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公开(公告)号：US5294584A
公开(公告)日：1994-03-15
申请号：US771403
申请日：1991-10-02
申请人： Naomi Yoshida , Hitoshi Yamasaki , Ikuhisa Hamada , Yasuyoshi Kato , Kunihiko Konishi , Toshiaki Matsuda , Yuji Fukuda
发明人： Naomi Yoshida , Hitoshi Yamasaki , Ikuhisa Hamada , Yasuyoshi Kato , Kunihiko Konishi , Toshiaki Matsuda , Yuji Fukuda
IPC分类号： B01D53/86 , B01D53/94 , B01J21/06 , B01J23/22 , B01J23/24 , B01J35/06 , B01J37/02 , B01J21/08 , B01J23/16
CPC分类号： B01D53/9431 , B01D53/8628 , B01J35/06 , B01J37/0217 , B01J21/06 , B01J21/063 , B01J23/22 , B01J23/24
摘要： A process for producing a denitration catalyst comprising the following steps of immersing a base material composed of an inorganic fiber cloth in an aqueous slurry containing 5 to 20% by weight of at least one sol-form substance selected from the group consisting of silica sol, titania sol and zirconia sol, as a first component, 20 to 70% by weight of at least one inorganic oxide fine powder selected from the group consisting of those of titania, zirconia and cordierite, as a second component, and 1 to 3% by weight of at least one organic binder selected from the group consisting of polyvinyl alcohol, polyvinyl acetate and carboxymethyl cellulose, as a third component, removing superfluous liquid from the resulting base material, drying the base material, coating catalyst components onto the surface of the dried base material, and drying and calcining the resulting material, are proposed.
摘要翻译： 1.一种脱硝催化剂的制造方法，其特征在于，将由无机纤维布构成的基材浸渍在含有5〜20重量％的至少一种选自二氧化硅溶胶， 二氧化钛溶胶和氧化锆溶胶作为第一组分，20至70重量％的至少一种选自二氧化钛，氧化锆和堇青石的无机氧化物细粉末作为第二组分，和1至3重量％ 作为第三组分的选自聚乙烯醇，聚乙酸乙烯酯和羧甲基纤维素的至少一种有机粘合剂的重量，从所得基材中除去多余的液体，干燥基材，将催化剂组分涂布到干燥 基料，干燥和煅烧所得材料。
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2.发明授权
公开(公告)号：US5059576A
公开(公告)日：1991-10-22
申请号：US565211
申请日：1990-08-08
申请人： Yasuyoshi Kato , Fumito Nakajima , Ikuhisa Hamada , Masahiro Nitta , Kunihiko Konishi , Toshiaki Matsuda , Naomi Yoshida , Nobuyoshi Ishida , Hitoshi Yamasaki
发明人： Yasuyoshi Kato , Fumito Nakajima , Ikuhisa Hamada , Masahiro Nitta , Kunihiko Konishi , Toshiaki Matsuda , Naomi Yoshida , Nobuyoshi Ishida , Hitoshi Yamasaki
CPC分类号： B01J35/06 , B01D53/8628 , B01J23/22 , B01J23/24
摘要： A catalyst or a catalyst structure for removing nitrogen oxides contained in exhaust gases, having a small pressure loss and hard to cause ash deposition, and a process for producing the same are provided, which catalyst comprises a mixture of a catalyst composition of titanium oxide and at least one member of oxides of vanadium, molybdenum and tungsten, and inorganic fibers, the clearances of the inorganic fibers are filled with said catalyst composition; the ration by weight of said catalyst composition to said inorganic fibers is 3 or more; and the apparent density of said catalyst is 0.8 g/cm.sup.3 or more; and which process comprises providing a composition containing titanium oxide and at least one member of oxides of vanadium, molybdenum and tungsten, calcining said composition at 500.degree.-650.degree. C., crushing the calcined material so that powder of 20.mu. or less can occupy 90% by weight or more of the crushed material, adding water to the crushed material to form a slurry, impregnating an inorganic fiber sheet with the above slurry, placing the resulting sheet between porous molds, drying and molding it, and clacining the resulting molded material at 300.degree.-650.degree. C.
