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1. 发明专利

JPH07331495A INSOLUBLE ELECTRODE PLATE FIXING PART 失效
公开(公告)号：JPH07331495A
公开(公告)日：1995-12-19
申请号：JP12999994
申请日：1994-06-13
申请人： DAISO CO LTD , KOBE STEEL LTD
发明人： ASADA SHIGEO , YAMAUCHI SHINJI , MURANAGA TOSHIO , IKEDA TOSHIYUKI , NAKAMURA SHOJI , TSUBAKINO KEIMEI
IPC分类号： C25D17/12 , C25F7/00
摘要： PURPOSE:To prevent the intrusion of electrolyte from a joint and to maintain good conductivity between both plates by fastening a bolt holding the titanium electrode plate having an electrode catalyst layer to the conductor plate through a thin layer of lead having a specified thickness. CONSTITUTION:An electrode active layer 5 is provided on the surface of a conductor substrate 6 consisting of titanium or titanium-base alloy to form an insoluble electrode plate 1. The electrode plate 1 and a conductor plate 2 supporting the plate 1 are joined through the thin layer 9 of lead or lead alloy inserted between the contact surface 8 of a boss 7 of the electrode plate 1 and firmly attached to each other by using a bolt 4. The thickness of the layer 9 is controlled to 0.04-1mm. The joining surfaces of both plates should be previously plated with platinum. The lead alloy preferably contains 0.5-10wt.% tin, indium, silver, etc., and the fastening pressure of the bolt 4 is preferably controlled to >=10kgf.cm/cm .

2. 发明专利

JPH03271386A ANODE FOR GENERATING OXYGEN AND PRODUCTION THEREOF 失效
公开(公告)号：JPH03271386A
公开(公告)日：1991-12-03
申请号：JP7104890
申请日：1990-03-20
申请人： DAISO CO LTD
发明人： IKEDA TOSHIYUKI , MURANAGA TOSHIO , OOSUMI MASAHIKO , OTOGAWA RYUICHI
IPC分类号： C23C18/12 , C23C4/10 , C25B11/04 , C25B11/10 , C25D17/10
摘要： PURPOSE:To improve the durability and catalytic activity of the title anode by depositing a mixture of the oxide of Ti, Ta, Sn, Nb or Zr with Ir oxide under prescribed conditions on the surface of a middle coating layer consisting of Ti oxide and silica formed on a metal substrate. CONSTITUTION:Ti oxide and silica are thermally sprayed on an electrically conductive metal substrate of a valve metal (alloy) to form a middle coating layer contg. a nonstoichiometric compd. represented by a formula TiOx (where x is 1.5-20). A top coating layer of a mixture of 20-70mol% oxide of a metal selected among Ti, Ta, Sn, Nb and Zr with 30-80mol% Ir oxide is then deposited on the middle coating layer by thermal decomposition. An anode for generating oxygen having superior durability and catalytic activity is obtd.

3. 发明专利

JPH02232387A OXYGEN GENERATING ANODE AND PRODUCTION THEREOF 失效
公开(公告)号：JPH02232387A
公开(公告)日：1990-09-14
申请号：JP5444589
申请日：1989-03-06
申请人： DAISO CO LTD
发明人： TOKUDA SHINGO , IKEDA TOSHIYUKI , MURANAGA TOSHIO , OOSUMI MASAHIKO
IPC分类号： C25B11/10 , C25B11/04 , C25B11/08 , C25D17/10
摘要： PURPOSE:To provide the oxygen generating anode having durability by coating the surface of an intermediate coating layer consisting of a mixture composed of specific mol% of an oxide of metal such as titanium and rhodium oxide with a mixture composed of specific mol% of an oxide of metal such as titanium and iridium oxide. CONSTITUTION:The intermediate coating layer and a surface coating layer having oxygen generating catalytic ability is formed on a conductive metallic base body. The intermediate coating layer is formed of the oxide mixture composed of 85 to 90mol% oxide of at least one kind of the metals selected from Ti, Ta, Sn, Nb, and Zr and 5 to 15mol% rhodium oxide. The surface coating layer is formed of the oxide mixture composed of 23 to 70mol% metal oxide of at least one kind of the metals selected from Ti, Ta, Sn, Nb, and Zr and 30 to 80mol% iridium oxide. The conductive metal base body is composed of the metal selected from Ti, Ta, Nb, and Zr and the alloy thereof. The anode which is hardly dissolved by electrolysis in a sulfuric acid soln. is provided in this way.

