• 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:
    A three-way catalyst is described for the purification of automobile exhaust gases formed of an active substance of platinum and rhodium and possibly base metal(s) at a certain weight ratio between the two noble metals and at a certain atomic ratio between the noble and the base metal, which are precipitated onto active aluminum oxide containing certain quantities of CeO2, ZrO2 and Fe2O3, and whereby the catalyst is obtained by impregnating active aluminum oxide, possibly stabilized with alkaline earth metal, with a solution of cerium, zirconium and iron salt which is thereupon calcined in air at 500 DEG -700 DEG C. and then treated after application of an impregnation of salts of the active substance components in a gas current containing hydrogen at temperatures below 650 DEG C.
    公开号:SU1170958A3
    申请号:SU802864199
    申请日:1980-01-08
    公开日:1985-07-30
    发明作者:Боцон Альфред；Коберштайн Эдгар；Плетка Ханс-Дитер；Фелькер Херберт；Лакатос Эдуард
    申请人:Дегусса Аг (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to a catalyst for purification of exhaust gases of internal combustion engines and a method for its preparation, in particular to catalysts that simultaneously contribute to the oxidation of carbon monoxide and hydrocarbons and the reduction of nitrogen oxides in the exhaust gases of internal combustion engines, as well as to the use of these catalysts.
    The purpose of the invention (; nor is the activity of the catalyst due to promoters.
    FIG. Figure 1 shows schematically the installation used for the technical testing of the proposed catalysts, having a motor 1, the preparation of the mixture for which is regulated by the regulating device 2. The regulating device 2 receives its parameters from the oxygen probe 3, which is located in the exhaust gas flow of the motor. The exhaust gases are then passed through a test chamber with a catalyst 4, and before and after this chamber samples can be taken, which are fed to analyzers 5. On the recorder 6, the results are recorded
    FIG. Figure 2 shows the dependence of the conversion on the ratio of air: fuel A; F; in fig. 3 - the width of the window with certain compositions of the catalyst is achieved with respect to 80.85 and 90% conversion of CO and NO; in fig. 4 - shift the optimal operating point of the catalyst in the region of low concentrations, depending on the specific composition of the catalyst; in fig. 5 - signal of the measuring probe for oxygen before and after the three-directional (trifunctional) catalyst at high air ratio: fuel L - 0.9677-0.9992; in fig. 6 - signal of the measuring probe for oxygen before and after the three-directional (trifunctional) catalyst with a low ratio of air: fuel L = 1.0037-1.0175.
    Example 1 (comparative). A structural, honeycomb-shaped cordierite enhancer (700 g) is washed several times with a 30% aqueous gamma-alumina dispersion, it is between separate washing processes, and 180 g of AljO is applied.
    After that, the substance is kept at 120 ° C ((3 h) and then calcined: 900 ° C (1 h). After cooling the coatings with a substance carrier, cordierite cells are treated with aqueous solutions of cerium and zirconium nitrate so that after the substance and calcination 7.5 g of cerium oxide and 10 g of zirconium oxide (15.8 g of cerium nitrate and 26.2 g of zirconium nitrate were left in the AljOj layer at 60 ° C for 60 min.) After that, the coated amplifier was immersed in an aqueous solution of hexachloroplatinic acid , rhodium chloride and aluminum nitrate (3.8 g HjPtCl; 0.73 g PhCl: 8.25 g AUNOg) and with tub for 12 hours. The total content of the noble metal after this treatment is 2.16 g with the Pt: Ph ratio of 5: 1, the aluminum content of 1.08 g in relation to the weight ratio of the noble metal to non-precious 2: 1. The salts of the noble metal precipitated on the carrier material are reduced in a stream of hydrogen at 500 ° C for 1 hour. The BET surface area of the catalyst prepared in this way is 15-20.
    Example 2 (proposed catalyst). A honeycomb-shaped 1D cordierite amplifier (700 g) is coated as in Example 1 with 180 g of gamma-oxide a; mention it, dried at 120 ° C and calcined at 500 ° C for 1 hour. Instead of normal alumina, (Kotor with the addition of Ca ions (5.4 g CaO) gets additional stabilization.
