion anode 11 and a gas diffusion cathode 13 of each unit for hydrogen peroxide production, to thereby obtain a brine containing hydrogen peroxide in a high concentration. Furthermore, because the anode of the hydrogen peroxide production units is a hydrogen gas diffusion anode having a reduced oxidizing ability, halogen ions contained in the seawater do not yield harmful halogenated organic substances.
摘要翻译： 公开了一种用于生产含有过氧化氢的盐水的电解池。 用于过氧化氢生产的单元3和水电解单元2交替地布置在同一电解槽1中。在将各个水电解单元中产生的氢气和氧气供应到气体扩散阳极11和气体扩散阴极 13单位用于过氧化氢生产，从而获得含有高浓度过氧化氢的盐水。 此外，由于过氧化氢生产单元的阳极是具有降低的氧化能力的氢气扩散阳极，所以在海水中所含的卤离子不产生有害的卤化有机物质。
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4.发明授权Electrolytic cell and processes for producing alkali hydroxide and hydrogen peroxide 失效电解池和碱氢氧化物和过氧化氢的制备方法
公开(公告)号：US5437771A
公开(公告)日：1995-08-01
申请号：US196442
申请日：1994-02-15
摘要： The electrolytic cell 1 for producing alkali hydroxide or hydrogen peroxide is divided into the anode compartment 3 and the cathode compartment 4 by the cation exchange membrane 2. The cathode compartment 4 is further divided by the anion exchange membrane 6 into the solution compartment 7 containing a concentrated aqueous solution of alkali hydroxide and the gas compartment accommodating the gas cathode 8. The anion exchange membrane 6 prevents the gas cathode 8 from coming into direct or indirect contact with the aqueous solution of alkali hydroxide. This leads to the extended life of the gas cathode. The above-mentioned arrangement is effective in large-sized electrolytic cells. Thus, the present invention can be applied to industrial electrolysis which has never been achieved with the conventional gas electrode.
摘要翻译： 用于生产碱金属氢氧化物或过氧化氢的电解池1通过阳离子交换膜2分成阳极室3和阴极室4.阴极室4进一步被阴离子交换膜6分成溶液室7， 碱性氢氧化物的浓缩水溶液和容纳气体阴极8的气室。阴离子交换膜6防止气体阴极8与碱金属氢氧化物水溶液直接或间接接触。 这导致气体阴极的寿命延长。 上述布置在大尺寸电解槽中是有效的。 因此，本发明可以应用于以往的气体电极从未实现的工业电解。
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公开(公告)号：US5766429A
公开(公告)日：1998-06-16
申请号：US659242
申请日：1996-06-05
CPC分类号： C25B11/035 , C25B1/46 , C25B9/08
摘要： An electrolytic cell for producing sodium hydroxide, etc., which is partitioned by an ion-exchange membrane into an anode chamber and a cathode chamber, wherein at least one of a anode and a cathode is closely contacted to the ion-exchange membrane to form a gas diffusion electrode, and a current supplying means having guides for removing sodium hydroxide, etc., formed at the surface of the gas diffusion electrode is disposed therein closely contacting the gas diffusion electrode. By having a current supplying means having removing guides, sodium hydroxide formed at the surface of the gas diffusion electrode is separated therefrom and removed, whereby the supply of the raw material gas and removal of the produced gas can be smoothly performed without clogging perforations of the gas diffusion electrode with the sodium hydroxide.
摘要翻译： 一种用于生产氢氧化钠等的电解池，其由离子交换膜分隔成阳极室和阴极室，其中阳极和阴极中的至少一个与离子交换膜紧密接触以形成 在气体扩散电极的表面形成有气体扩散电极和具有用于除去氢氧化钠等的引导件的电流供给装置配置在与气体扩散电极紧密接触的位置。 通过具有除去引导件的电流供给装置，在气体扩散电极的表面形成的氢氧化钠被分离并除去，从而可以顺利地进行原料气体的供给和产生的气体的除去，而不会堵塞 气体扩散电极与氢氧化钠。
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公开(公告)号：US5676808A
公开(公告)日：1997-10-14
申请号：US636148
申请日：1996-04-22
CPC分类号： H01M4/8605 , C25B11/03 , C25B11/035 , C25B9/08
摘要： An electrolytic cell for obtaining a caustic alkali by closely contacting a gas diffusion electrode comprising a gas-liquid permeable metal substrate and a gas-liquid permeable collector connected to the substrate to a cation-exchange membrane while supplying an oxygen-containing gas from the opposite side of the cation-exchange membrane. Grooves for taking out a liquid containing a caustic alkali are formed in the contact surface of the gas diffusion electrode with the cation-exchange membrane. By the formation of the grooves, clogging of the perforations of the gas diffusion electrode with the caustic alkali so formed is prevented, whereby the gas supply can be smoothly carried out and the electrolysis can be stably carried out without reducing the cell voltage.
