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21. 发明专利

JPS63130141A DECOMPOSITION CATALYST OF HYPOCHLORITE AND ITS PREPARATION 失效
公开(公告)号：JPS63130141A
公开(公告)日：1988-06-02
申请号：JP27643486
申请日：1986-11-21
申请人： PERMELEC ELECTRODE LTD
发明人： OGATA SETSUO , NAKAMATSU HIDEJI , SHIMAMUNE TAKAYUKI
IPC分类号： C01D3/14 , B01J23/40 , B01J23/46 , B01J23/89 , C02F1/58
摘要： PURPOSE:To eliminate the elution of a catalytic component to a liquid to be treated and to prevent the deterioration thereof due to use, by forming the decomposition catalyst of hypochlorite from metal oxide containing at least one kind of oxide of a platinum group metal as an active component. CONSTITUTION:A metal salt solution containing a thermally decomposable salt of at least one kind of a platinum group metal selected from ruthenium, palladium, iridium, rhodium and platinum is heated in an oxidative atmosphere to prepare a decomposition catalyst of hypochlorite containing metal oxide as an active component. This catalyst is pref. prepared by a method wherein the metal salt containing the aforementioned platinum group metal is applied to a corrosion resistant substrate such as titanium or a titanium alloy and heated at 300-600 deg.C in an oxidative atmosphere. The obtained catalyst is extremely stable and shows no elution of the catalytic components during use and can be also used in the decomposition of hypochlorite of drinking water.

22. 发明专利

JP2001049478A ELECTROLYSIS METHOD 失效
公开(公告)号：JP2001049478A
公开(公告)日：2001-02-20
申请号：JP23077299
申请日：1999-08-17
申请人： KANEGAFUCHI CHEMICAL IND , TOAGOSEI CO LTD , MITSUI CHEMICALS INC , PERMELEC ELECTRODE LTD
发明人： SAIKI KOJI , SAKATA AKIHIRO , AIKAWA HIROAKI , NAKAMATSU HIDEJI
IPC分类号： C25B11/03 , C25B1/46 , C25B9/08
摘要： PROBLEM TO BE SOLVED: To provide an electrolysis method which is an oxygen cathode salt electrolysis method of a two chamber type and enables the additional lowering of light voltage consumption. SOLUTION: This electrolysis method consists in obtaining chlorine and an aqueous caustic soda solution by introducing brine into an anode chamber of a vertical type electrolytic cell, which is isolated to the anode chamber 5 and a cathode chamber by a cation exchange membrane 4, is disposed with anodes and cathodes in proximity to the cation exchange membrane respectively from both sides in the respective chambers and in which the cathode is a liquid permeation type gas diffusion electrode 5, and introducing oxygen-containing gas and water into the cathode chamber. In the method described above, the entire amount of the oxygen-containing gas and the water is introduced from the side into the upper part of the cathode chamber from plural introducing ports disposed in a horizontal direction from the introducing section 29 disposed laterally in the uppermost part of the cathode chamber. The excess gaseous oxygen and the formed aqueous caustic soda solution are withdrawn sideways from the lower part of the cathode chamber through the plural discharge ports disposed in a horizontal direction then to a discharge port 30 disposed laterally in the lowermost part of the cathode chamber.

23. 发明专利

JP2000256887A ELECTRODE FOR HYDROGEN PEROXIDE PRODUCTION AND ITS PRODUCTION 失效
公开(公告)号：JP2000256887A
公开(公告)日：2000-09-19
申请号：JP5675899
申请日：1999-03-04
申请人： PERMELEC ELECTRODE LTD
发明人： OSAKA TAKEO , UNO MASAHARU , NISHIKI YOSHINORI , NAKAMATSU HIDEJI
IPC分类号： C25B11/06 , C25B1/30
摘要： PROBLEM TO BE SOLVED: To suppress the additional reduction and self-decomposition of hydrogen peroxide ions formed on an electrode and to obtain the hydrogen peroxide with high current efficiency by modifying at least a part of a conductive substrate coated with an electrode catalyst on its surface with sulfur and constituting this substrate as a gas diffusion cathode. SOLUTION: An electrolytic cell body 1 is segmented by a cation exchange membrane 1 and an insoluble metallic anode 5 is arranged in proximity to its anode chamber 3 side. The gas diffusion cathode 6 having a cathode current collector 7 is arranged in tight contact with a cathode chamber 4 side. Carbon cloth formed by molding carbon powder via a fluororesin is formed as the conductive substrate and the surface thereof is coated by a gold catalyst as the electrode catalyst by vapor deposition, or the like, by which the above cathode 6 is constituted. At this time, the catalyst coated conductive substrate is used by immersing the substrate into a sodium sulfide solution and depositing the sulfur on the surface of the gold catalyst. An electrolysis is effected by supplying a dilute aqueous NaOH solution from an anolyte supplying port 8 to the anode chamber 3 and oxygen-containing gas from a hydrogen peroxide take-out port 10 to the cathode chamber 4. The formed hydrogen peroxide is recovered from an oxygen-containing gas supply port 11.