    The body prepared in this way is then treated with an aqueous solution of cerium acetate, zirconium acetate and iron nitrate (12 g of GeOg from 22 g of cerium acetate 111; 12 g of ZrO from 32 g of zirconium acetate; 12 g of 36.3 g of FefNO), ) so that after drying and calcining at 700 ° C for 60 minutes, the deposited layer contained 6.6% cerium oxide, 6.6% zirconia and 6.6% iron oxide, respectively, based on the amount of alumina introduced
    The impregnation of the carrier substance with a noble metal (Pt: Ph) and aluminum wire as in Example I, so that again 2.16 g noble metal is used as the active phase for Pt: Ph - 5: 1 and. 1.08 g of aluminum in accordance with the weight on-weighing of the noble metal and unprotected metal 2: 1. The BET surface area of catalyzed 18-24 catalyzed in this way.
    Three more samples of the proposed catalyst were made in the same way and with the same distribution of noble and non-precious metals. Only the composition of the oxide layer acting as a carrier of the active phase varies:
    a) 4.2% 5.6% 1%
    b) 4.2% 5.6% 2%
    c) 4.2% 5.6% 4% FejO based on the amount of alumina introduced. The amounts of the composition and: 7.5 Ogr from 13.8 g of cerium acetate 111; 10.0 f ZrOjHS 26.6 g. Zr acetate 5.4 g. Pe (NO) h. ZrOj as in the composition of 10.8 g of Fe (NO,),. Entered amounts to the composition and ZrO ,, as in the composition of 21.6g. Re (MO) h. Example. 3. The catalysts prepared in accordance with examples 1 and 2 are checked into the exhaust gas flow of an internal combustion engine, or with an external ignition of FIG. 1, on a triple-function catalytic activity. The test parameters are as follows: 4-cylinder engine with non-fuel injection with Bosh-K-Dzhetronik; dynamic test, frequency 1 Hz; (range of bath is ± 0.068; exhaust gas temperature 450 ° C; volumetric velocity 75,000 aging of the catalyst; engine 150 h; h (test range 0; 975-1.008. Before the catalyst, the following composition of VYHLOPN1.1X gases is measured: СО3-1 , 5 vol. 7g NS, 380-300 ppm, 2400-1700 ppm 1.7% by volume 10-12% by volume The results of these studies, together with the results of the comparative catalyst, are presented in Table 1, conversion, - f (). The mean values from two samples are given in Table I. The addition of iron oxide, together with cerium oxide and zirconium oxide to alumina, significantly changes the dynamic The proposed catapi: mash versus catalysts containing only cerium / zioconium oxides A. Figure 2 shows the conversion of CO, HC, and NO catalysts used in Example 1 or 2 as a function of the air: fuel ratio. the intersection of the CO / MO curves of the conversion at the proposed catalyst shifts to lower values by 41 0.015, which allows the engine / catalyst system to work with a lean mixture and leads to lower fuel consumption. But if the catalyst is supplied with depleted exhaust gas, it works better, resulting in a reduction of especially critical emissions at the start of engine start. As can be seen from the table. 1 and FIG. 2, the degree of conversion of CO and N0, when using pred 584 lagged catalyst is increased, which leads to a further decrease in environmental pollution. B. From FIG. 3, it is possible, as certain compositions of the proposed catalysts, to change or extend the limit of the 1-window, which indicates the degree of conversion of CO and NOx at a certain degree of conversion of hydrocarbons, which is a measure for the range of application of the catalysts. With an increasing content in the proposed catalyst, the components of iron oxide in the l-window, in contrast to the comparative catalyst, are significantly expanded. In fng. 4 shows the shift of the optimum operating point of the catalyst to a low range depending on the specific compositions of the proposed catalyst according to the invention, as follows from the curve, the optimum mixing is achieved when the content of the iron oxide component is 2-6% based on the alumina introduced. In the operation of the comparative catalyst (Example 1) in the required area to achieve satisfactory conversion (rj 0,983-0,487), the measuring oxygen probe 3 in FIG. 1 is loaded with bold exhaust gas. As can be seen from FIG. 5, as a result of this, the probe signal is distorted. FIG. 5 and 6 shows the probe signal before and after the catalyst on which hydrogen contained in the exhaust gas and a portion of carbon monoxide are converted (these harmful substances affect the probe signal). Compared to the probe signal after the catalyst, which may be considered normal, the probe signal in front of the catalyst in FIG. 5 is not fully expressed in the field of catalyst control. As a result, the voltage of the probe jumps over the system control area, which leads to excessive fluctuations in the formation of the mixture and, thus, to a higher emission. When using the catalyst prepared according to the invention, it is possible to ensure engine operation with a leaner mixture (h - 0.998-1.005). In this region, the probe signal, as can be seen from FIG. 5 and 6, is expressed much better. As a result, the overall control system works more precisely, and the catalyst is loaded with the composition of abixnof gases that is required for optimal conversion. Consequently, emissions are significantly reduced. Due to the envisaged quantitative measurement of additional elements to the carrier material of the proposed catalyst, it is possible to reconcile the most favorable operating point of the catalyst with the optimum operating principle of the engine.
