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1. 发明专利

JP2009024186A Method and apparatus for regenerating chromium plating solution 审中-公开
标题翻译：用于再生镀铬溶液的方法和装置
公开(公告)号：JP2009024186A
公开(公告)日：2009-02-05
申请号：JP2007185268
申请日：2007-07-17
申请人： Daiso Co Ltd , Nippon Steel Corp , ダイソー株式会社 , 新日本製鐵株式会社
发明人： KIRIYAMA TADAO , NAKA HIROTOKU , YAMAUCHI SHINJI , ASADA SHIGEO
IPC分类号： C25D21/16 , C25D21/18
摘要： PROBLEM TO BE SOLVED: To solve a problem that the concentration of trivalent chromium in a plating solution discharged from a chromium plating bath is increased during the electrolysis and thereby, a part of the chromium plating solution is replaced by a fresh one to keep proper balance with hexavalent chromium, the chromium plating solution is expensive and the waste treatement of the used chromium plating solution causes environmental trouble.
SOLUTION: The plating solution discharged from the chromium plating bath is concentrated to have ≥5 g/L trivalent chromium concentration and the trivalent chromium is anodically oxidized into hexavalent chromium by the electrolysis in a diaphragm type electrolytic bath. The efficiency of the oxidation is improved and the plating solution is regenerated in the system.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题为了解决在电解过程中从镀铬浴排出的镀液中的三价铬的浓度增加的问题，由此一部分镀铬溶液被新鲜的与六价铬保持适当平衡，铬镀液价格昂贵，废铬处理方式造成环境问题。解决方案：从镀铬浴中排出的镀液浓缩至≥5g/ L三价铬浓度，三价铬通过隔膜式电解槽中的电解被阳极氧化成六价铬。氧化效率提高，电镀液在系统中再生。版权所有（C）2009，JPO＆INPIT

2. 发明专利

JPH10287998A INSOLUBLE ANODE 失效
公开(公告)号：JPH10287998A
公开(公告)日：1998-10-27
申请号：JP10011497
申请日：1997-04-17
申请人： DAISO CO LTD , NIPPON STEEL CORP
发明人： SODA KOICHI , OTOGAWA RYUICHI , YAMAUCHI SHINJI , SHIMIZU HIROKATSU , KITAIKE HIROYUKI , KASUYA AKIHIRO
IPC分类号： C25B11/06 , C25D17/10 , C25D17/12
摘要： PROBLEM TO BE SOLVED: To lessen the consumption of two sheets of insoluble anodes and to prolong the service life of these anodes by changing the amt. of the electrode active substances according to the potential difference to be impressed on the electrodes at the time of applying the electroplating on both surfaces of a steel sheet in different amts. by using two sheets of the insoluble anodes. SOLUTION: At the time of allowing the steel sheet to travel between two sheets of the insoluble anodes in the plating liquid and applying the electroplating of the different amts. on both surfaces thereof, the width of the insoluble anodes is set larger than the width of the steel sheet to be plated and both surfaces of the steel sheet are plated by giving a difference in the potential of the anodes by a difference in the plating amts. The insoluble anodes are formed by coating the surfaces of titanium substrates with iridium oxide or a compound oxide of iridium-tantalum, iridium- titanium, etc., as the electrode active substances. The coating material, of the electrode active substance on the anode surface where cathode polarization is induced by the difference in the potential between the two anodes is set at 60 g/m and the coating amt. of the electrode active substance of the anode where the cathode polarization does not arise is set at 15 to 60 g/m . As a result, the consumption of the electrode active substance by the cathode polarization of the anodes is decreased.

3. 发明专利

JPH08109490A PRODUCTION OF ANODE FOR GENERATING OXYGEN 失效
公开(公告)号：JPH08109490A
公开(公告)日：1996-04-30
申请号：JP2192095
申请日：1995-02-09
申请人： DAISO CO LTD
发明人： ENDO TAKAHIRO , OTOGAWA RYUICHI , SETO SHIGEKAZU , YAMAUCHI SHINJI
IPC分类号： C25B11/04 , C25B1/02 , C25B11/10
摘要： PURPOSE: To produce an anode for generating oxygen having excellent durability by providing the surface of a conductive base body of metal Ti subjected to surface roughening to specific roughness with an electrode active material coating layer contg. a platinum metal oxide via an intermediate layer of Ta. CONSTITUTION: The surface of the conductive metallic base body consisting of the metal Ti or its alloy and having a prescribed shape is subjected to surface roughening by a blasting treatment and is further subjected to degreasing and is formed with fine ruggedness by chemical etching treatment, by which the center line average height Ra thereof is specified to a range of 3 to 8μm. The intermediate layer consisting of the Ta or its alloy is thereafter formed by a sputtering method on the surface of the base body at a thickness of 1 to 5μm. This layer is then provided thereon with the electrode active material coating layer contg. the platinum metal oxide. A mixture composed of 10 to 97wt.% (in terms of metal) platinum metal oxide and 90 to 3% valve metal oxide of Ti, Ta, Nb, Zr, etc., is preferable as the electrode active material. As a result, the passivation of the base body is prevented and the electrode having the excellent durability even under severe service conditions is obtd.

