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71. 发明专利

JPH08302492A ELECTROLYTIC CELL USING GAS DIFFUSION ELECTRODE 失效
公开(公告)号：JPH08302492A
公开(公告)日：1996-11-19
申请号：JP12924295
申请日：1995-04-28
申请人： PERMELEC ELECTRODE LTD
发明人： NISHIKI YOSHINORI , ASHIDA TAKAHIRO , SHIMAMUNE TAKAYUKI , NAKAJIMA YASUO
IPC分类号： C25B1/16 , C25B9/08 , C25B9/10 , C25B11/03 , H01M4/86 , C25B11/20
摘要： PURPOSE: To smoothly supply gas and consequently to reduce and stabilize the cell voltage by preventing the clogging of the through-hole of a gas diffusion electrode with caustic alkali generated in an alkali electrolytic cell using the gas diffusion electrode. CONSTITUTION: A liq. discharge groove is formed on the contact face of a gas diffusion electrode with a cation-exchange membrane. As a result, the amt. of caustic alkali permeating through the electrode and reaching the rear of the electrode is decreased, the clogging of the through-hole is reduced, and a gas is smoothly and continuously supplied to the reaction bed of the gas diffusion electrode.

72. 发明专利

JPH08296076A PRODUCTION OF AQUEOUS SOLUTION OF HYDROGEN PEROXIDE AND DEVICE THEREFOR 失效
公开(公告)号：JPH08296076A
公开(公告)日：1996-11-12
申请号：JP12057495
申请日：1995-04-21
申请人： PERMELEC ELECTRODE LTD , KATAYAMA CHEMICAL WORKS CO
发明人： SHIMAMUNE TAKAYUKI , NAKAJIMA YASUO , WAKITA SHUHEI , ASHIDA TAKAHIRO , NISHIKI YOSHINORI
IPC分类号： C01B15/01 , C25B1/30 , C25B9/00 , C25B9/08
摘要： PURPOSE: To provide a method and a device capable of producing hydrogen peroxide effective for a water treatment on-site and eliminating the need of a transport, etc., of a starting material. CONSTITUTION: A seawater 1 being a starting material is supplied to the first electrolytic cell 4 to electrolytically produce an alkaline aq. soln. and an acidic salt water, and an electrolysis of water is executed at the second electrolytic cell 7 while supplying the obtained alkaline aq. soln. and an oxygen-containing gas to produce the alkaline aq. soln. containing hydrogen peroxide. The obtained hydrogen peroxide-containing alkaline aq. soln. is mixed with the acidic salt water at need at a mixing tank 9 to obtain a neutral aq. sol. of hydrogen peroxide.

73. 发明专利

JPH08246181A ELECTROLYTIC METHOD 失效
公开(公告)号：JPH08246181A
公开(公告)日：1996-09-24
申请号：JP7942995
申请日：1995-03-10
申请人： PERMELEC ELECTRODE LTD
发明人： SHIMAMUNE TAKAYUKI , TANAKA MASASHI , SAWAMOTO ISAO , NISHIKI YOSHINORI
IPC分类号： C25B1/26 , C02F1/461 , C25B1/30 , C25B9/00 , C25B9/08
摘要： PURPOSE: To obtain an acidic water for cleaning a semiconductor and a hydrogen peroxide water with low power consumption and high electrolytic efficiency by using a cation exchange membrane and a noble metal anode in a two cell type high molecular solid electrolytic cell. CONSTITUTION: The electrolytic cell 1 is constituted of the cation exchange membrane 2, gaskets 3, 4 for holding the membrane, an anode chamber wall plate 5 and a cathode chamber wall plate 6, which are placed opposite to each other and substantially in contact with the cation exchange membrane 2. The cathode chamber wall plate 6 has a function for passing a catholyte and an oxygen-containing gas, the anode chamber wall plate 5 has a function for passing an anolyte, a porous anode composed of a platinum group metal or a platinum metal group oxide is provided on the anode surface of the cation exchange membrane 2 in close contact state and the other hand, a porous cathode 5 composed of platinum is provided on a cathode surface. An improved water is produced by electrolyzing while supplying an electrolyte containing an acid and a non-metallic salt from an anode chamber inlet 12 and the oxygen- containing gas from a cathode chamber inlet 16 and the improved water having the oxidation-reduction potential of 1000mV and pH

