• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1534047 Exhaust gas purification catalysts ECNPK PO CHIMIA I CHIMIKOTECHNICHESKI PROBLEMI 17 May 1976 [23 May 1975] 20187/76 Heading B1E Catalysts for the oxidation of harmful constituents in engine exhaust gases comprise CuCo 2 O 4 in spinel form supported on a carrier comprising y-alumina.
    公开号:SU844038A1
    申请号:SU762359545
    申请日:1976-05-21
    公开日:1981-07-07
    发明作者:Руссев Механджиев Димитер；Божанов Пиперов Борис；Мануилов Близнаков Георги
    申请人:Ецнпк По Химиа И Химикотехническипроблеми (Инопредприятие)；
    IPC主号:
    专利说明:

    The invention relates to a catalyst for the disposal of motor waste gases, especially for diesel and gasoline engines, as well as gas-powered engines.
    A known catalyst for the purification of exhaust gases of internal combustion engines, containing 1 wt. including cobalt oxide and 3--35 weight. copper oxide 1. This catalyst allows to achieve the degree of purification from carbon monoxide at 60-67 vol. % and about 70% % of hydrocarbons at 500 ° C and a space velocity of 10,000 h.
    The closest to the invention in its technical essence and the effect achieved is a catalyst for the disposal of motor waste gases, including cobalt and supported copper oxides of alumina 2. The known catalyst contains 0.5-25 wt. % copper oxide and 0.5 to 10 weight. % oxides of cobalt and vanadium, or silver.
    Known catalyst is not sufficiently high activity and stability when working with sulfur-containing gas. Exhaust gas purification of internal combustion engines in the presence of a known catalyst at 400 ° C is 57-88%. Also, the degree of purification of exhaust gas at a flow rate of 5200 or
    11600 H-1 after the fifth hour of operation decreases by 61 vol. % for carbon monoxide and on .43 about. for hydrocarbons, i.e., a known catalyst is sensitive to contact dyes contained in waste gases, e.g. sulfur dioxide, carbon dioxide and water vapor.
    In order to increase the activity of the catalyst and its stability when working with sulfur-containing gas, a catalyst was proposed containing cobalt and copper oxides on the carrier — alumina in the following ratio, wt. %:
    Cobalt oxide4-8
    Copper oxide2-4
    CarrierEverything else
    with 90-96 weight. The% oxides of these metals are in the form of a copper-cobalt spinel.
    A distinctive feature of the invention is the specified ratio of components and the content of 90-96 weight. % of copper and cobalt oxides in the form of copper-cobalt spinel.
    The catalyst according to the invention possesses increased activity and stability when working with serosodler gas compared with the known catalyst. Thus, the degree of purification of gas in the presence of the proposed catalyst reaches 100% already at 300 ° C. In addition, the degree of purification is not reduced even at 120 hours of operation at a space velocity of 36,000 hours, i.e., the catalyst according to the invention is not very sensitive to contact points contained in exhaust gases, such as sulfur dioxide, carbon dioxide and water vapor. The catalyst was prepared as follows. On a carrier consisting of gamma-alumina, 4-8 wt. % cobalt and 2-4 weight. % copper at a ratio of 2: 1. Cobalt and copper are applied in the form of soluble salts, which decompose to oxides of SoS4 and CuO, in a fraction of 90-96 wt. % of them form copper-cobalt spinel (CuCo204). For this, aluminum gamma oxide in the form of extruded small cylinders with a length of 5-10 mm and a diameter of 3-5 mm or in the form of rollers with a diameter of 2-5 mm is poured with a solution of cobalt and copper salts. The ratio of the solution and the amount of dry carrier is 5: 1. The solution of cobalt and copper salts is a solution of nitrates. The mixture is heated to boiling point and boiled for 1.5 hours. It is then filtered and dried at 105 ° C. The dry catalyst is heated for 3 hours in air at 550 ° C. Example 1. 10 g of carrier - gamma-alumina is poured over 50 ml of copper nitrate and cobalt solution. The mixture is heated to boiling point, boiled for 1.5 hours, then filtered and dried at 105 ° C. The dry catalyst is calcined in air at 550 ° C for 3 hours. A catalyst of the following elementary composition is obtained, wt. %: copper 3.9, cobalt 7.8, aluminum 44.6 and oxygen 43.7. The catalyst contains (wt.%): 15.1 copper-cobalt spinel Ciso204, 84.3 aluminum oxide and 0.6 copper oxide and cobalt, ie, 96 weight. % of copper and cobalt oxides are in the form of copper-cobalt spinel. Example 2. 10 g of gamma-alumina poured 50 ml of a solution of copper nitrate and cobalt. The mixture is heated to boiling point and boiled for 1.5 hours. The mixture is then filtered and dried at 105 ° C. The dry catalyst is calcined with air at 550 ° C for 3 hours. A catalyst of the following elementary composition is obtained, wt. %: copper 2.7, cobalt 5.4, aluminum 47.2 and oxygen 44.7. The catalyst contains (wt.