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公开(公告)号：JPH07241351A
公开(公告)日：1995-09-19
申请号：JP5990194
申请日：1994-03-03
Applicant: AGENCY IND SCIENCE TECHN
Inventor： HISANAGA TERUAKI , TANAKA KEIICHI
IPC: A62D3/176 , A62D3/30 , A62D3/38 , A62D101/20 , A62D101/22 , B01D53/86 , B01J35/02 , A62D3/00
Abstract: PURPOSE:To efficiently make a harmful organic substance harmless, under the irradiation of vacuum ultraviolet rays, by bringing the harmful organic substance into contact with a photocatalyst in the gaseous condition under the coexistance of oxygen. CONSTITUTION:A treating device is made up of a reaction tube 1, a light source 2 for generating vacuum ultraviolet rays, a photocatalyst film 3, a harmful organic substance supply pipe 4, and a discharge pipe 5 for discharging harmlessly treated substance; and an annular space A is formed between the light source 2 and the photocatalyst film 3. To treat a harmful organic substance for making it harmless, first, a vacuum ultraviolet ray generating light source 2 is operated for producing vacuum ultraviolet rays, and the photocatalyst film 3 is activated. Next, the air containing the gas of the harmful organic substance is introduced into the reaction tube 1 through the supply pipe 4 so as to be circulated inside the annular space A, and the harmful organic substance is excited and a part thereof is decomposed. Further, the decomposition of the intermediate substance produced by the decomposition is accelerated by the photocatalyst for making it harmless. The oxygen coexisting inside the annular space A is subjected to the irradiation of vacuum ultraviolet rays for producing ozone, and thereby the decomposing reaction is accelerated and maintained.
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公开(公告)号：JPH03151023A
公开(公告)日：1991-06-27
申请号：JP28928089
申请日：1989-11-07
Applicant: AGENCY IND SCIENCE TECHN
Inventor： TANAKA KEIICHI , HARADA KENJI , HISANAGA TERUAKI
Abstract: PURPOSE:To photooxidize the harmful gas and to conveniently and efficiently treat the harmful gas by irradiating the harmful gas with vacuum UV rays in the presence of air or oxygen. CONSTITUTION:A gas contg. an organochlorine-based solvent such as trichloroethylene, dichloroethane, chloroform and carbon tetrachloride, fluorocarbons such as CFC-11 and CFC-113, benzene, methyl alcohol, diethyl ether, etc., is photooxidized and decomposed in the presence of gaseous oxygen, hydrogen peroxide or an aq. soln. of the peroxides such as periodate, perchlorate and chlorate. Synthetic quartz capable of transmitting the light of >= about 200nm wavelength is used as the material for the ordinary low-pressure mercury lamp as the vacuum UV source. Internal irradiation and external irradiation are used as the photoirradiation method. The irradiated acidic gas is passed through aq. alkali and removed. The harmful gas is conveniently and efficiently treated by this method.
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公开(公告)号：JPS6457763A
公开(公告)日：1989-03-06
申请号：JP21588587
申请日：1987-08-28
Applicant: AGENCY IND SCIENCE TECHN
Inventor： TANAKA KEIICHI , MURATA SHIGEO
Abstract: PURPOSE:To obtain a photoelectric conversion film having a preferable photoelectric converting function by electrolytically polymerizing specific organic complex or doping specific organic complex in conductive polymer. CONSTITUTION:It is formed of an electrolytically polymerized film of ruthenium or osmium complex A of 5-aminophenanthroline or by doping ruthenium complex (complex B) of vasophenanthroline sulfonic acid in conductive polymer. When electrolyte of potassium chloride, lithium chloride or sodium chloride is so added to aqueous solution of the complex A that its concentration become 0.1mol/l or more, an operating electrode, its opposite electrode and a reference electrode are dipped, a potential is scanned at a predetermined potential of 1.0-1.7V vs. SCE or 0-1.7V vs. SCE to be electrolyzed, yellow-brown thin films are formed on the electrodes. The operating electrode employs platinum or nesa glass, the opposite electrode preferably employs platinum, and the reference electrode can employ saturated calomel electrode. When the complex B is added to the aqueous solution of dimethylaniline containing electrolyte and electrolyzed, a conductive film doped with the complex B is obtained.
