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1. 发明专利

JP2000104199A CHROMIUM PLATING ELECTRODE 失效
公开(公告)号：JP2000104199A
公开(公告)日：2000-04-11
申请号：JP27822198
申请日：1998-09-30
申请人： PERMELEC ELECTRODE LTD
发明人： KATO MASAAKI , NARA MIWAKO , MATSUMOTO YUKIE , OGATA SETSUO
IPC分类号： C25D3/06 , C25D17/10 , C25D17/12
摘要： PROBLEM TO BE SOLVED: To minimize the generation of chromium (VI) in an anodic reaction in the chromium plating using chromium (III) and to stabilize the component of a plating bath over a long period by forming a porous layer on the surface of an electrode-material layer formed on a conductive substrate. SOLUTION: With respect to a chromium plating electrode for a chromium (III) bath, an electrode-material layer contg. iridium oxide is formed on a conductive substrate, and further a porous layer is formed on the surface of the electrode-material layer to constitute the chromium plating electrode. This chromium plating electrode is greatly characterized by having the porous layer on the electrode-material layer. An oxide contg. at least one kind of element among Si, Mo, Ti, Ta, Zr and W is used as the porous layer. Concretely, SiO2, TiO3, Ta2O5, ZrO2 and WO3 are exemplified. SiO2, TiO3 and ZrO2 are preferably used among the oxides.

2. 发明专利

JP2514032B2 失效
公开(公告)号：JP2514032B2
公开(公告)日：1996-07-10
申请号：JP11045587
申请日：1987-05-08
申请人： PERMELEC ELECTRODE LTD
发明人： MATSUMOTO YUKIE , NISHIKI YOSHINORI , HIRAO KAZUHIRO , SHIMAMUNE TAKAYUKI
IPC分类号： C25F3/02 , C25F3/04 , C25F7/00

3. 发明专利

JPH0310099A INSOLUBLE ELECTRODE FOR ELECTROPLATING AND PRODUCTION THEREOF 失效
公开(公告)号：JPH0310099A
公开(公告)日：1991-01-17
申请号：JP14298089
申请日：1989-06-07
申请人： PERMELEC ELECTRODE LTD
发明人： MATSUMOTO YUKIE , HAYASHI TAKANOBU , SUGANUMA YOSHIAKI
IPC分类号： C25D17/10 , C25D17/12
摘要： PURPOSE:To produce the above insoluble electrode having superior corrosion resistance and durability by electrically joining a porous platelike body of a corrosion resistant metal to a plate of a corrosion resistant metal to form an electrode substrate and coating the surface of the substrate with an active electrode material contg. a Pt family metal. CONSTITUTION:A porous platelike body of a corrosion resistant metal such as an expanded metal having 5-90% opening rate is electrically joined to a plate of Ti, Ta, Nb, Zr or an alloy of them as a corrosion resistant metal to form an electrode substrate. The surface of the substrate is nitride, borided or carbonized as required and it is coated with an active electrode material contg. one or more kinds of Pt family metals such as Ru, Rh, Pd, Ir and Pt, an alloy of such metals or the oxides by thermal decomposition. A superior insoluble electrode for electroplating, etc., ensuring low electrolytic voltage is obtd.

4. 发明专利

JPH0238672B2 失效
公开(公告)号：JPH0238672B2
公开(公告)日：1990-08-31
申请号：JP7802486
申请日：1986-04-04
申请人： PERMELEC ELECTRODE LTD
发明人： SHIMAMUNE TAKAYUKI , MATSUMOTO YUKIE
IPC分类号： C25B11/10 , C25B11/08