    Example 4. A. Catalysts prepared in accordance with examples 1 and 2 are tested in the exhaust gas stream of an internal combustion engine with foreign ignition for their ability to convert depending on the temperature of the exhaust gases. The test parameters are as follows: 4-cylinder engine with direct fuel injection with Bosch-K-Jetronic; 4-1.0026; exhaust gas temperature 200-45 ° C; space velocity of 75,000 hours old (catalyst: engine 150 hours, about 0.995 hours. The following exhaust gas composition is measured before the catalyst: CO0.45% by volume of HC260 ppm 3000 ppm 0.46% by volume 15.0% by volume 0 , 45 vol.% 260 ppm 3000 MD D. 0.46 vol.% 215.0 vol.% B. The catalyst prepared according to example 2 is examined in the exhaust current of an internal combustion engine with spark ignition for its ability to convert Depending on the temperature of exhaust gases at various ratios, the air: fuel. Test parameters are as follows: 4-cylinder pump-carburetion engine with Bosch Cjetronic; - 09826; 0.9930; 1.0024; exhaust gas temperatures of 200–450 ° C; volumetric velocity of 75,000 h. As can be seen from Table 2, the point at which the temperature jump began, i.e. 50% conversion is achieved with all three components of harmful substances. In Table 2, conversion f (exhaust gas temperature) shows the average of two samples, B. The catalyst prepared in Example 2 is examined in exhaust gas flow from an internal combustion engine with foreign ignition to its ability to convert dependencies on the temperature of the exhaust gases at different ratios of air: fuel. The test parameters are as follows: 4-cylinder engine with direct fuel injection with Bosh-K-Dzhetronik; h - 0.9826; 0.9930; 1,0024; exhaust gas temperature 200 - volumetric speed of 75,000 hours; catalyst aging: engine 150 h f |, about 0.995.
    Before the catalyst, the following exhaust gas compositions are measured: CO,% vol. 0.92 0.670.46
    NS, pcs269245265
    2370
    2430
    2990
    ppm
    About5g 0,46 0,36
    0.40
    about.%
    14.75 15.0
    14.95
    p - 0.9826 p- 0.9930
    , - 1.0024 This example clearly shows how the starting points of the temperature jump for the CO and HC catalyst as a result of a shift in the air: fuel ratio in the lean region receive lower values, since there is more oxygen for the conversion. The results of this series of tests are given in table. 3, where the conversion is f (exhaust gas temperature at different values). Example 5. The catalyst is prepared according to examples 1 and 2, with the exception that instead of aluminum in the active phase there is nickel in a 4: 1 weight ratio between non-noble and noble metals . Amount entered: 8.64 g Nt from 26.8 g Ni (MO j). The test results are the same as described in examples 3 and 4. Example 6. A structurally shaped, honeycomb amplifier made of heat-resistant, scale-resistant iron containing aluminum and chromium metal alloy (1000 g) is heated to create a reinforcement-friendly surface. oxygen-containing gas for 3 hours at 950 ° C and coated with a catalytically active substance in the same sequence as in Examples 1 and 2. The amplifier covers 180 g of active alumina, which contains 4 g of cerium oxide and 6 g of zirconium oxide in a comparative catalyst and 4 gcerium oxide, 6 g of 1Shrconi oxide and 5.4 g of iron oxide in the proposed catalyst. The active phase is composed of 1.64 g of noble metal in the ratio of Pt Ph 5: 1 and 0.85 g of aluminum. The test results on the engine test bench are the same in trend as the results obtained in examples 3 and 4. Example 7. The 2 l carrier material in the form of molded active aluminum oxide material with a bulk weight of about 0.5 kg / l is divided into two parts. One part (500 g) is impregnated with a solution of Ce / Zr salts in accordance with the content of 4.7 g of cerium oxide and 13.3 g of zirconium oxide (4.7 g of cerium oxide from 8.5 g of cerium acetate are introduced 111 and 13.3 g