%): 10.4 copper-cobalt spinel, 89.2 alumina and 0.4 copper oxide and cobalt, i.e. 94 weight. % of copper and cobalt oxides are in the form of copper-cobalt spinel. Example 3. 660 g of gamma-alumina pour 3 liters of a solution of copper nitrate and cobalt. The mixture is heated to boiling point, boiled for 1.5 hours. The mixture is then filtered and dried at 105 °. The dry catalyst is calcined in air at 550 ° C for 3 hours. A catalyst of the following elementary composition is obtained, wt. %: copper 2.0, cobalt 4.0, aluminum 48.7 and oxygen 45.3. The catalyst contains (wt.%): 7.7 Ciso2O4, 92 alumina and 0.3 oxides of copper and cobalt. The activity of the catalyst is tested on a catalytic installation in the temperature range of 150-600 ° C at a space velocity of 36,000 hours - with four types of model gas mixtures. The composition of model gas mixtures,%: Type 1 - nitrogen 78-82, oxygen 14-17, carbon monoxide 4 and propane-butane (PB) 0.5; Type 2 - nitrogen 66-70, oxygen 14-17, carbon monoxide 4, propane-butane 0.5 and water vapor 12; Type 3 - nitrogen 61, oxygen 13, carbon monoxide 3, propane-butane 0.4, water vapor 12 and carbon dioxide 9; Type 4 - nitrogen 58-61, oxygen 15--16, carbon monoxide 4, propane-butane 0.5, water vapor 12 and sulfur dioxide 0.03-0.1. The catalyst has good catalytic activity with respect to the complete oxidation of carbon monoxide and propanabutane, both in the case of a gas mixture of type 1 and in the case of three other model gas mixtures that contain typical contact dyes — sulfur dioxide, carbon dioxide, and water vapor. The table indicates the degree of complete oxidation (%) for three temperatures.
    The kata diesel engine was tested on waste gases of two types of diesel engines, namely the WAMO 3DN and Perkins 4203, which were mounted on two standard engines. The test continued, respectively, for 240 and 60 hours of normal motor-car operation. Exhaust gases were analyzed for CO content: at the first engine at idle mileage and at the second engine - at idle mileage and at maximum revolutions. At idle run, the CO concentration in front of the catalyst is 0.83–0.25%, and after it –0.14%. At maximum speed, the measured values correspond: before the catalyst — 0.28% and after it — 0.10% CO.
    The catalyst test was also carried out with a gasoline engine on a test bed with a lead content of 0.44 g / l in gasoline. Despite the fact that lead compounds are strong catalytic dats, the catalyst showed a positive effect with a duration of 120 hours. At idle run, the CO content in front of the subsequent combustion reactor with the catalyst is 4.5–7.9%, followed by 1.8–1.5%. 4.9%. The carbon content lies in the interval (min-)
    2740-10040, after
    in front of the catalyst is 1180-6300.
    权利要求:
    Claims (2)
    [1]
    1. US Patent No. 3398101, cl. 252-466, published. 1968.
    [2]
    2. US patent No. 3447893, cl. 23-2, pub. 1969 (prototype).
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    同族专利:
    公开号 | 公开日
    DE2622319C2|1987-07-23|
    IT1065985B|1985-03-04|
    GB1534047A|1978-11-29|
    FR2311584B1|1981-12-04|
    JPS5915020B2|1984-04-07|
    DE2622319A1|1976-12-09|
    FR2311584A1|1976-12-17|
    JPS5220989A|1977-02-17|
    CS188473B1|1979-03-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS4938210B1|1970-04-28|1974-10-16|
    US3842158A|1972-04-20|1974-10-15|Union Oil Co|Exhaust gas conversion process and catalyst|
    JPS5315459B2|1972-12-09|1978-05-25|US4430315A|1981-12-28|1984-02-07|The Dow Chemical Company|Catalytic decomposition of hypochlorite using substituted cobalt oxide spinels|
    JPS6012294U|1983-07-05|1985-01-28|
    DE3729126A1|1987-09-01|1989-04-06|Mototech Motoren Umweltschutz|Diesel soot-particle filter and process for the production thereof|
    DE3731889A1|1987-09-01|1989-06-29|Mototech Motoren Umweltschutz|Diesel soot particle filter and process for the production thereof|
    DE4420932A1|1994-06-16|1996-01-11|Basf Ag|Spinel catalyst to reduce nitrogen oxide content of exhaust gas|
    BG64170B1|2002-01-24|2004-03-31|Trays Iternationaly Limited Liability Company|Catalyst for waste gas scrubbing from internal combution engines and method for its preparation|
    JP5644739B2|2011-06-24|2014-12-24|株式会社デンソー|Exhaust gas purification catalyst|
    US9314775B2|2012-01-19|2016-04-19|Toyota Jidosha Kabushiki Kaisha|Exhaust gas purifying catalyst and method for producing same|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    BG3006175|1975-05-23|
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