4. 发明专利

JPH06128799A METHOD FOR CLEANING INSOLUBLE ELECTRODE AND/OR ELECTROPLATING TANK 失效
公开(公告)号：JPH06128799A
公开(公告)日：1994-05-10
申请号：JP27683792
申请日：1992-10-15
申请人： DAISO CO LTD
发明人： YAMAUCHI SHINJI , SETO SHIGEKAZU
IPC分类号： C25D21/00
摘要： PURPOSE:To safely improve the electrolytic efficiency and working environment in a short time by dissolving off the deposit on the insoluble electrode and electroplating tank with an aq. soln. of aminocarboxylic acids or alkyleneamines. CONSTITUTION:In the plating stage of a steel sheet, the deposit contg. metallic components on the insoluble electrode and/or electroplating tank is brought into contact with an aq. soln. of aminocarboxylic acids and/or alkyleneamines and dissolved off. The impurity metals such as Pb, Fe, Si, Zn, Ni, Mo, Al, Ca, Ba, Sr and Cu contained in the electrolytic bath are exemplified as the metallic components. An Sr compd. having adsorbed metallic ions is included in the deposit on the insoluble electrode. The concn. of the aq. soln. as the cleaner is preferably controlled to >= about 0.1wt.%, especially to about 1-10%, the pH to >= about 7, preferably to 9-13, and the temp. to about 10-50 deg.C. The steel sheet is dipped in the soln. for about 24-48hr and used.

5. 发明专利

JPH05156480A PRODUCTION OF OXYGEN GENERATING ANODE 失效
公开(公告)号：JPH05156480A
公开(公告)日：1993-06-22
申请号：JP6960391
申请日：1991-04-02
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
摘要： PURPOSE:To economically produce a durable oxygen generating anode by thermally spraying Ta on a Ti substrate, applying a soln. of the compds. of Ir, Ti, Nb, Zr, Sn, etc., and heating the soln. in an oxidizing atmosphere. CONSTITUTION:A wire of metallic Ta and/or its alloy is thermally sprayed on a conductive metallic substrate consisting of Ti or its alloy to provide an intermediate layer consisting essentially of the metallic Ta and/or its alloy. Arc spraying or plasma spraying is exemplified as the thermal spraying. A soln. of a metallic compd. of at least one kind among Ti, Nb, Zr and Sn and an Ir compd. and the soln. of a Ta compd. if necessary, are applied on the intermediate layer and heated at 360-550 deg.C in an oxidizing atmosphere. By this treatment, an electrode active layer consisting of >=20mol% IrO2 and the balance Ti, Nb, Zr and Sn or further at least one kind of metal oxide of Ta is formed. Consequently, passivation of the substrate is prevented, and a durable electrode is obtained with the dissolution and falling reduced.

6. 发明专利

JPH03232999A METHOD FOR REFINING PLATING BATH 失效
公开(公告)号：JPH03232999A
公开(公告)日：1991-10-16
申请号：JP2683790
申请日：1990-02-06
申请人： DAISO CO LTD
发明人： HIRAI RYUJI , IKEDA TOSHIYUKI , SHIMIZU HIROKATSU , YAMAUCHI SHINJI
IPC分类号： C25D21/18
摘要： PURPOSE:To efficiently remove iron as an impurity from an electroplating bath by using platinum metal as a catalyst and separating the resulting ferric ions. CONSTITUTION:An oxygen-containing gas is blown into a plating bath to oxidize ferrous ions contained as impurity in the plating bath. At this time, platinum metal is used as a catalyst, and the resulting ferric ions are separated. By this method, the plating bath can be refined without causing deterioration in the additive in the plating bath, and further, without causing, e.g. damage to a chelate resin in a separation stage.

7. 发明专利

JPH02233503A PURIFICATION OF HYDROCHLORIC ACID 失效
公开(公告)号：JPH02233503A
公开(公告)日：1990-09-17
申请号：JP5444689
申请日：1989-03-06
申请人： DAISO CO LTD
发明人： TAKATOMI HIROSHI , YAMAUCHI SHINJI , OGAWA KOJI
IPC分类号： C01B7/07
摘要： PURPOSE:To improve purification efficiency by dechlorinating a hydrochloric acid containing free Cl and Fe component with a specific reducing agent and/or a lowly activated carbon and contacting the dechlorinated acid with a strongly basic anion exchange resin. CONSTITUTION:Free Cl of a hydrochloric acid containing free Cl and Fe component is removed by mixing the hydrochloric acid with stoichiometric amount or less than stoichiometric amount (based on the free Cl) of a reducing agent (e.g. hydrazine, hydroxylamine hydrochloride or urea) or mixing the acid with a lowly activated carbon having a specific surface area of /g and filtering the mixture. When the free C1 concentration in the hydrochloric acid exceeds 10ppm, it is decreased to about 10ppm with the reducing agent and then further decreased to =15wt.%, Fe component existing as FeCl ion is effectively adsorbed and removed by contacting with a strongly basic anion exchange resin.

8. 发明专利

JPH0978297A PRODUCTION OF ANODE FOR GENERATING OXYGEN 失效
公开(公告)号：JPH0978297A
公开(公告)日：1997-03-25
申请号：JP23700095
申请日：1995-09-14
申请人： DAISO CO LTD
发明人： OTOGAWA RYUICHI , YAMAUCHI SHINJI , SETO SHIGEKAZU
IPC分类号： C25D17/10 , C25D17/12
摘要： PROBLEM TO BE SOLVED: To obtain an insoluble anode for generating oxygen, which is suppressed in the passivation of a base body due to the generation of oxygen, has excellent durability and is used mainly for zinc, tin or copper electroplating, the surface treatment of stainless steel and the electrolytic collection of metals by making an electrode activating material coating layer dense and uniform to prevent the infiltration of an electrolyte. SOLUTION: A water soluble binding assistant is added into a coating solution used for a coating and baking process for an electrolytic electrodes, which has an electrode activating coating layer formed by thermal decomposition method and consisting essentially of iridium oxide on the conductive metallic base body. The dense and uniform electrode activating coating layer is easily formed by using ethylene glycol, propylene glycol, polyethylene glycol, polyethylene oxide, polyvinyl alcohol, polyvinyl butylal, carboxymethyl cellulose or the like as the binding assistant.

9. 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.

10. 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

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