ZrO2 from 35.4 g of zirconium acetate), another part (500 g) is impregnated with a solution of Ce / Zr / Fe salts in accordance with the content of 4.7 g of cerium oxide, 13.3 g of zirconium oxide and 7.5 g of iron oxide (enter but with respect to the compounds of cerium and zirconium, the indicated amounts and relatively, 7.5 g from 22.5 g of Pe (MOz) 3). After drying at 50 ° C (4 hours) and calcining the thus treated bulk for one hour at 700 ° C, the active phase is applied to the bulk material by contacting with an aqueous solution of hexachloroplatinic acid and chloride for 111 with a Pt: Ph ratio of 10: 1 ( 0.364 g of Pt from 0.768 g, 0.0364 g of Ph from 0.073 g of PhClj) were introduced in such a way that 0.4 g of a noble metal were in each part. After drying at 150 ° C (12 h), both catalysts are subjected to a one-hour reduction treatment with hydrogen at 550 ° C. Test results are the same as described in examples 3 and 5. Example 8. Comparative and proposed catalysts are prepared according to the recipe of examples 1 and 2. However the alumina slurry is mixed with a mixture of oxides of cerium, zirconium or cerium, zirconium and iron before applying to the structural enhancer so that, after annealing at 70 ° C, the compositions indicated in these examples are relative to their oxides. The process is then carried out as in Examples 1 and 2. The results are the same as in Examples 3 and 4. Example 9 (comparative). The catalyst is prepared as described in Example 1. Only the Pt: Ph ratio varies over a wide range, all other weight data and relationship data remain unchanged. The ratios of the noble metal are as follows: a) Pt: Ph 2: 1 of 3.04 g and 1.46 g of PhClj b) Pt: Ph 5: 1 of 3.80 g - and 0.73 g of PhCl, c) Pt: Ph 11: 1 of 4.18 g - - and 0.37 g of PhCI g) Pt: Ph 19: 1 of 4.33 g - - and 0.22 g of PhCI Recovery of the noble metal salts deposited on the nose material is made by molding gas (5% H residue Nj) at a temperature of 600 ° C for half an hour. The BET surface area of the catalyst prepared in this way is 15-20. Example 10 (proposed katali: ptor). The catalyst is prepared as described in Example 2. Only the Pt: Ph ratio is changed in the same range as in Example 9. The weight data and relationship data, as opposed to Example 2b, remain the same. The ratios of the noble metal are as follows: a) Pt :: Ph 2: 1 of 3.04 g and 1.46 g of PhCl b) Pt: Ph 5: 1 of 3.80 g - - and 0.73 g of Phd c) Pt: PH 11: 1 of 4.18 g -. - and 0.37 g PhClj g) Ft; Ph 19: 1 of 4.33 g - - and 0.22 g of PhClj. The reduction of the noble metal salts deposited on the carrier material is produced by molding gas at a temperature of 600 (within half an hour. The BET surface area of the catalyst prepared in this way is 18 -24. Example 11. KatanH3aTOpbi prepared according to examples 9 and 10 is tested in an exhaust stream of an internal combustion engine with an external ignition with an arrangement as described in Fig. I. for their three-functional catalytic activity. The test parameters are as follows: 4-cylinder engine with direct injection of fuel with Bosch-K-Dzhetronik; dynamic test: frequency 1 Hz, 0.995; 1 (vibration range) ± 0.068; exhaust gas temperature 450 ° C; volume velocity 750,000 h:, catalyst aging: engine 150 g. the catalyst measures the following exhaust gas composition: CO2 = 2.55 vol.% HC355 ppm NO 1820 ppm O21.84 vol.%, 5 vol.% The results of the studies with the proposed analyzers of example 10, together with the comparative catalysts of example 9, are given in table. 4 (the average value of 3 two samples). Here again, it is confirmed that the npe / uiarae catalyst, as in Example 3, is significantly superior to the comparative Koireepium NO and even at the ratio of Pt: Ph 19: 1 there is an acceptable conversion of NO. Data on the composition of the catalysts according to the quoted examples are given in table. five.
    ten
    1170958
    Table 1
     The exhaust gas temperature is 450 ° C.
