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1. 发明专利

DE68913020T2 未知
公开(公告)号：DE68913020T2
公开(公告)日：1994-06-16
申请号：DE68913020
申请日：1989-12-20
申请人： BABCOCK HITACHI KK
发明人： KATO YASUYOSHI , NAKAJIMA FUMITO , HAMADA IKUHISA , NITTA MASAHIRO , KONISHI KUNIHIKO , MATSUDA TOSHIAKI , YOSHIDA NAOMI , ISHIDA NOBUYOSHI , YAMASAKI HITOSHI
IPC分类号： B01D53/86 , B01J23/22 , B01J23/24 , B01J35/06 , B01J37/00 , B01J37/02 , B01J23/28 , B01J23/30
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 ratio by weight of said catalyst composition to said inorganic fibers is 3 or more; and the apparent density of said catalyst is 0.89/cm 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 500-650 DEG 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 300-650 DEG C.

2. 发明专利

AT83943T 未知
公开(公告)号：AT83943T
公开(公告)日：1993-01-15
申请号：AT88309872
申请日：1988-10-20
申请人： BABCOCK HITACHI KK
发明人： KATO YASUYOSHI , KONISHI KUNIHIKO , AKAMA HIROSHI , MATSUDA TOSHIAKI , TESHIMA NOBUE , NAKAJIMA FUMITO , MIZOGUCHI TADAAKI , NITTA MASAHIRO
IPC分类号： B01D53/94 , B01D53/86 , B01J21/06 , B01J23/28 , B01J23/30 , B01J35/00 , B01D53/36
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 = 80-96.5:3-15:0.5-5, and the size of the crystallite of the titanium oxide according to Sherrer's equation being in the range of 185 ANGSTROM to 300 ANGSTROM in the direction of a plane (101) (interplanar spacing: d = 3.52 ANGSTROM ).

3. 发明专利

DE68913020T3 未知
公开(公告)号：DE68913020T3
公开(公告)日：1998-03-05
申请号：DE68913020
申请日：1989-12-20
申请人： BABCOCK HITACHI KK
发明人： KATO YASUYOSHI , NAKAJIMA FUMITO , HAMADA IKUHISA , NITTA MASAHIRO , KONISHI KUNIHIKO , MATSUDA TOSHIAKI , YOSHIDA NAOMI , ISHIDA NOBUYOSHI , YAMASAKI HITOSHI
IPC分类号： B01D53/86 , B01J23/22 , B01J23/24 , B01J35/06 , B01J37/00 , B01J37/02 , B01J23/28 , B01J23/30
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 ratio by weight of said catalyst composition to said inorganic fibers is 3 or more; and the apparent density of said catalyst is 0.89/cm 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 500-650 DEG 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 300-650 DEG C.

4. 发明专利

DE68913020D1 未知
公开(公告)号：DE68913020D1
公开(公告)日：1994-03-24
申请号：DE68913020
申请日：1989-12-20
申请人： BABCOCK HITACHI KK
发明人： KATO YASUYOSHI , NAKAJIMA FUMITO , HAMADA IKUHISA , NITTA MASAHIRO , KONISHI KUNIHIKO , MATSUDA TOSHIAKI , YOSHIDA NAOMI , ISHIDA NOBUYOSHI , YAMASAKI HITOSHI
IPC分类号： B01D53/86 , B01J23/22 , B01J23/24 , B01J35/06 , B01J37/00 , B01J37/02 , B01J23/28 , B01J23/30
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 ratio by weight of said catalyst composition to said inorganic fibers is 3 or more; and the apparent density of said catalyst is 0.89/cm 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 500-650 DEG 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 300-650 DEG C.