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Patent Agency Ranking
公开(公告)号：JPH06328068A
公开(公告)日：1994-11-29
申请号：JP14135793
申请日：1993-05-20
Applicant: AGENCY IND SCIENCE TECHN
Inventor： TANAKA KEIICHI , HISANAGA TERUAKI
Abstract: PURPOSE:To improve a decomposition removal rate and, at the same time, facilitate the separation recovery of a photocatalyst by using the photocatalyst which decomposes and removes a harmful substance in waste water by emission of a light in a powder form and supplying a treated water in a treatment tank to a storage tank through a filter, and then recirculating it to the treatment tank. CONSTITUTION:When treating a waste water, first, a treatment tank 1 is filled with pulverized photocatalyst and the waste water is supplied from a waste water feeder pipe 4. Next, a circulation pump 3 is activated to circulate waste water from the treatment tank 1 through pipings 7, 8. Thus, the waste water is stirred to disperse and suspend the photocatalyst in the waste water. In addition, a light emitting lamp 2 is flashed to emit a light into the waste water. Subsequently, the photocatalyst is allowed to precipitate in the waste water, than a drain pump 9 is activated to send under pressure a supernatant (treated water) to a storage tank 11 from the treatment tank 1 through a drain pipe 6 and a filter 10. Then the drain pump 9 is reversed, after the water level of the treatment tank 1 comes down to a position of a water level sensor 12, and the treated water in the storage tank 11 is flowed back to the treatment tank 1. Consequently, the photocatalyst is recovered.
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公开(公告)号：JPH05337469A
公开(公告)日：1993-12-21
申请号：JP17386392
申请日：1992-06-08
Applicant: AGENCY IND SCIENCE TECHN
Inventor： TANAKA KEIICHI , ABE KEIJI , HISANAGA TERUAKI
IPC: B01J21/06 , B01J23/06 , B01J23/30 , B01J35/02 , C02F1/32 , C02F1/72 , C02F1/76 , C02F1/78 , C02F9/00
Abstract: PURPOSE:To shorten the irradiation time and to completely decompose the harmful material into carbon dioxide and other inorg. material by oxidizing waste water and then irradiating the water with light in the presence of a semiconductor catalyst. CONSTITUTION:Waste water is previously oxidized and then irradiated with light in the presence of a semiconductor catalyst to decompose the harmful material. The waste water is oxidized by ozone, hydrogen peroxide or chlorine and then irradiated with UV. semiconductor powders are then suspended in the pretreated water or the water is brought into contact with a membrane on which the semiconductor powder is immobilized, and the waste water is irradiated with light directly or through a glass vessel. A lamp with the emitting light contg. UV and a part of visible light is used as the light source.
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公开(公告)号：JPH0596180A
公开(公告)日：1993-04-20
申请号：JP28370591
申请日：1991-10-03
Applicant: AGENCY IND SCIENCE TECHN
Inventor： HISANAGA TERUAKI , TANAKA KEIICHI
Abstract: PURPOSE:To obtain a fixed photocatalyst to dispose a harmful material in a waste water. CONSTITUTION:A semiconductor powder becoming to be a photocatalyst is prepared in a fiber or a porous carrier and is burned to obtain a photocatalyst- fixed film controlled in the crystal form. This photocatalyst-fixed film is immersed in a waste water and is irradiated with ultraviolet rays and a visible light under stirring the waste water. By this method, the recovery of the catalyst is from the waste water to be treated can be unnecessary and waste water treatment can continuously be carried out.
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公开(公告)号：JPH0194998A
公开(公告)日：1989-04-13
申请号：JP25139687
申请日：1987-10-05
Applicant: AGENCY IND SCIENCE TECHN
Inventor： TANAKA KEIICHI , HISANAGA TERUAKI , HARADA KENJI
Abstract: PURPOSE:To decompose harmful substances in waste water, by irradiating a semiconductor with light in the presence of an oxidizing agent. CONSTITUTION:A polymer filter such as a membrane filter is packed with a semiconductor powder and immersed in waste water along with an oxidizing agent such as hydrogen peroxide or hypochlorite. Next, this waste water is irradiated with light using a high pressure mercury lamp, a xenon lamp or a halogen lamp. By this method, a radical is generated and reacted with an org. substance to decompose the same. By this method, the org. substance can be perfectly made harmless.
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公开(公告)号：JPS6219245A
公开(公告)日：1987-01-28
申请号：JP15952485
申请日：1985-07-19
Applicant: AGENCY IND SCIENCE TECHN
Inventor： TANAKA KEIICHI , HISANAGA TERUAKI , HARADA KENJI , MURATA SHIGEO , MASUDA HITOSHI
Abstract: PURPOSE:To facilitate separation of semiconductor colloid from a reaction system after completion of the reaction and to enable conduction of continuous reaction by combining an optically functional film with a fluidized bed reaction vessel by forming an optically functional film by supporting semiconductor colloid on a porous film. CONSTITUTION:Optically functional film is prepd. by filtering repeatedly soln. of semiconductor colloid having particle size distribution close to the pore size of porous film through the porous film to support the colloidal fine particles of the semiconductor on the porous film. In this case, the colloidal soln. of the semiconductor is obtd. by forming colloidal soln. of a semiconductor compd. in accordance with a synthetic method for the semiconductor, and allowing the particles to grow by heating and aging the soln. A metal can be further supported by the optically functional film if necessary in order to improve the catalytic effect of the semiconductor. Suitable metals to be supported are Pt, Pd, Rh, Ru, Ir, etc.
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