     Exhaust gas temperature 450С.
    atalis
    Co,% op for example
    I
    a lOa
    94,089,3
    92.6 87.5 96 106 89.4 84.7 9v 10v 89.0 80.5 9g 10t 87.5
    0,008
    0.016
    table 2
    About 1 CO 1 CO
    one
    I мlmks
     Emergency
    X
    ,eight
    QT.F
    94.5 93.1 7.8 93.1 95.5 92.3 96.7 96 92.1 95.6
    Table
    NOj (,%
    NA,%
    90.9
    89.0 98.1 78.3 89.3 86.3 89.3 67.5 84.6 80.2 90.2 56.5 84.1 77.6 91.6
    Table 5
    AL window width
    0.060, 050, 04D CeOg, ZrOt GeO2.2gOg
    Q Ce Og, ZrO g% fCfffj CeO, ZrOg- 4% fefO3 B CeOg, ZrOt 6.6% fsgQj
    0.030, 020 .078
    U
    “2
    ± ma
    80, 85 and 90%, cmefje d / jpeSpau enuJi CO, Oxi / f C Fig. 3 Contents of RegOz () 0,980 0,9650,990. 4 AL - a075 o- CO / NOx 0 / n7 mM nal mffi / a, 995
    BeforeAfter
    f (cfmo / n / 3o / rfo / ooft ffa / rfo ajff 7Ofla
    . s ora / Kama / rifjcfmopa
    1170958
    After
    .ffff
    L - /, OP5
    ,at 7
    L - 1, OP6
    Sz
    A / f- G4, 785
    L 1,0058
    , 7s
    L - f, ffffJ7
    FIG. 6
    权利要求:
    Claims (2)
    [1]
    1. The catalyst for purification of exhaust gases of internal combustion engines containing metals of the platinum group, cerium dioxide and zirconium dioxide, a promoting additive on a carrier - alumina, which is a molded bulk material or deposited on a monolithic cordierite structural amplifier in an amount of 5-
    15 wt.%, Characterized in that, in order to increase the activity of the catalyst, it contains platinum and rhodium as a metal of the platinum group, nickel or aluminum and, additionally, iron oxide as a promoter, and gamma-alumina as a carrier, if necessary 2.4-2.6 wt.% calcium oxide, with the following ratio of components, wt.%:
    Platinum 0.69-0.99
    Rhodium 0.052-0.346
    Cerium Dioxide 2.2-5.45
    Zirconium dioxide 3.3 -5.45
    Iron oxide 1.8-5.45
    0.5 aluminum or
    Nickel 3.8
    Gamma-alumina The rest with platinum and rhodium in a mass ratio of 2.0-19.0: 1, cerium dioxide and zirconium oxide in a mass ratio of 1: 1-2.8, platinum and rhodium in aluminum in a mass ratio 1.8-2.1: 1, platinum and rhodium to nickel - in a mass ratio of 1: 4.