5. 发明专利

JPH07256105A CATALYST FOR PURIFICATION OF EXHAUST GAS 失效
公开(公告)号：JPH07256105A
公开(公告)日：1995-10-09
申请号：JP7544394
申请日：1994-03-23
申请人： BABCOCK HITACHI KK
发明人： NITTA MASAHIRO , UEDA YOSHIKI
IPC分类号： B01D53/86 , B01D53/94 , B01J23/56 , B01J23/63
摘要： PURPOSE:To prevent the sintering of a catalyst carrier due to long-time use at high temp., the sulfurization of the carrier by SOx in exhaust gas and the active aggregation of the carrier by hot steam in a catalyst for purification of exhaust gas contg. combustible harmful components discharged from an automobile or various industrial facilities and k obtain an exhaust gas purifica tion catalyst less lowering of its activity. CONSTITUTION:A ternary multiple oxide formed from silica (SiO2), titania (TiO2) and ceria (CeO2) is used as a catalyst carrier so as to improve resistance to high temp., hot steam and SOx, and the specific surface area is increased by the combination of the plural oxides. A catalytically active component made of palladium having high heat resistance or composed of palladium and platinum is dispersedly carried on the catalyst carrier by >=1wt.%.

6. 发明专利

JPH0427433A HIGH-TEMPERATURE COMBUSTION CATALYST AND ITS PRODUCTION 失效
公开(公告)号：JPH0427433A
公开(公告)日：1992-01-30
申请号：JP13110290
申请日：1990-05-21
申请人： BABCOCK HITACHI KK
发明人： AKAMA HIROSHI , NITTA MASAHIRO
IPC分类号： B01J23/63 , B01J23/56
摘要： PURPOSE:To significantly improve heat resistance of the catalyst components at 800-1000 deg.C in an oxidative atmosphere without losing activity and to obtain long life of the catalyst in a high temp. range by depositing multiple oxide of paradium and lanthanum on a refractory inorg. carrier. CONSTITUTION:The high-temp. combustion catalyst is prepared by depositing paradium component on a refractory inorg. carrier. At the same time or after that, lanthanum compd. which produces lanthanum oxide by calcination is deposited on the carrier, and then calcined at 800-1000 deg.C in an oxidative atmosphere. The surface of the high-temp. combustion catalyst of this invention consists of paradium oxide as the catalyst component covered or surrounded with multiple oxide of paradium and lanthanum (LaxPdyOz, La2PdO4, La2PdO7). This structure stabilizes PdO and suppress movement and decomposition of PdO in a high temp. range. To obtain the heat resistance at high temp. of the catalyst, not only the presence of the multiple oxide above described is required but it is required that the catalyst component is in the form of PdO.

7. 发明专利

JPH03210008A DIESEL EXHAUST GAS PROCESSOR 失效
公开(公告)号：JPH03210008A
公开(公告)日：1991-09-13
申请号：JP290990
申请日：1990-01-10
申请人： BABCOCK HITACHI KK
发明人： ARAYA NAOMI , NISHIMURA YASUYUKI , ITO MEIJI , NITTA MASAHIRO , AKAMA HIROSHI
IPC分类号： F01N3/02 , F01N3/023 , F02B3/06
摘要： PURPOSE:To improve cost property and durability property by combining a first filter including a fine mesh and in which base metal system catalyst is held, with a second filter which holds noble metal system catalyst, and includes a rougher mesh than that of the first filter. CONSTITUTION:A first filter 3 including a fine mesh and in which base metal system catalyst is held, is combined with a second filter 2 which holds noble metal system catalyst, and includes a rougher mesh than that of the first filter 3. Thus, carbon content mainly in particulates burns efficiently by the filter 2 so as to communicate heat to other filter 3 and assist combustion of the carbon content in the particulates. On the other hand, the particulates are collected completely by the filter 3, while the carbon content in the particulates scattered under non-combustion condition is completely combustion-eliminated. Thus, since combustion of the carbon content is carried out efficiently, durability is improved, while since filter exchanging caused by clogging of ash, is carried out by exchanging only the filter 3 in which base metal system catalyst is held, so as to improve a cost property remarkably.