24. 发明专利

JP2000144466A OXYGEN REDUCING ELECTRODE AND PRODUCTION OF HYDROGEN PEROXIDE USING THE ELECTRODE 失效
公开(公告)号：JP2000144466A
公开(公告)日：2000-05-26
申请号：JP32880298
申请日：1998-11-05
申请人： PERMELEC ELECTRODE LTD
发明人： OSAKA TAKEO , UNO MASAHARU , NISHIKI YOSHINORI , WAKITA SHUHEI , NAKAMATSU HIDEJI
IPC分类号： C25B1/30
摘要： PROBLEM TO BE SOLVED: To provide an oxygen reducing electrode by which hydrogen peroxide is highly efficiently produced electrochemically more easily than heretofore and to furnish the method for producing hydrogen peroxide using the electrode. SOLUTION: A cathode 6 formed by coating the surface of an electrically conductive electrode substrate with gold and further modifying the gold with an org. compd. contg. a thiol group or a disulfide group is placed in a cathode compartment 4 formed by dividing a hydrogen peroxide producing electrolytic cell 1 by an ion-exchange membrane 2, being supplied an oxygen-contg. gas into the cathode compartment, a current is applied between the electrodes. The electrode surface is made hydrophobic by the Au-S coupling formed on the cathode surface to promote the formation of superoxide ion as an intermediate, further the electrode reduction of the subsequently formed hydrogen peroxide ion to hydroxide ion and the autolytic reaction are suppressed, and hydrogen peroxide is almost selectively formed with high efficiency.

25. 发明专利

JPH11269686A PRODUCTION OF HYDROGEN PEROXIDE AND ELECTROLYTIC CELL FOR PRODUCTION OF HYDROGEN PEROXIDE 失效
公开(公告)号：JPH11269686A
公开(公告)日：1999-10-05
申请号：JP9077598
申请日：1998-03-18
申请人： PERMELEC ELECTRODE LTD
发明人： NISHIKI YOSHINORI , WAKITA SHUHEI , NAKAMATSU HIDEJI , TANAKA MASASHI , KUROSU TATEO
IPC分类号： C25B11/06 , C02F1/46 , C02F1/461 , C02F1/467 , C02F1/72 , C25B1/13 , C25B1/30 , C25B9/00 , C25B9/08
摘要： PROBLEM TO BE SOLVED: To obtain hydrogen peroxide together with ozone and oxygen with high efficiency by electrolyzing water by using an anode contg. an electrode material having a conductive diamond structure. SOLUTION: The electrode is constituted by coating an electrode base body with a material consisting of fine particles of about 0.01 to 1 μm having the conductive diamond structure. This electrode is used as the anode of an electrolytic cell. The base body may also be commonly used as a current collector, for which materials, such as titanium, niobium, tantalum, silicon, carbon and nickel tungsten carbide, are used. The anode and cathode are energized therebetween while pure water is supplied from the pure water supply port of the electrolytic cell. The acidic water dissolved with the hydrogen peroxide, ozone and oxygen is formed in the anode chamber. Alkaline water is formed in the cathode chamber. An impurity, such as phosphous, boron, is added to the diamond which is the electrode material of the anode to impart the electrical conductivity thereto. The amt. of the hydrogen peroxide and ozone to be generated may be regulated by selecting the kind and amt. of the impurities or selecting electrolytic conditions.

26. 发明专利

JPH10280180A APPARATUS FOR PRODUCTION OF HYDROGEN PEROXIDE WATER AND METHOD THEREFOR 失效
公开(公告)号：JPH10280180A
公开(公告)日：1998-10-20
申请号：JP9973597
申请日：1997-04-02
申请人： PERMELEC ELECTRODE LTD , KATAYAMA CHEMICAL WORKS CO
发明人： SHIMAMUNE TAKAYUKI , NAKAMATSU HIDEJI , TANAKA MASASHI , WAKITA SHUHEI , UNO MASAHARU , NISHIKI YOSHINORI , NISHIMURA KUNIO , ANDO MASAHIRO
IPC分类号： C01B15/01 , C25B1/30
摘要： PROBLEM TO BE SOLVED: To provide an apparatus for electrolytic production of high-purity hydrogen peroxide water to be used for a washing treatment, etc., of electronic devices and liquid crystals. SOLUTION: At the time of forming atomic hydrogen in an electrolytic cell in which an anode 7 and a cathode 8 consisting of a hydrogen occlusion metal and/or alloy (more preferably palladium and palladium alloy) is housed and forming hydrogen peroxide by reducing the oxygen by the device, the anode and the cathode are segmented by using an ion exchange membrane 2 functioning as a solid electrolyte. As a result, the need for dissolving the electrolytic substance into the electrolyte is eliminated and the intrusion of the anodic substance into the hydrogen peroxide water to be formed is prevented and therefore, the hydrogen peroxide water of the high-purity free from the intrusion of impurities may be provided.