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3.发明授权Catalyst for removing nitrogen oxide and process for producing the catalyst 失效用于除去氮氧化物的催化剂和用于制备催化剂的方法
公开(公告)号：US4798813A
公开(公告)日：1989-01-17
申请号：US69305
申请日：1987-07-02
申请人： Yasuyoshi Kato , Kunihiko Konishi , Toshiaki Matsuda , Meiji Ito , Taiji Kamiguchi , Nobue Teshima , Hiroshi Akama
发明人： Yasuyoshi Kato , Kunihiko Konishi , Toshiaki Matsuda , Meiji Ito , Taiji Kamiguchi , Nobue Teshima , Hiroshi Akama
CPC分类号： B01J35/08 , B01D53/8628 , B01J29/072
摘要： A catalyst for removing nitrogen oxides whose activity deterioration due to volatile poisons contained in exhaust gases is prevented and which has a superior endurance, and a process for producing the catalyst are provided, which catalyst comprises a titania having a surface area of 20 m.sup.2 /g or less and a zeolite having 0.01 to 20% by weight of copper supported thereon; having an average pore diameter of 10 .ANG. or less; and having a silica/alumina molar ratio of 10 or more, and which process comprises mixing powder of the zeolite with the titania or its precursor, followed by molding the mixture into a predetermined shape, followed by calcining the resulting material at 800.degree. C. or higher.
摘要翻译： 可以防止排气中含有挥发性毒物而导致活性恶化的氮氧化物的催化剂，并且具有优异的耐久性，提供催化剂的制造方法，该催化剂含有表面积为20m 2 / g的二氧化钛 或更少的沸石，以及载有0.01至20重量％的铜的沸石; 平均孔径为10安培或以下; 并且二氧化硅/氧化铝摩尔比为10以上，该方法包括将沸石的粉末与二氧化钛或其前体混合，然后将混合物成型为预定形状，然后在800℃下煅烧所得材料。 或更高。
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4.发明授权
公开(公告)号：US5087600A
公开(公告)日：1992-02-11
申请号：US589452
申请日：1990-09-27
CPC分类号： B01J23/24 , B01D53/8628
摘要： A catalyst for denitration by catalytic reduction using ammonia capable of preventing catalyst deterioation due to vapors of heavy metal compounds contained in exhaust gases and having a high strength and a superior resistance to poisons and a process for producing the catalyst are provided, which catalyst comprises TiO.sub.2, oxide(s) of at least one of V, Cu, Fe and Mn and oxide(s) of at least one of Mo, W and Sn, the total of the mol number(s) of the oxide(s) of at least one of Mo, W and Sn falling within a range of 2.times.10.sup.-6 to 20.times.10.sup.-6 mol/m.sup.2 per the unit specific surface of the catalyst, and which process comprises having oxide(s) of at least one of Mo, W and Sn adsorbed and supported onto a composition comprising TiO.sub.2 prepared in advance and oxide(s) of at least one of V, Fe, Cu and Mn so as to give the above-specified total of the mol number(s) of oxide(s) of at least one of Mo, W and Sn.
摘要翻译： 提供了一种使用氨进行催化还原的催化还原催化剂，其能够防止由于废气中含有的重金属化合物的蒸气而导致的催化剂降解，并且具有高强度和优异的抗毒性和催化剂的制备方法，该催化剂包含TiO 2 ，V，Cu，Fe和Mn中的至少一种的氧化物以及Mo，W和Sn中的至少一种的氧化物，以及氧化物的摩尔数（s）为 Mo，W和Sn中的至少一种相对于催化剂的单位比表面积为2×10 -6至20×10 -6 mol / m 2的范围，并且该方法包括具有至少一种Mo，W和 Sn吸附并负载在预先制备的TiO 2和V，Fe，Cu和Mn中的至少一种的氧化物的组合物上，以得到上述规定的氧化物摩尔数的总数， 的Mo，W和Sn中的至少一种。
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公开(公告)号：US5047378A
公开(公告)日：1991-09-10
申请号：US422697
申请日：1989-10-17
CPC分类号： B01D53/865 , B01J29/072 , B01J37/04
摘要： An exhaust gas-purifying catalyst capable of carrying out the CO-oxidizing reaction and the reduction reaction of NO.sub.x with NH.sub.3 in the same reactor and with good efficiency, and a process for purifying exhaust gases using the catalyst are provided, which catalyst comprises Cu and/or Co supported by Zr oxide or Ti oxide mixed with a Cu-substituted type zeolite.