    [2]
    2. A method of producing a catalyst for purification of exhaust gases of internal combustion engines by impregnating gamma alumina with aqueous solutions of cerium and zirconium salts and drying or mixing gamma alumina with oxides of these elements, then calcining in air followed by treatment of the support with aqueous solutions of the group metal salts platinum, drying and calcining, characterized in that, in order to obtain a catalyst with increased activity, when impregnated pre-stabilized if necessary calcium oxide, gamma alumina with aqueous solutions of cerium salt and zirconium salt solution is administered additionally. iron or when mixing the oxides of these metals, iron oxide is added, calcination is carried out at 700 ° C for 1 h, then, when the support is treated with metal salts of the platinum group, an additional solution of aluminum or nickel salts is added, and at the last stage the catalytic mass is treated with a hydrogen-containing gas at 500–600 ° C.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1170958A3|1985-07-30|Catalyst for cleaning internal combustion engine exhaust gases and method of producing same
    KR970000638B1|1997-01-16|Catalyst for cleaning the exhaust gases for internal-combustion engines
    US4957896A|1990-09-18|Catalyst for purification of exhaust gases
    CA1083124A|1980-08-05|Polyfunctional catalysts and method of use
    JP2659796B2|1997-09-30|Exhaust gas purification catalyst and method for producing the same
    US4504598A|1985-03-12|Process for producing honeycomb catalyst for exhaust gas conversion
    US4927799A|1990-05-22|Catalyst for the purification of exhaust gas
    KR0169112B1|1999-01-15|Catalyst for cleaning exhaust gases from combustion engines
    US6413483B1|2002-07-02|Catalytic converter for a lean burn internal combustion engine
    KR970000296B1|1997-01-08|Platinum-free three-way catalyst
    EP0393612B1|1996-05-29|Rhodium-free, palladium and platinum containing catalyst supported on zirconia and/or lanthana stabilized ceria
    RU2214861C2|2003-10-27|Oxygen-accumulating material with high thermal stability and method for its preparing
    US3895093A|1975-07-15|Catalytic removal of carbon monoxide, unburned hydrocarbons and nitrogen oxides from automotive exhaust gas
    JP4833453B2|2011-12-07|Exhaust gas purification catalyst and its production and use
    HU202425B|1991-03-28|Method for producing rhodiumless catalyzers suitable for simultaneous modifying carbon monoxide, hydrocarbons and nitrogen oxide being in the exhaust gases of internal combustion engines
    KR19990078338A|1999-10-25|A process for operating an exhaust gas treatment unit containing a sulfur trap and nitrogen oxides storage catalyst
    EP1857170B1|2009-02-18|Exhaust gas purification catalyst
    BRPI0713882A2|2012-11-06|three way catalyst
    US4140655A|1979-02-20|Oxidation reduction catalyst for the treatment of combustion gases and method for making the catalyst
    US4552733A|1985-11-12|Polyfunctional catalysts and method of use
    JP5583967B2|2014-09-03|Exhaust gas purification catalyst, exhaust gas purification apparatus and exhaust gas purification method using the same
    JP3827838B2|2006-09-27|Exhaust gas purification catalyst
    US4061713A|1977-12-06|Purification of exhaust gases
    KR960011048B1|1996-08-16|Thermally stabilized catalysts containing alumina
    GB1563647A|1980-03-26|Oxidation-reduction catalysts
    同族专利:
    公开号 | 公开日
    JPS55157327A|1980-12-08|
    DE2907106C2|1985-12-19|
    SE445302B|1986-06-16|
    ES487743A1|1980-06-16|
    CA1125265A|1982-06-08|
    JPS5945416B2|1984-11-06|
    FR2449475B1|1986-05-16|
    US4294726A|1981-10-13|
    GB2048101A|1980-12-10|
    IT8067131D0|1980-01-30|
    DE2907106A1|1980-09-04|
    GB2048101B|1983-04-20|
    BR8001015A|1980-10-29|
    FR2449475A1|1980-09-19|
    SE8001370L|1980-10-06|
    IT1133053B|1986-07-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2306395C3|1973-02-09|1978-08-10|Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt|Supported catalyst|