27. 发明专利

JPH06330367A PRODUCTION OF GAS ELECTRODE 失效
公开(公告)号：JPH06330367A
公开(公告)日：1994-11-29
申请号：JP13961493
申请日：1993-05-18
申请人： PERMELEC ELECTRODE LTD
发明人： WAKITA SHUHEI , NISHIKI YOSHINORI , NAKAMATSU HIDEJI
IPC分类号： C25B11/08 , C25B1/13 , C25B11/12 , H01M4/86 , H01M4/88 , H01M4/96 , H01M8/10
摘要： PURPOSE:To economically and safely produce a gas electrode excellent in performance by applying and firing an organic solution of a platinum group metallic salt on one side of a sheet like base body obtained by mixing and firing a carbon powder with a fluororesin powder. CONSTITUTION:The sheet like gas electrode base body is obtained by kneading the carbon powder and the fluororesin powder with a solvent such as naphtha in a prescribed ratio to make paste like material, working it into sheet like body by a rolling roll or the like and firing. The carbon powder preferably has

28. 发明专利

JPH06330366A ELECTRODE FOR ELECTROLYSIS 失效
公开(公告)号：JPH06330366A
公开(公告)日：1994-11-29
申请号：JP11834893
申请日：1993-05-20
申请人： PERMELEC ELECTRODE LTD
发明人： NAKAMATSU HIDEJI , ASHIDA TAKAHIRO
IPC分类号： C25B1/02 , C25B11/04 , C25B11/06 , C25B11/08 , C25B11/10
摘要： PURPOSE:To prevent the corrosion of an electrode base body and the peeling of catalytic coating film therefrom and to facilitate the recoating thereon by forming a water repellent synthetic resin layer, having the powder of an electrode catalytic material dispersed, on the electrode base body used under a corrosive environment. CONSTITUTION:A layer of a fluororesin as the water repellent synthetic resin made by dispersing the powder mainly containing iridium oxide as the electrode catalytic material is formed on the electrode base body such as titanium used for the electrolysis of salt water. In this case, the mixing ratio of the iridium oxide powder with the fluororesin is preferably (1:0.6)-(1:0.2) by weight ratio and the average particle diameter of the electrode catalytic material is preferably 1-10mum. It is preferable to enlarge surface area or roughen the surface by previously blast treating or etching, etc., of the surface of the base body to increase the adhesivility of the base body to the electrode coating film.

29. 发明专利

JPH06179993A ELECTROLYTIC CELL 失效
公开(公告)号：JPH06179993A
公开(公告)日：1994-06-28
申请号：JP35263492
申请日：1992-12-10
申请人： PERMELEC ELECTRODE LTD , NORA PERUMEREKU SPA DE
发明人： NAKAMATSU HIDEJI , HOSONUMA MASASHI , NISHIKI YOSHINORI , ASHIDA TAKAHIRO
IPC分类号： C25B9/00 , C25B9/08

30. 发明专利

JPH0681183A METHOD FOR PRESERVING ELECTRODE STRUCTURAL BODY 失效
公开(公告)号：JPH0681183A
公开(公告)日：1994-03-22
申请号：JP25914592
申请日：1992-09-01
申请人： PERMELEC ELECTRODE LTD
发明人： NAKAMATSU HIDEJI , SHIMAMUNE TAKAYUKI , NISHIKI YOSHINORI , SAWAMOTO ISAO , KATO MASAAKI
IPC分类号： C25B11/04 , C25B15/00
摘要： PURPOSE:To prevent the lowering in electrolysis efficiency by a shutdown and to enable the easy restart of operation by preserving an electrode structural body formed with an electrode material on the surface of ion exchange membranes while maintaining the ion exchange membranes in a dry state at the time of non-operation. CONSTITUTION:The electrode structural body constituted by using the ion exchange membranes built into an electrolytic cell as a fixed electrolyte and forming the electrode material on the surface thereof is preserved by maintaining the ion exchange membranes in the dry state at the time of non- operation. After the electrolytes in both electrode chambers are discharged, a protective voltage is applied and the moisture in the two electrode chambers is discharged to the outside of the cell. The moisture remaining on the membranes is removed by heating to about 60 deg.C and deaerating under a reduced pressure, by which the moisture content of the membranes is lowered to

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