5. 发明专利

JPH01176086A ELECTRODE FOR ELECTROLYSIS HAVING DURABILITY AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH01176086A
公开(公告)日：1989-07-12
申请号：JP33369687
申请日：1987-12-29
申请人： PERMELEC ELECTRODE LTD
发明人： MATSUMOTO YUKIE , SUGANUMA YOSHIAKI , WATANABE SHIGENOBU
IPC分类号： C25B11/10 , C25B11/04
摘要： PURPOSE:To obtain an electrode for electrolysis having both resistance to passivity and sufficient durability by coating active electrode substance via a tin-base plated intermediate layer on an electrode base body formed with rugged grooves or projections having prescribed depth or more. CONSTITUTION:Ruggedness such as grooves or projections having height or depth not smaller than 50mum especially 100mum are formed on the surface of an electrode base body consisting of conductive metal such as Ti and Ta by the known means. Then an intermediate layer consisting of tin and tin alloy or those oxides is formed at about 0.5-500mum thickness on the electrode base body formed with the ruggedness on the surface by a plating method. Then after directly performing oxidative treatment on the intermediate layer or on the whole part or one part of the intermediate layer, this intermediate layer is coated with active electrode substance. As this active electrode substance, one or more kinds of metals such as Al and Ge are used. As a result, when the obtained electrode for electrolysis is used as an anode of electrolysis especially accompanied with generation of oxygen, remarkable effect is exhibited.

6. 发明专利

JP2001192874A METHOD FOR PREPARING PERSULFURIC ACID-DISSOLVING WATER 失效
公开(公告)号：JP2001192874A
公开(公告)日：2001-07-17
申请号：JP37430499
申请日：1999-12-28
申请人： PERMELEC ELECTRODE LTD
发明人： KUROSU TATEO , NARA MIWAKO , NISHIKI YOSHINORI , MATSUMOTO YUKIE , KATO MASAAKI , YAMADA KUNIAKI
IPC分类号： C01B15/08 , C25B1/28 , C25B11/12
摘要： PROBLEM TO BE SOLVED: To solve the problem that persulfuric acid ions has heretofore been prepared by oxidation of sulfuric acid ions because of non-availability of suitable oxidizing agents and the absence of means for efficient preparation thereof. SOLUTION: Conductive diamond is used as an anode 35 in preparing the persulfuric acid ions by the electrolytic oxidation of the sulfuric acid ions. Since the supervoltage of the oxygen generation reaction of diamond is extremely high, the electrolysis of a sulfuric acid ion-containing aqueous solution is substantially the persulfuric acid ion formation reaction by the oxidation of the sulfuric acid ions and the persulfuric acid dissolution water may be efficiently obtained. More particularly, when a two-chamber type electrolytic cell 31 segmented to an anode chamber 41 and a cathode chamber 42 particularly by a diaphragm 32 is used, the contact of the persulfuric acid ions once formed by the anode with the cathode and the reduction to the original sulfuric acid ions do not occur any more and current efficiency is further improved.

7. 发明专利

JPH09225470A TREATMENT OF CYAN-CONTAINING WATER 失效
公开(公告)号：JPH09225470A
公开(公告)日：1997-09-02
申请号：JP3469596
申请日：1996-02-22
申请人： PERMELEC ELECTRODE LTD
发明人： MATSUMOTO YUKIE , SEKIMOTO MASAO , YOSHIDA YASUKI
IPC分类号： C02F1/42 , C02F1/32 , C02F1/46 , C02F1/461 , C02F1/58 , C02F1/72 , C02F1/78 , C25C1/00 , C25D21/20
摘要： PROBLEM TO BE SOLVED: To recover metal and simultaneously decompose cyan and org. matter in a short time by electrolyzing a cyan-contg. water with the anode and cathode on which a DC current is applied and oxidizing the water with an oxidizing agent not producing the decomposition product other than oxygen or water. SOLUTION: A cathode 2 and an anode 3 are provided oppositely in a unit electrolytic cell 4, and the plural unit cells 4 are set in an electrolytic cell 1. The cathode 2 and anode 3 are connected to an electrolytic power source, a baffle 5 is provided between the unit cells 4 to divide the cell. The cyan-contg. water to be treated is introduced into the unit cell 4 from its cathode 2 side and discharged from the anode 3 side as shown by the arrows, electrolyzed and then oxidized with an oxidizing agent not generating the decomposition product other than oxygen or water. Consequently, the cyan and org. matter are simultaneously decomposed in a short time.

