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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：US5900127A
公开(公告)日：1999-05-04
申请号：US825866
申请日：1997-04-02
申请人： Masamori Iida , Yoshinori Nishiki , Takayuki Shimamune , Setsuro Ogata , Masashi Tanaka , Shuhei Wakita , Shun Takahashi
发明人： Masamori Iida , Yoshinori Nishiki , Takayuki Shimamune , Setsuro Ogata , Masashi Tanaka , Shuhei Wakita , Shun Takahashi
CPC分类号： C25B11/0478 , C02F1/46109 , C02F1/4618 , C02F1/722 , C02F1/78 , C02F2001/46138 , C02F2001/46161 , C02F2201/4611 , C02F2201/46115 , C02F2201/46195
摘要： An electrode for electrolysis comprising an electrode base material and an electrode substance having an electrically conductive diamond structure covering the surface of the electrode base material. The electrode substance having an electrically conductive diamond structure may be a diamond containing an impurity selected from boron, phosphorus and graphite. Alternatively, the electrode substance having an electrically conductive diamond structure may comprise a composite of a diamond and an electrically conductive material. In a preferred embodiment, the electrode further comprises an interlayer comprising at least one of the carbide of a valve metal and silicon carbide disposed between the electrode base material and the electrode substance having an electrically conductive diamond structure. Also disclosed is an electrolytic cell having two chambers including an anode chamber and a cathode chamber partitioned by an ion-exchange membrane. At least one of the anode placed in the anode chamber and a cathode placed in the cathode chamber is an electrode comprising an electrode base material and an electrode substance having an electrically conductive diamond structure covering the surface of the electrode base material. An electrolytic cell having three chambers is also disclosed, including an anode chamber, an intermediate chamber and a cathode chamber partitioned by ion-exchange membranes. At least one of an anode placed in the anode chamber and a cathode placed in the cathode chamber is an electrode comprising an electrode base material and an electrode substance having an electrically conductive diamond structure covering the surface of the electrode base material.
摘要翻译： 一种电解用电极，其特征在于，具有电极基材和覆盖所述电极基材表面的导电性金刚石结构的电极物质。 具有导电金刚石结构的电极物质可以是含有选自硼，磷和石墨的杂质的金刚石。 或者，具有导电金刚石结构的电极物质可以包括金刚石和导电材料的复合物。 在优选实施例中，电极还包括中间层，其包括设置在电极基材和具有导电金刚石结构的电极物质之间的阀金属和碳化硅的碳化物中的至少一种。 还公开了一种具有两个腔室的电解池，该腔室包括由离子交换膜隔开的阳极室和阴极室。 放置在阳极室中的阳极中的至少一个和放置在阴极室中的阴极是包括电极基材和覆盖电极基材表面的导电金刚石结构的电极物质的电极。 还公开了一种具有三个室的电解池，包括由离子交换膜分隔的阳极室，中间室和阴极室。 放置在阳极室中的阳极中的至少一个和放置在阴极室中的阴极是包括电极基材的电极和具有覆盖电极母材表面的导电金刚石结构的电极物质。
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公开(公告)号：US5827412A
公开(公告)日：1998-10-27
申请号：US881361
申请日：1997-06-24
CPC分类号： C25B1/46 , C25B11/035
摘要： A liquid-permeable gas-diffusion cathode adapted for caustic soda electrolysis in contact with an ion-exchange membrane partitioning an electrolytic cell into an anode chamber and a cathode gas chamber. Plural horizontal concave grooves and/or convex portions are provided in an interval with one another on the surface of the gas-diffusion cathode facing the gas chamber. Plural vertical concave grooves may also be provided in an interval on the surface of the cathode crossing the horizontal grooves and/or convex portions. Aqueous caustic soda solution thus formed flows downward along the grooves, etc., without covering other portions of the cathode surface, and is easily released therefrom without clogging perforations in the gas-diffusion layer of the cathode.
摘要翻译： 一种液体可渗透的气体扩散阴极，其适于与将电解槽分隔成阳极室和阴极气体室的离子交换膜接触的苛性钠电解。 在面对气室的气体扩散阴极的表面上，间隔地设有多个水平凹槽和/或凸部。 也可以在与水平槽和/或凸部交叉的阴极表面上的间隔内设置多个垂直凹槽。 这样形成的碱性苛性钠溶液不会覆盖阴极表面的其它部分而沿着凹槽等向下流动，并且容易地从阴极的气体扩散层中堵塞穿孔而释放。
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