74. 发明专利

JPH08246180A ELECTROLYTIC METHOD 失效
公开(公告)号：JPH08246180A
公开(公告)日：1996-09-24
申请号：JP7942895
申请日：1995-03-10
申请人： PERMELEC ELECTRODE LTD
发明人： SHIMAMUNE TAKAYUKI , TANAKA MASASHI , SAWAMOTO ISAO , NISHIKI YOSHINORI
IPC分类号： C25B1/26 , C25B9/00 , C25B9/08
摘要： PURPOSE: To obtain an improved water small in the quantity of metallic impurities and having a specific oxidation-reduction potential and pH with excellent electrolytic efficiency by electrolyzing while supplying an electrolyte containing an acid and a non-metallic salt to an anode chamber side of a two chamber type high molecular solid electrolyte type electrolytic cell. CONSTITUTION: A porous anode 7 composed of a noble metal or noble metal oxide powder and a porous cathode 8 composed of Ni or the like are provided respectively with an anode and cathode surface of a cation exchange membrane 2 in close contact state and current is supplied through an anode and cathode collecting body 9, 10. Passages 11, 15 are formed inside of an anode and cathode chamber wall plate 5, 6. An anolyte, which is fed from an inlet 12 and in which NH4 Cl or the like is dissolved, enters to the anode chamber from an opening part 13, is brought into contact with the anode 7, oxidized by a compound having high oxidation force and high oxidation-reduction potential of >=1000mV such as hypochlorous acid and taken out from an outlet 14 as the improved water having pH

75. 发明专利

JPH08155463A METHOD AND APPARATUS FOR DECOMPOSING AMMONIACAL NITROGEN NITRIC-NITROGEN AND/OR NITROUS-NITROGEN 失效
公开(公告)号：JPH08155463A
公开(公告)日：1996-06-18
申请号：JP32962094
申请日：1994-12-02
申请人： PERMELEC ELECTRODE LTD
发明人： SHIMAMUNE TAKAYUKI , NISHIKI YOSHINORI
IPC分类号： C02F1/46 , C02F1/461 , C02F1/467
摘要： PURPOSE: To provide an ammoniacal nitrogen or the like-decomposing method and apparatus for which halogen compounds are used and which involves the lessened number of processes and scarcely produces by products, in place of method which is proposed as an ammoniacal-nitrogen-decomposing method and for which hypochlorous acid produced by reaction with ozone and bromine is used involves a large number of processes and produces a large quantity of byproducts. CONSTITUTION: A solution 2 for treatment which contains ammoniacal nitrogen and an halogen ion electrolytically treated by using an electrode structural body in which a cathode 4, a diaphragm 5, and an anode 6 are layered successively to anodically oxidize and decompose the ammoniacal nitrogen. Since conversion of halogen ion into hypohalogenous acid, halogenic acid, etc., and contact of the hypohalogenous acid etc., with ammoniacal nitrogen are carried out in a single process without using ozone, the number of processes is lessened and byproducts are decreased.

76. 发明专利

JPH07278864A GAS DIFFUSION ELECTRODE 失效
公开(公告)号：JPH07278864A
公开(公告)日：1995-10-24
申请号：JP9365494
申请日：1994-04-06
申请人： PERMELEC ELECTRODE LTD
发明人： NONAKA TSUTOMU , ASHIDA TAKAHIRO , WAKITA SHUHEI , SHIMAMUNE TAKAYUKI , NISHIKI YOSHINORI
IPC分类号： C25B11/03 , C25B11/12 , H01M4/86
摘要： PURPOSE:To decrease the number of constituting components to simplify the structure and to prevent the deterioration of performance caused by peeling in a gas diffusion electrode. CONSTITUTION:This gas diffusion electrode is composed of a water permeable gas diffusion and reaction layer 2 and a porous conductive electrode collector 4, on which a water repellent layer 3 is formed in press-contact with the gas diffusion and reaction layer 2. Since the gas diffusion and reaction layer 2 has both functions of the gas diffusion layer and the reaction layer of the conventional gas diffusion electrode and a liquid is excluded from the surface of the electrode collector 4 by the water repellent layer, the number of the constituting members of the gas diffusion electrode is decreased and the electrode is easily gas-permeable, and the deterioration of performance caused by the peeling among its members is prevented.

77. 发明专利

JPH04276090A ELECTROCHEMICAL ELECTRODE AND CELL STRUCTURE 失效
公开(公告)号：JPH04276090A
公开(公告)日：1992-10-01
申请号：JP6124091
申请日：1991-03-01
申请人： PERMELEC ELECTRODE LTD
发明人： HOSONUMA MASASHI , UCHIDA CHINATSU , KATO MASAAKI , NISHIKI YOSHINORI
IPC分类号： C25B11/04 , C25B11/08 , H01M4/86
摘要： PURPOSE:To firmly bond a disphragm and a current collector and to maintain the performance of a cell by forming the electrode contg. an electrode catalytic component and a thermoplastic rubber component into a film and pressure- welding the electrode to the solid electrolyte and collector. CONSTITUTION:A thermoplastic rubber excellent in corrosion resistance, e.g. a fluororubber, and an electrode catalytic component (or a carrier) are heated above the m.p. of the rubber and kneaded. The kneaded material is formed into a film-shaped electrode. The electrode is pressure-welded to a solid electrolyte and/or a current collector and integrated to obtain a cell structure of SPE type, etc. Since the electrode has good elasticity, the electrode is elastically deformed only by pressure-welding it to the diaphragm or collector, the adhesion between the welded surfaces is increased, and the performance of the cell, e.g. a decrease in resistance, is improved.