    US4006103A|1973-02-27|1977-02-01|Standard Oil Company |Catalyst for treating exhaust gas from internal combustion engine|
    DE2416753C3|1974-04-05|1980-02-14|Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt|Support catalyst for exhaust gas purification, process for its manufacture and use|
    JPS6046247B2|1977-02-15|1985-10-15|Toyota Motor Co Ltd|
    US4171288A|1977-09-23|1979-10-16|Engelhard Minerals & Chemicals Corporation|Catalyst compositions and the method of manufacturing them|
    GB2027358B|1978-07-12|1983-04-27|Nippon Catalytic Chem Ind|Exhaust gas purification catalysts|
    FR2747373B1|1996-04-16|1998-06-05|Oreal|DISTRIBUTOR FOR A NON-COMPACT CONSISTENCY PRODUCT|FR2495957B1|1980-12-17|1986-09-12|Pro Catalyse|IMPROVED CATALYST AND METHOD FOR THE TREATMENT OF EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES|
    AU7959082A|1981-01-20|1982-07-29|Johnson Matthey Public Ltd. Co.|Three-way catalysts for exhaust gas|
    FR2501065B1|1981-03-09|1986-02-07|Pro Catalyse|IMPROVED CATALYST AND METHOD FOR THE TREATMENT OF EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES|
    JPS6140461B2|1981-11-11|1986-09-09|Nippon Shokubai Kagaku Kogyo Kk|
    JPS59199042A|1983-04-28|1984-11-12|Nissan Motor Co Ltd|Catalyst for reforming methanol|
    CA1213874A|1983-05-12|1986-11-12|Tomohisa Ohata|Process for producing honeycomb catalyst for exhaustgas conversion|
    JPH0215253B2|1983-11-21|1990-04-11|Nissan Motor|
    FR2556236B1|1983-12-09|1988-04-01|Pro Catalyse|METHOD FOR MANUFACTURING A CATALYST FOR THE TREATMENT OF EXHAUST GASES|
    FR2568143B1|1984-07-30|1986-12-05|Prod Catalyse Ste Fse|CATALYST AND METHOD FOR THE TREATMENT OF EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES|
    US4585752A|1984-08-15|1986-04-29|W. R. Grace & Co.|Catalyst composition for ultra high temperature operation|
    JPS6181507U|1984-11-01|1986-05-30|
    DE3539127C1|1985-11-05|1987-01-02|Hoechst Ag|Process for the production of a carrier catalyst|
    FR2595265B1|1986-03-07|1992-10-09|Pro Catalyse|CATALYST AND METHOD FOR THE TREATMENT OF EXHAUST GASES FROM INTERNAL COMBUSTION ENGINES|
    US4727052A|1986-06-27|1988-02-23|Engelhard Corporation|Catalyst compositions and methods of making the same|
    US4904633A|1986-12-18|1990-02-27|Nippon Shokubai Kagaku Kogyo Co., Ltd.|Catalyst for purifying exhaust gas and method for production thereof|
    DE3809226C2|1987-03-20|1994-10-27|Toshiba Kawasaki Kk|High temperature combustion catalyst and process for its manufacture|
    US4780447A|1987-07-10|1988-10-25|W. R. Grace & Co.-Conn.|Catalysts for controlling auto exhaust emissions including hydrocarbon, carbon monoxide, nitrogen oxides and hydrogen sulfide and method of making the catalysts|
    JP2537239B2|1987-08-28|1996-09-25|エヌ・イーケムキヤツト株式会社|Exhaust gas purification catalyst for internal combustion engine excellent in heat resistance and method for producing the same|
    US4895824A|1987-09-08|1990-01-23|W. R. Grace & Co.-Conn.|Add-on hydrogen sulfide trap|
    US4906443A|1987-10-26|1990-03-06|Ford Motor Company|Construction, method of making and method of using alumina-supported, precious metal oxidation catalysts|
    US4782038C1|1987-10-26|2001-04-17|Ford Motor Co|Platinum group alumina-supported metal oxidation catalysts and method of making same|
    ES2042687T3|1987-10-30|1993-12-16|Degussa|TRIVALENT PLATINUM-FREE CATALYST.|
    ES2033398T3|1987-10-30|1993-03-16|Degussa Aktiengesellschaft|TRIVALENT RHODIUM-FREE CATALYST.|
    DE3803122C1|1988-02-03|1989-07-13|Degussa Ag, 6000 Frankfurt, De|
    US5202300A|1988-02-18|1993-04-13|Engelhard Corporation|Catalyst for purification of exhaust gas|
    JPH0543415B2|1988-02-18|1993-07-01|N E Chemcat Corp|
    JPH0653229B2|1988-03-24|1994-07-20|トヨタ自動車株式会社|Exhaust gas purification catalyst|
    US4921830A|1988-04-13|1990-05-01|Phillips Petroleum Company|Catalyst for the oxidation of carbon monoxide|