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6.发明授权
公开(公告)号：US5155083A
公开(公告)日：1992-10-13
申请号：US525535
申请日：1990-05-18
申请人： Naomi Yoshida , Hitoshi Yamasaki , Ikuhisa Hamada , Yasuyoshi Kato , Kunihiko Konishi , Toshiaki Matsuda , Yuji Fukuda
发明人： Naomi Yoshida , Hitoshi Yamasaki , Ikuhisa Hamada , Yasuyoshi Kato , Kunihiko Konishi , Toshiaki Matsuda , Yuji Fukuda
CPC分类号： B01D53/9431 , B01D53/8628 , B01J35/06 , B01J37/0217 , B01J21/063 , B01J23/22 , B01J23/24
摘要： A catalyst for reducing nitrogen oxides in the exhaust gas with ammonia, having a catalyst composition coated on an inorganic fiber cloth as a substrate is provided. The inorganic fiber cloth is impregnated with at least one inorganic oxide selected from silica and said catalyst composition, preferably with an organic binder like polyvinyl alcohol, so that the weight ratio of the inorganic oxide/said inorganic fiber cloth is in the range of 0.05 to 0.8 and the inorganic oxide is substantially placed between the fibers constituting said inorganic fiber cloth.The above inorganic fiber cloth is preferably a glass fiber cloth, more preferably a glass fiber cloth which surface is acid-treated to have a layer deficient in alumina and calcium oxide.
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公开(公告)号：US4952548A
公开(公告)日：1990-08-28
申请号：US259178
申请日：1988-10-18
申请人： Yasuyoshi Kato , Kunihiko Konishi , Hiroshi Akama , Toshiaki Matsuda , Nobue Teshima , Fumito Nakajima , Tadaaki Mizoguchi , Masahiro Nitta
发明人： Yasuyoshi Kato , Kunihiko Konishi , Hiroshi Akama , Toshiaki Matsuda , Nobue Teshima , Fumito Nakajima , Tadaaki Mizoguchi , Masahiro Nitta
CPC分类号： B01D53/8628 , B01J23/28 , B01J23/30 , B01J35/023
摘要： A catalyst for removing nitrogen oxides contained in exhaust gases, particularly those containing vapor-form catalyst poisons, by catalytic reduction with ammonia, while retaining a high denitration performance for a long time, which catalyst comprises titanium oxide as a first component, molybdenum oxide and/or tungsten oxide as a second component and vanadium oxide and/or sulfate as a third component, the atomic ratio of the respective elements being Ti:Mo and/or W:V=80-96.6:3-15:0.5-5, and the size of the crystallite of the titanium oxide according to Sherrer's equation being in the range of 185 .ANG. to 300 .ANG. in the direction of a plane (101) (interplanar spacing: d=3.52 .ANG.).
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公开(公告)号：US5151256A
公开(公告)日：1992-09-29
申请号：US673256
申请日：1991-05-02
CPC分类号： B01D53/8625
摘要： A coal combustion apparatus having prevented deterioration of a denitration catalyst due to volatile metal compounds contained in exhaust gases is provided, which apparatus comprises a combustion furnace, a denitration means for removing nitrogen oxides in an exhaust gas from the furnace by reducing nitrogen oxide with ammonia, a means for collecting ashes in the gas having left the denitration means and a means for recycling the collected ashes into the furnace, and is characterized in providing an oxygen concentration meter in the flow path of the gas between the furnace and the denitration means and also providing an oxygen concentration-controlling means relative to air fed inside the flow path of the gas from the furnace to the denitration means so as to control the oxygen concentration detected by the oxygen concentration meter to a definite value or higher.
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9.发明授权
公开(公告)号：US4966882A
公开(公告)日：1990-10-30
申请号：US201536
申请日：1988-06-02
CPC分类号： B01D53/8628 , B01J23/24
摘要： A catalyst for denitration by catalytic reduction using ammonia capable of preventing catalyst deterioation due to vapors of heavy metal compounds contained in exhaust gases and having a high strength and a superior resistance to poisons and a process for producing the catalyst are provided, which catalyst comprises TiO.sub.2, oxide(s) of at least one of V, Cu, Fe and Mn and oxide(s) of at least one of Mo, W and Sn, the total of the mol number(s) of the oxide(s) of at least one of Mo, W and Sn falling within a range of 2.times.10.sup.-6 to 20.times.10.sup.-6 mol/m.sup.2 per the unit specific surface of the catalyst, and which process comprises having oxide(s) of at least one of Mo, W and Sn absorbed and supported onto a composition comprising TiO.sub.2 prepared in advance and oxide(s) of at least one of V, Fe, Cu and Mn so as to give the above-specified total of the mol number(s) of oxide(s) of at least one of Mo, W and Sn.
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