4. 发明专利

JPH0199559A STABILIZED CHLORINE DIOXIDE CHEMICAL 失效
公开(公告)号：JPH0199559A
公开(公告)日：1989-04-18
申请号：JP25813187
申请日：1987-10-12
申请人： DAISO CO LTD
发明人： OGATA SHINICHIRO , HARA KANEFUSA , IKEDA TOSHIYUKI
IPC分类号： A01N25/08 , A01N59/08 , A61L9/01 , C01B11/06 , C01B33/22 , C09K3/00
摘要： PURPOSE:To contrive a high stability in conveyance and storage, and enable an easy continuous change in the flow rate or time of generation, if necessary, in the case of using the title chemical, by depositing on sepiolite an alkaline chemical and stabilized chlorine dioxide and/or alkali salt of chlorous acid. CONSTITUTION:A stabilized chlorine dioxide chemical is prepared either by adding and mixing a mixture of an aqueous solution containing chlorine dioxide and an alkaline chemical with sufficiently dried sepiolite, or by adding and mixing an aqueous solution containing chlorine dioxide to sepiolite which has been added with an alkaline chemical. The used sepiolite is a natural mineral of magnesium silicate, and represented by formula I, it has a crystalline structure of a fiber type, and is a substance having a great surface area, provided with a number of grooves on the surface and clearances of cylindrical tunnel in the structure. An aqueous solution of a stabilized chlorine dioxide may be prepared by allowing an aqueous solution of an alkaline peroxide such as solidum percarbonate to absorb chlorine-free chlorine dioxide gas. So alkali salts of chlorous acid, either of alkali metal salts or alkaline earth metal salts may be used.

5. 发明专利

JPH0533177A PRODUCTION OF ANODE FOR GENERATING OXYGEN 失效
公开(公告)号：JPH0533177A
公开(公告)日：1993-02-09
申请号：JP1324291
申请日：1991-02-04
申请人： DAISO CO LTD
发明人： IKEDA TOSHIYUKI , YAMAUCHI SHINJI , MURANAGA TOSHIO , OTOGAWA RYUICHI
IPC分类号： C25B11/04 , C25B11/06 , C25B11/10
摘要： PURPOSE:To prevent the generation of the passivation of an insoluble anode for metal plating by thermally spraying an intermediate layer of a Ta metal on a Ti substrate, then forming a Ta2O5 layer contg. IrO2, thereon at the time of producing this insoluble anode. CONSTITUTION:The surface of an anode base body consisting of metal Ti, Ti-Ta-Nb alloy or the like is roughened by sand blasting, etc., and thereafter Ta or Ta alloy is thermally sprayed thereto as the insoluble anode for generating oxygen to be used at the time of electroplating Sn, Zn, Cr, etc., onto the surfaces of a steel sheet. An aq. soln. of a compsn. contg. 20mol% IrO2 and consisting of the balance Ta2O5 is applied on the surface of the thermally sprayed layer of the Ta metal and is heated to 360 to 550 deg.C in an oxidation atmosphere to form an electrode active layer consisting of the IrO2-contg. Ta2O5. The insoluble anode having the excellent durability is obtd. without passivation of the anode during the electrolysis or plating.

6. 发明专利

JPH0499294A OXYGEN GENERATING ANODE AND ITS PRODUCTION 失效
公开(公告)号：JPH0499294A
公开(公告)日：1992-03-31
申请号：JP21347090
申请日：1990-08-09
申请人： DAISO CO LTD
发明人： IKEDA TOSHIYUKI , MURANAGA TOSHIO , OOSUMI MASAHIKO , OTOGAWA RYUICHI
IPC分类号： C25B11/04 , C25D17/12
摘要： PURPOSE:To obtain a long-life electrode by suppressing physical dropout or chemical dissolution of iridium oxide in a first coating layer having catalytic performance for oxygen generation by using the effect of metal oxides in a second coating layer. CONSTITUTION:On a valve metal substrate there are formed a first coating layer (a) comprising a mixture oxide of 30-80mol% semiconductor iridium oxide and 20-70mol% tantalum oxide and a second layer (b) comprising metal oxide of at least one metal selected from titanium, tantalum, tin, niobium and zirconium, or repeatedly formed into several layers. If the amt. of iridium oxide in the first layer is 80mol%, adhesion property of the first layer decreases. The second layer is provided on the first layer and has the effect to reduce physical dropout or chemical dissolution of the first coating layer. Since the second layer has proper porosity, it does not decrease the catalytic effect to generate oxygen. Thereby, by providing each unit layer or several layers of these unit layers, life of the electrode can be extended.