8. 发明专利

JPH02218436A CATALYST CARRIER AND ITS MANUFACTURE METHOD 失效
公开(公告)号：JPH02218436A
公开(公告)日：1990-08-31
申请号：JP3779589
申请日：1989-02-17
申请人： BABCOCK HITACHI KK
发明人： AKAMA HIROSHI , TOMINAGA SHIGERU , SADAKATA TOMOHIKO , YOSHIDA NAOMI , NITTA MASAHIRO
IPC分类号： B01D53/86 , B01J23/02 , B01J23/10 , B01J23/56 , B01J23/58 , B01J23/63 , B01J32/00
摘要： PURPOSE:To provide a catalyst carrier retaining a large specific surface area, free from by-products and high in heat resistance by adding barium oxide and/or lanthanum oxide to the alumina material which has previously been immersed in a nitrogen-containing basic compound. CONSTITUTION:The alumina material having a specific surface area of not less than 150m /g is first immersed in a nitrogen-containing basic compound such as ammonia, amine and pyridine to permit the alumina particles to be dispersed in such manner that Ba and La are attracted easily to their surfaces. Barium oxide and/or lanthanum oxide are then added to the alumina material in an amount of 2-8mol.% based on the alumina component. This method permits the formation of a catalyst carrier which has a high heat resistance and a large specific surface area and in which the fine particles of beta-alumina phase are highly dispersed in the alumina having a relatively large specific surface area other than the beta-alumina phase. This catalyst carrier, free from the by-products of barium aluminate, etc., is good in basicity and capable of retaining a catalyst amount of a catalyst.

9. 发明专利

JPH09276697A EXHAUST GAS CLEANING CATALYST AND EXHAUST GAS PURIFYING METHOD USING THE SAME 失效
公开(公告)号：JPH09276697A
公开(公告)日：1997-10-28
申请号：JP9266596
申请日：1996-04-15
申请人： BABCOCK HITACHI KK
发明人： NITTA MASAHIRO , MATSUDA MASAYUKI
IPC分类号： B01D53/86 , B01J23/34 , B01J23/70
摘要： PROBLEM TO BE SOLVED: To provide a halogen-resistant exhaust gas cleaning catalyst capable of effectively oxidizing and decomposing a harmful substance inclusive of an organohalogen compd., and an exhaust gas cleaning method using the same. SOLUTION: In this exhaust gas purifying catalyst cleaning exhaust gas containing a harmful compd., a first layer containing manganese oxide and zirconium or titanium oxide as catalytically active components is supported on a substrate composed of a ceramic or metal and a second layer containing cerium oxide and an oxide of one or more kind of a metal selected from among copper, iron, chromium, vanadium and tin is supported on the first layer to obtain a honeycomb catalyst. Exhaust gas is brought into contact with oxygen- containing gas at 15-700 deg.C in the presence of this catalyst to oxidize and decompose a harmful component in exhaust gas.

10. 发明专利

JPH08309183A HIGHLY HEAT-RESISTANT CATALYST AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH08309183A
公开(公告)日：1996-11-26
申请号：JP12019295
申请日：1995-05-18
申请人： BABCOCK HITACHI KK
发明人： NITTA MASAHIRO , SADAKATA TOMOHIKO
IPC分类号： B01D53/94 , B01J21/12 , B01J23/40 , B01J23/42 , B01J23/44
摘要： PURPOSE: To provide a highly heat-resistant catalyst for the burning and decomposition of combustible gas, noxious gas and odoriferous gas with a capability of maintaining a high activity for a long time of use even at high temperature. CONSTITUTION: This highly heat-resistant catalyst consists of at least, one type of metal selected from platinum(Pt), palladium(Pd) and rhodium(Rh) or their oxides as active components, borne by a porous alumina carrier, and further, an enough amount of silica to cover the alumina carrier in 1 to 4 layers, borne on the metal or its oxide. The catalyst is used at a high temperature of at least, at 1000 deg.C. Thus it is possible to maintain a high activity in the catalyst even at a high temperature over 1000 deg.C.

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