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公开(公告)号：JP2000072431A
公开(公告)日：2000-03-07
申请号：JP26393998
申请日：1998-09-01
Applicant: AGENCY IND SCIENCE TECHN
Inventor： CHIN RAIGEN , HORIUCHI TATSURO , OZAKI TOSHIHIKO , SUGIYAMA TOYOHIKO , SUZUKI KENJI , MORI TOSHIAKI
Abstract: PROBLEM TO BE SOLVED: To obtain an inorg. mesoporous material having superior heat resistance by bringing a mixture of silica, a template agent and an alkali into hydrothermal synthesis, discharging the reaction soln. during the synthesis, adding distilled water and carrying out the synthesis again. SOLUTION: Fumed silica, a template agent, an alkali and distilled water are mixed in a molar ratio of 1:0.25:0.2:35 and the mixture is agitated at 70 deg.C for 2 hr, aged for 24 hr at room temp., poured into an autoclave and held for 24 hr at 120-165 deg.C. Contents are drawn out from the autoclave and filtered to obtain a solid. Distilled water is added to the solid by 30 ml and this mixture is held again in the autoclave at 120-165 deg.C for 24 hr. Then, the contents are drawn out and filtered to obtain a solid and this solid is washed 5 times with distilled water, dried at room temp., heated to 550 deg.C at 1 deg.C/min rate and held for 9 hr to thermally decompose the org. substance.
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公开(公告)号：JP2000070711A
公开(公告)日：2000-03-07
申请号：JP26393898
申请日：1998-09-01
Applicant: AGENCY IND SCIENCE TECHN
Inventor： HORIUCHI TATSURO , OZAKI TOSHIHIKO , SUGIYAMA TOYOHIKO , SUZUKI KENJI , MORI TOSHIAKI
Abstract: PROBLEM TO BE SOLVED: To produce a highly heat resistant porous alumina-base catalyst carrier. SOLUTION: Silica is added to a boehmite sol, this sol is made to gel and the resultant alumina-silica gel is dried and fired to produce the objective highly heat resistance porous alumina-base catalyst carrier. The gel is dried preferably by utilizing the supercritical state of an org. solvent and the dried gel is fired preferably at 1,100-1,500 deg.C firing temp.
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公开(公告)号：JP2000005559A
公开(公告)日：2000-01-11
申请号：JP18993198
申请日：1998-06-18
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SUZUKI KENJI , HORIUCHI TATSURO , SUGIYAMA TOYOHIKO , OZAKI TOSHIHIKO , SHIBAZAKI YASUO
Abstract: PROBLEM TO BE SOLVED: To provide a method for separating carbon dioxide at high temps. using hydrosodalite. SOLUTION: When a specified gas component (carbon dioxide) is separated and recovered from a high-temp. waste combustion gas, the high-temp. waste combustion gas as such or controlled to a fixed temp. is passed through hydrosodalite to adsorb or react the component on and with the hydrosodalite, then the specified component is selectively separated by the difference between the adsorption temp. and/or reaction temp. of the specified component and the adsorption temp. and recovered. The specified component is separated and recovered in this way at high temps. without cooling the waste gas. Further, since the sensible heat of the separated and recovered specified component such as carbon dioxide is utilized in the catalytic reaction, the specified component is efficiently converted to resources at a low cost, the heat energy to be fed to the catalytic reaction is reduced, and further generation of carbon dioxide is prevented.
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公开(公告)号：JPH0925101A
公开(公告)日：1997-01-28
申请号：JP17368295
申请日：1995-07-10
Applicant: AGENCY IND SCIENCE TECHN , FINE CERAMICS CENTER
Inventor： OZAKI TOSHIHIKO , MORI TOSHIAKI , HORIUCHI TATSURO , SAKUMA KAORI , FUKUI TAKEHISA , KUBO YUKIO
Abstract: PROBLEM TO BE SOLVED: To suppress the deposition of carbon in the case of using Ni as a catalyst by adding an alkaline earth metal oxide or an alkali metal oxide as a promoter to an Ni carrying catalyst when methane is reformed with CO2 . SOLUTION: When methane is reformed with CO2 , methane-contg. gas is brought into contact with CO2 -contg. gas in the presence of an Ni carrying catalyst to which an alkaline earth metal oxide or an alkali metal oxide has been added as a promoter preferably by 1-10wt.% of the amt. of the catalyst. Magnesium oxide or calcium oxide is preferably used as the alkaline earth metal oxide. Sodium oxide or potassium oxide is preferably used as the alkali metal oxide.
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公开(公告)号：JPH1179705A
公开(公告)日：1999-03-23
申请号：JP28629797
申请日：1997-09-05
Applicant: AGENCY IND SCIENCE TECHN
Inventor： OZAKI TOSHIHIKO , HORIUCHI TATSURO , SUGIYAMA TOYOHIKO , SUZUKI KENJI , MORI TOSHIAKI
IPC: C01B3/40 , B01J23/755 , B01J35/10
Abstract: PROBLEM TO BE SOLVED: To reform methane with CO2 without deteriorating a catalyst while ensuring high activity and suppressing the deposition of carbon when Ni is used as the catalyst and to produce a metallic catalyst carried by a highly dispersing and heat resistant alumina aerogel and used in the reforming. SOLUTION: An Ni-Al2 O3 aerogel catalyst contg. nickel highly dispersed in an alumina aerogel is produced by a sol-gel process and the successive supercritical drying and a methane-contg. gas is brought into contact with a CO2 -contg. gas in the presence of the catalyst. The catalyst is produced by adding ethylene glykoxide of a metal such as nickel to a boehmite sol, converting the sol into gel with a pH control agent and them carrying out drying, firing and reduction with hydrogen.