7. 发明专利

JPH0427492A TREATMENT OF WATER 失效
公开(公告)号：JPH0427492A
公开(公告)日：1992-01-30
申请号：JP13105590
申请日：1990-05-21
申请人： DAISO CO LTD
发明人： IKEDA TOSHIYUKI , YAMAUCHI SHINJI , KIMURA SAKAE , HIRAI RYUJI
IPC分类号： C02F1/52
摘要： PURPOSE:To reduce the total org. carbon content of waste water contg. animal protein by adding a prescribed amt. of a compd. selected among prescribed salts as a flocculant to the water, heating the water after adjustment to pH>=3 and filtering off the resulting flocks. CONSTITUTION:One or more kinds of compds. selected among salts of Fe, Al, Mg, Ca and Zn are added as a flocculant to water contg. animal protein by 5-200wt.% of the total amt. of org. carbon in the protein, the water is adjusted to pH>=3 and heated to >=60 deg.C and the resulting flocks are filtered off. Waste water contg. animal protein, especially fish blood is treated with the flocculant and heated. Flocculated particles become much more filterable than particles flocculated by the conventional heating or treatment with a flocculant, the rate of removal of protein is increased, filtration is accelerated and the total org. carbon content of the waste water can be reduced to about

8. 发明专利

JPH02307590A WATER PURIFICATION METHOD 失效
公开(公告)号：JPH02307590A
公开(公告)日：1990-12-20
申请号：JP12957289
申请日：1989-05-22
申请人： DAISO CO LTD
发明人： IKEDA TOSHIYUKI , TAKATOMI HIROSHI , YAMAUCHI SHINJI , OGAWA KOJI
IPC分类号： C02F1/76 , B01D35/027
摘要： PURPOSE:To purify water safely and economically by bringing water of swimming pools or water for drinking into contact with a metal oxide, and decomposing a hypochlorite and at the same time decomposing and removing organic substances in the water either after or simultaneously with addition of the hypochlorite or chlorine to the water. CONSTITUTION:Either after or simultaneously with addition of a hypochlorite or chlorine to water to be treated, the water is brought into contact with a metal oxide having function decomposing the hypochlorite so as to decompose organic substance such as algae, microbes, phenols, etc., which are causes of malodor by oxygen generated by high speed decomposition of hypochlorite, and thus sterilization and deodorization are carried out.

9. 发明专利

JPH02282491A OXYGEN GENERATING ANODE AND PRODUCTION THEREOF 失效
公开(公告)号：JPH02282491A
公开(公告)日：1990-11-20
申请号：JP10300389
申请日：1989-04-21
申请人： DAISO CO LTD
发明人： IKEDA TOSHIYUKI , MURANAGA TOSHIO , OOSUMI MASAHIKO
IPC分类号： C25B11/10 , C25B11/04 , C25D17/12
摘要： PURPOSE:To prevent the passivation of an electrically conductive metal substrate and to obtain an oxygen generating anode having a long service life by forming an intermediate coating layer based on metallic Ta on the substrate and further forming a coating layer of an active electrode material. CONSTITUTION:A soln. contg. an org. Ta compd. such as tantalum ethylate or tantalum chloride is applied to an electrically conductive metal substrate made of a valve metal or an alloy thereof and the substrate is heated in a nonoxidizing atmosphere to form an intermediate coating layer based on metallic Ta. A coating layer of an active electrode material is further formed on the surface of the intermediate coating layer by a proper means such as thermal decomposition to produce an oxygen generating anode. The metal substrate is preferably made of Ti, Nb, Zr or a Ti-Nb-Zr alloy. The active electrode material preferably contains a Pt family metal or the oxide thereof.

10. 发明专利

JPH02179891A ANODE FOR GENERATE OXYGEN AND PRODUCTION THEREOF 失效
公开(公告)号：JPH02179891A
公开(公告)日：1990-07-12
申请号：JP33476588
申请日：1988-12-29
申请人： DAISO CO LTD
发明人： TOKUDA SHINGO , IKEDA TOSHIYUKI , MURANAGA TOSHIO , OOSUMI MASAHIKO
IPC分类号： C25B11/10 , C25B11/04 , C25D17/12
摘要： PURPOSE:To produce a durable anode for generating oxygen by successively forming an intermediate coating layer consisting of specified percentages of Pt and IrO2 and a surface coating layer consisting of specified percentages of the oxide of a metal such as Ti and IrO2 on an electrically conductive metal substrate. CONSTITUTION:An electrically conductive metal substrate of Ti, Ta, Nb, Zr or an alloy of such metals is coated with a soln. contg. salts of Pt and Ir and the coated substrate is heated at 300-700 deg.C for about 10-20 min in an oxidizing atmosphere to form an intermediate coating layer consisting of 30-80mol% Pt and 20-70mol% IrO2 by about >=3.0g/m . The substrate is then coated with a soln. contg. salts of Ir and at least one kind of metal selected among Ti, Ta, Sn, Nb and Zr and the coated substrate is heated at 300-700 deg.C for about 10-20min in an oxidizing atmosphere to form a surface coating layer consisting of 30-80mol% IrO2 and 20-70mol% oxide of the metal such as Ti and having the ability of a catalyst to generate oxygen by about 10g/m (expressed in terms of metallic Ir). An insoluble anode for generating oxygen having a long service life is obtd.

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