8. 发明专利

JPH05295600A 失效
公开(公告)号：JPH05295600A
公开(公告)日：1993-11-09
申请号：JP12287092
申请日：1992-04-17
申请人： NISSHIN STEEL CO LTD , PERMELEC ELECTRODE LTD
发明人： CHIYUUJIYOU NORIYUKI , OSHIMA HITOSHI , MATSUMOTO YUKIE , SEKIMOTO MASAO
IPC分类号： C23G1/08 , C25F1/06
摘要： PURPOSE:To efficently remove oxidized scales formed on the surface of various stainless steel strips subjected to continuous annealing with an air opening type annealing furnace at a high speed in a short time. CONSTITUTION:At the time of subjecting stainless steel strips to continuous descaling in such a manner that a stainless steel strip 1 is continuously passed through a stage in which electrolytic treatment is executed in an aq. soln. of neutral salt provided with plural anodes 3 and cathodes 4 and a stage in which electrolytic treatment is executed in an aq. soln. of alkali provided with plural anodes 8 and cathodes 9 in this order, and after that, it is passed through a stage in which electrolytic treatment is executed in an aq. soln. of nitric acid provided with plural anodes 8 and cathodes 9 and/or a stage in which it is immersed in an aq. soln. of nitric-hydrofluoric acid, the anodes and cathodes in each stage of electrolytic treatment are specified, and a mixed aq. soln. of sodium nitrate and alkali having 0.3 to 6mol/l sodium nitrate concn. and 2.5 to 20mol/l alkali concn. is used as the aq. soln. of alkali in the electrolysis in the aq. soln. of alkali.

9. 发明专利

JPH04116199A ANODE FOR CHROMIUM PLATING AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04116199A
公开(公告)日：1992-04-16
申请号：JP23413790
申请日：1990-09-04
申请人： PERMELEC ELECTRODE LTD
发明人： MATSUMOTO YUKIE , SEKIMOTO MASAO
IPC分类号： C25D3/04 , C25D17/10 , C25D17/12
摘要： PURPOSE:To obtain an anode having excellent durability in a Cr plating bath particularly containing organic additives by arranging plural layers of intermediate layer and surface layer of tin oxide, etc., on a basis body of bulb metal (alloy). CONSTITUTION:On the basis body composed of the bulb metal of Ti (alloy), etc., heating treatment is executed under oxidizing atmosphere after applying the solution containing tin compound to form a first intermediate layer composed of tin oxide. On the first intermediate layer, heat treatment is executed under oxidizing atmosphere after applying the coating solution containing platinum compound and tin compound or iridium compound in these to form a second intermediate layer containing the metallic platinum and the tin oxide or iridium oxide in these. Successively, further, on the second intermediate layer, the heat treatment is executed under oxidizing atmosphere after coating the coating solution containing platinum compound and tin compound having different composition from the second intermediate layer or iridium compound in these, and by forming the surface layer containing the metallic platinum and the tin oxide or the iridium oxide, the anode is manufactured.

10. 发明专利

JPH04107282A METHOD FOR REMOVING COATING FROM METAL ELECTRODE 失效
公开(公告)号：JPH04107282A
公开(公告)日：1992-04-08
申请号：JP22595790
申请日：1990-08-28
申请人： PERMELEC ELECTRODE LTD
发明人： HAYASHI TAKANOBU , MATSUMOTO YUKIE
IPC分类号： C25D17/10 , C25B11/04 , C25C7/02 , C25D17/12
摘要： PURPOSE:To simply and satisfactorily remove noble metal coating from a metal electrode, to reutilize the base metal and to efficiently recover the noble metal by applying an alkali metal hydroxide soln. to the electrode with the noble metal coating and heating this electrode. CONSTITUTION:When electrode catalyst coating of a Pt family metal such as Pt or the oxide thereof optionally contg. the oxide of a metal other than noble metals is removed from a metal electrode with the coating on the base metal made of Ti, Nb, Ta, Zr or an alloy of such metals, an alkali metal hydroxide soln. is applied to the electrode and this electrode is heated at >=300 deg.C, preferably about 500-600 deg.C for >=2min, preferably about 10min. One or more among Na0H, KOH and LiOH are used as the alkali metal hydroxide and the soln. is preferably an aq. soln. After the heating, the coating is satisfactorily exfoliated from the base metal, is easily removed by washing and can be recovered.

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