78. 发明专利

JPH03243784A PRODUCTION OF WATER ELECTROLYZING ELECTRODE 失效
公开(公告)号：JPH03243784A
公开(公告)日：1991-10-30
申请号：JP3965490
申请日：1990-02-22
申请人： PERMELEC ELECTRODE LTD
发明人： SHIMAMUNE TAKAYUKI , SAWAMOTO ISAO , NISHIKI YOSHINORI , UCHIDA CHIKA
IPC分类号： C25B11/03 , C25B1/06 , C25B1/13 , C25B1/30 , C25B11/08 , C25B11/16
摘要： PURPOSE:To reduce the production cost of an electrode and to improve efficiency in generating ozone at the time of producing the PbO2 electrode to be used when water is electrolyzed and ozone is generated from an anode by coating the electrode surface with the electrode material only at the part which is efficiently used in electrolysis. CONSTITUTION:This electrode to be used in an electrolytic cell for generating ozone by water electrolysis is produced. In this case, an aq. viscous soln. of a noble metal compd. such as chloroplatinic acid, turpentine, etc., having 100-10,000 cp viscosity is applied on one surface of a porous electrode substrate consisting of the sintered body of Ti powder, etc., and calcined. The process is repeated plural times to form a base layer of platinum on only one surface of the substrate. Since the platinum-contg. soln. is viscous, the platinum base layer is formed on only one surface of the substrate with a small amt., and a catalytic layer of PbO2 to be efficiently utilized in water electrolysis is formed thereon. The platinum base layer and the PbO2 catalytic layer are thus formed on only one surface of the electrode contributing to water electrolysis, and consequently an water electrolyzing electrode capable of generating gaseous ozone with good efficiency is produced at a low cost.

79. 发明专利

JPH03100453A METHOD AND DEVICE FOR MEASURING OZONE CONCENTRATION 失效
公开(公告)号：JPH03100453A
公开(公告)日：1991-04-25
申请号：JP23787889
申请日：1989-09-13
申请人： PERMELEC ELECTRODE LTD
发明人： KOBAYASHI ATSUSHI , AOKI KOICHI , KATOU NAKABIDE , NISHIKI YOSHINORI
IPC分类号： G01N27/30 , G01N27/416
摘要： PURPOSE:To extremely improve sensitivity and to enable measurement of ozone concn. over a wide range by using a carbon-reinforced electrode as an electrode. CONSTITUTION:Ozonized water 2 flowing in a piping 1 comes into contact with a sensor 3 installed at the intermediate point of the piping 1 and the ozone concn. is measured. A sensor 3 has 3 kinds of electrodes; the carbon-reinforced electrode 4 which is the core of a sharp pencil, a reference electrode 5 which is a satd. calomel electrode and a counter electrode 6 which is platinum electrode. The front end part of the carbon-reinforced electrode 4, the front end part of the reference electrode 5 and the counter electrode 6 are disposed in proximity to each other to a sensor fixing member 7 so as to minimize the change in the current value occurring in liquid resistance. The sensor 3 is generally installed in the ozonized water in a suitable container or inside of the piping. The current generated in the sensor 3 is detected as a current value through a potentiostat 8 and the detected value is displayed or recorded in a display part 9. The sensitivity of the device is extremely improved in this way and the measurement of the ozone concn. over a wide range is enabled.

80. 发明专利

JPH0320488A METHOD FOR GENERATING OZONE BY WATER ELECTROLYSIS 失效
公开(公告)号：JPH0320488A
公开(公告)日：1991-01-29
申请号：JP15607889
申请日：1989-06-19
申请人： PERMELEC ELECTRODE LTD
发明人： SAWAMOTO ISAO , NISHIKI YOSHINORI , MASUDA HIROSHI , UCHIDA CHINATSU
IPC分类号： C25B9/10 , C25B1/04 , C25B1/13 , C25B1/30
摘要： PURPOSE:To produce high purity ozone with high electrolytic efficiency over a long period at the time of electrolyzing water in an electrolyte cell separated into an anode chamber and a cathode chamber to generate ozone in the anode chamber by electrolyzing water with the purity of the water as the electrolyte specified. CONSTITUTION:The electrolytic cell made of Ti, 'Teflon(R)', etc., is separated into the anode chamber and the cathode chamber by a solid electrolyte ion- exchange membrane of fluororesin, etc. An anode activating material such as beta-PbO2 is applied on the surface of the membrane on the anode chamber side, and a cathode activating material such as a platinum-group metal or its oxide is applied on the surface on the cathode side. Water as an electrolyte is charged to the cell, and electrolysis is carried out at 25-35 deg.C, 3.0-3.5V cell voltage and 50-150A/dm current density to generate a gaseous mixture of ozone and oxygen in the anode chamber. In this case, when at least one kind among >=100mus/cm, electrolyte conductivity, >=0.05ppm Ca concn., >=0.1ppm Fe concn., >=1ppm Si concn. and

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