摘要翻译： 一种用于通过将包含气液渗透性金属基板的气体扩散电极和与基板连接的气液渗透性集电体与阳离子交换膜紧密接触而获得苛性碱的电解槽，同时从相对的方向供给含氧气体 侧阳离子交换膜。 在气体扩散电极与阳离子交换膜的接触表面中形成用于取出含有苛性碱的液体的槽。 通过形成槽，防止气体扩散电极的穿孔与这样形成的苛性碱的堵塞，从而可以平稳地进行气体供给，并且可以在不降低电池电压的情况下稳定地进行电解。
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公开(公告)号：US5746896A
公开(公告)日：1998-05-05
申请号：US626925
申请日：1996-04-03
CPC分类号： C25B11/04 , C25B11/03 , H01M4/8853 , H01M4/8885
摘要： A method of producing a gas diffusion electrode by forming a thin layer comprising a carbon power and a silver powder on the surface of a substrate comprising silver, copper, nickel or stainless steel and fluorinating the thin layer make the carbon water repellent. The gas diffusion electrode can be stably used for a long period of time in sodium chloride electrolysis, etc., without clogging the passage of gas and lowering the water repellency of the electrode.
摘要翻译： 通过在包含银，铜，镍或不锈钢的基材的表面上形成包含碳粉和银粉的薄层制造气体扩散电极的方法，并使氟层氟化。 气体扩散电极可以在氯化钠电解等中长期稳定地使用，而不会堵塞气体的通过并降低电极的斥水性。
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公开(公告)号：US5584976A
公开(公告)日：1996-12-17
申请号：US636185
申请日：1996-04-22
CPC分类号： H01M4/86 , C25B11/035
摘要： A gas diffusion electrode comprisinga porous sheet substrate, at least the surface of which is formed by silver;a reaction layer formed on a first surface of the substrate, comprising a porous silver layer and a mixed layer further comprising a hydrophilic material and a hydrophobic material, the mixed layer being formed on a surface of the porous silver layer; and,a gas diffusion layer formed on a second surface of the substrate, comprising a hydrophobic material.The gas diffusion electrode can be stably used for, e.g., sodium chloride electrolysis for extended periods of time even under severe conditions.
摘要翻译： 一种气体扩散电极，包括至少其表面由银形成的多孔片基片; 形成在所述基板的第一表面上的反应层，包括多孔银层和进一步包含亲水材料和疏水材料的混合层，所述混合层形成在所述多孔银层的表面上; 以及形成在所述基板的第二表面上的气体扩散层，其包含疏水性材料。 即使在恶劣条件下，气体扩散电极也可以稳定地用于例如氯化钠电解延长的时间。
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公开(公告)号：US5466347A
公开(公告)日：1995-11-14
申请号：US162761
申请日：1993-12-07
申请人： Takayuki Shimamune , Yasuo Nakajima
发明人： Takayuki Shimamune , Yasuo Nakajima
摘要： The present invention is intended to prevent the formation of impurities such as chlorate in electrolysis using the ion exchange membrane method, without resorting to the addition of hydrochloric acid to counter the migration of alkali hydroxide from the cathode compartment to the anode compartment. The method of the present invention includes feeding a portion of an aqueous solution of an alkali chloride (as the raw material) into an auxiliary electrolytic cell of the cation exchange membrane type in which the anode is a hydrogen gas electrode, thereby effecting electrolysis to generate hydrochloric acid in the anode compartment, and then feeding the hydrochloric acid-containing aqueous solution of alkali chloride into the main electrolytic cell, thereby neutralizing the alkali hydroxide which migrates from the cathode compartment. This method inherently forms hydrochloric acid in the system, obviating the need for having an additional facility for synthesis of hydrochloric acid, thus permitting the efficient production of alkali hydroxide and chlorine without the addition of hydrochloric acid.
摘要翻译： 本发明是为了防止使用离子交换膜法在电解中形成杂质如氯酸盐，而不需要加入盐酸以抵抗碱金属氢氧化物从阴极室向阳极室的迁移。 本发明的方法包括将碱性氯化物（作为原料）的水溶液的一部分供给到阳极为氢气电极的阳离子交换膜型的辅助电解槽中，进行电解以产生 盐酸在阳极室中，然后将含盐酸的氯化碱水溶液进料到主电解槽中，从而中和从阴极室迁移的碱金属氢氧化物。 该方法固有地在体系中形成盐酸，避免了需要另外的合成盐酸的设备，从而允许在不添加盐酸的情况下有效地生产碱金属氢氧化物和氯。
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公开(公告)号：US6103299A
公开(公告)日：2000-08-15
申请号：US109597
申请日：1993-08-20
申请人： Takayuki Shimamune , Yasuo Nakajima
发明人： Takayuki Shimamune , Yasuo Nakajima
CPC分类号： C25B11/0478 , C25B11/041 , C25B11/0426 , C25B11/0484
摘要： An electrolytic electrode substrate comprises an electrically conductive substrate and, formed on the surface of the electrically conductive substrate, an oxide layer having a thickness of from 10 to 200 .mu.m, wherein the oxide in the oxide layer comprises a non-stoichiometric composition containing oxygen and at least one metal selected from the group consisting of titanium, tantalum, and niobium. An advantage of the electrode substrate is that it is stable when used in electrolytic processes involving a reversal of current flow. Further, the electrode substrate is stable in the presence of corrosive substances such as a fluorine.
摘要翻译： 电解电极基板包括导电基板，并且在导电基板的表面上形成厚度为10-200μm的氧化物层，其中氧化物层中的氧化物包含含氧的非化学计量组成 和选自钛，钽和铌中的至少一种金属。 电极基板的优点是当用于涉及电流反转的电解过程中时它是稳定的。 此外，电极基板在存在腐蚀性物质如氟的情况下是稳定的。
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