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Patent Agency Ranking
公开(公告)号：JPH07256100A
公开(公告)日：1995-10-09
申请号：JP7972494
申请日：1994-03-24
Applicant: AGENCY IND SCIENCE TECHN
Inventor： HORIUCHI TATSURO , SUGIYAMA TOYOHIKO , MORI TOSHIAKI
Abstract: PURPOSE:To obtain a catalyst carrier stably keeping a large surface area even at high temp. and capable of being stably operated over a long pieriod of time by drying an alumina aerogel obtained by gelling a boehmite sol and subsequently baking the same. CONSTITUTION:Nitric acid is added to a boehmite sol to peptize the same to obtain a transparent sol. Urea is added to the transparent sol and, when this sol is held at a specific temp. in a hermetically closed container, it is gelled after about 6hr. The obtained gel is immediately immersed in ethanol to substitute water present in the pores of the gel with ethanol. After substitution, the gel is subjected to ethanol supercritical drying under specific conditions in an autoclave and subsequently baked for 5hr at 1100-1500 deg.C. The gel has a theta-phase even after baking and shows good phase transition suppressing effect. As a result, since an alumina carrier keeps a large surface area stably even at a high temp., it is unnecessary to frequently replace a catalyst when the catalyst is adapted to a catalytical combustion system and the lowering of the function due to the deterioration of the catalyst is prevented and an operation stable over a long period of time is possible.
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公开(公告)号：JPH06298533A
公开(公告)日：1994-10-25
申请号：JP10995393
申请日：1993-04-13
Applicant: AGENCY IND SCIENCE TECHN
Inventor： HORIUCHI TATSURO , SUGIYAMA TOYOHIKO , TAKASHIMA HIROO , YASUE KAZUO , USHIKI KENICHI
IPC: B01J13/00 , C01G23/04 , C01G23/053
Abstract: PURPOSE:To easily control the size of colloid particles and improve the quantum containment effect and transparency by diluting a titanium alkoxide with an alcohol and adding the solution to a strongly acidic water little by little. CONSTITUTION:A titanium alkoxide such as titanium isopropoxide is diluted with 5-50 times mol of an alcohol such as ethanol to obtain a dilute solution. The particle size of titanium oxide colloid can be controlled as necessary by varying the dilution degree or the concentration in the above process. The diluted solution is dropped into a strongly acidic water of pH
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8.发明专利
公开(公告)号：JPH06263435A
公开(公告)日：1994-09-20
申请号：JP7765993
申请日：1993-03-11
Applicant: AGENCY IND SCIENCE TECHN
Inventor： HORIUCHI TATSURO , MORI TOSHIAKI
Abstract: PURPOSE:To increase specific surface area at high temp. and to suppress the reduction of the specific surface area due to the transition of alpha-phase by firing alumina obtd. by thermally decomposing ammonium dawsonite and carrying out silica coating. CONSTITUTION:Ammonium dawsonite is thermally decomposed at 1,000-1,100 deg.C to form theta-alumina having /g specific surface area. This alumina is suspended in an org. solvent such as alcohol in the form of powder and tetraalkoxysilane such as tetraethoxysilane is added so as to regulate the amt. of silica added to 1.0-15wt.%. The solvent is then evaporated from the resulting suspension to obtain dry powder and this powder is fired at >=1,100 deg.C.
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公开(公告)号：JPH05245369A
公开(公告)日：1993-09-24
申请号：JP8474092
申请日：1992-03-06
Applicant: AGENCY IND SCIENCE TECHN
Inventor： MORI TOSHIAKI , HORIUCHI TATSURO , MURASE YOSHIO
Abstract: PURPOSE:To produce alumina keeping large surface area by calcining an acicular crystal of an alumina precursor coated with silica at a high temp. CONSTITUTION:An acicular crystal of carboxyaluminum ammonium hydroxide prepared by dropping an aq. solution of ammonium alum into an aq. solution of ammonium bicarbonate is coated by adding a small quantity of tetraethoxy silane on its surface and is calcined at 1300-1400 deg.C to obtain the alumina having 20-35m /g surface area.
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公开(公告)号：JP2000262902A
公开(公告)日：2000-09-26
申请号：JP7752499
申请日：1999-03-23
Applicant: AGENCY IND SCIENCE TECHN
Inventor： CHIN RAIGEN , HORIUCHI TATSURO , MORI TOSHIAKI
IPC: B01D53/94 , B01J23/84 , B01J23/889 , F01N3/10 , F01N3/28
Abstract: PROBLEM TO BE SOLVED: To provide a catalyst which can decompose and remove nitrogen oxides in a wide temp. range from 200 to 500 deg.C included in a waste gas discharged form a factory, power plant or the like or in an exhaust gas from an automobile engine such as a lean-burn engine, and to provide a method to remove nitrogen oxides from an exhaust gas by using this catalyst. SOLUTION: This catalyst to remove nitrogen oxides is prepared by supporting manganese oxide (Mn2O3) by 3 to 50 wt.% on a spinel crystalline double oxide containing nickel (Ni) and gallium (Ga). The catalyst to remove nitrogen oxides is brought into contact with an exhaust gas containing nitrogen oxides, and if necessary a reducing agent is used to decompose NO in the exhaust gas.
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