    DE3830319C1|1988-09-07|1989-07-20|Degussa Ag, 6000 Frankfurt, De|
    DE3830318C2|1988-09-07|1990-08-30|Degussa Ag, 6000 Frankfurt, De|
    US4923842A|1988-10-11|1990-05-08|Allied-Signal Inc.|Lanthanum containing catalyst for treating automotive exhaust|
    US4977129A|1989-03-13|1990-12-11|W. R Grace & Co.-Conn.|Auto exhaust catalyst composition having low H2 S emissions and method of making the catalyst|
    US4956330A|1989-06-19|1990-09-11|Phillips Petroleum Company|Catalyst composition for the oxidation of carbon monoxide|
    US5137703A|1989-06-26|1992-08-11|Trustees Of Boston University|Thermal catalytic methods for converting oxides of nitrogen into environmentally compatible products|
    DE3929297C2|1989-07-28|1996-03-14|Degussa|Catalyst for the purification of exhaust gases from superstoichiometrically operated internal combustion engines and gas turbines|
    US5041407A|1989-12-14|1991-08-20|Allied-Signal Inc.|High-temperature three-way catalyst for treating automotive exhaust gases|
    DE4003939C2|1990-02-09|1992-03-19|Degussa Ag, 6000 Frankfurt, De|
    US5254519A|1990-02-22|1993-10-19|Engelhard Corporation|Catalyst composition containing platinum and rhodium components|
    WO1992005861A1|1990-09-27|1992-04-16|Engelhard Corporation|Catalyst composition containing base metal oxide-promoted rhodium|
    US5212142A|1991-11-04|1993-05-18|Engelhard Corporation|High performance thermally stable catalyst|
    JP3145175B2|1992-03-31|2001-03-12|三井金属鉱業株式会社|Exhaust gas purification catalyst and method for producing the same|
    DE69427602T2|1993-01-11|2001-11-22|Toyota Chuo Kenkyusho Aichi Kk|Exhaust gas purification process|
    JP3786954B2|1993-06-25|2006-06-21|エンゲルハード・コーポレーシヨン|Layered catalyst composite|
    JP3291086B2|1993-09-24|2002-06-10|トヨタ自動車株式会社|Exhaust gas purification catalyst and exhaust gas purification method|
    JP3409894B2|1993-11-17|2003-05-26|トヨタ自動車株式会社|Exhaust gas purification catalyst and exhaust gas purification method|
    FR2720296B1|1994-05-27|1996-07-12|Rhone Poulenc Chimie|Compounds based on alumina, cerium oxide and zirconium oxide with high reducibility, process for their preparation and their use in the preparation of catalysts.|
    FR2729309B1|1995-01-13|1997-04-18|Rhone Poulenc Chimie|CATALYTIC COMPOSITION BASED ON CERIUM OXIDE AND MANGANESE, IRON OR PRASEODYM OXIDE, METHOD FOR PREPARING SAME AND USE IN AUTOMOTIVE POST-COMBUSTION CATALYSIS|
    AU695953B2|1995-02-02|1998-08-27|University Court Of The University Of Dundee, The|Catalyst|
    FR2730175B1|1995-02-03|1997-04-04|Inst Francais Du Petrole|CATALYSTS FOR REDUCING NITROGEN OXIDES TO MOLECULAR NITROGEN IN A SURSTOECHIOMETRIC MEDIUM OF OXIDIZING COMPOUNDS, METHOD OF PREPARATION AND USES|
    US20040086441A1|1995-12-06|2004-05-06|Masao Hori|Process for purifying exhaust gas from gasoline engines|
    FR2742680B1|1995-12-22|1998-01-16|Inst Francais Du Petrole|COMBUSTION CATALYST AND COMBUSTION METHOD USING SUCH A CATALYST|
    US5795456A|1996-02-13|1998-08-18|Engelhard Corporation|Multi-layer non-identical catalyst on metal substrate by electrophoretic deposition|
    AU1578897A|1996-02-13|1997-09-02|Engelhard Corporation|Catalyst on metal substrate by simultaneous electrophoretic deposition of catalyst and catalyst adhesion material|
    US6087298A|1996-05-14|2000-07-11|Engelhard Corporation|Exhaust gas treatment system|
    US5948723A|1996-09-04|1999-09-07|Engelhard Corporation|Layered catalyst composite|
    US5948377A|1996-09-04|1999-09-07|Engelhard Corporation|Catalyst composition|
    US5981427A|1996-09-04|1999-11-09|Engelhard Corporation|Catalyst composition|
    JP3956437B2|1996-09-26|2007-08-08|マツダ株式会社|Exhaust gas purification catalyst|
    US6248688B1|1996-09-27|2001-06-19|Engelhard Corporation|Catalyst composition containing oxygen storage components|
    US5898014A|1996-09-27|1999-04-27|Engelhard Corporation|Catalyst composition containing oxygen storage components|
    US5985220A|1996-10-02|1999-11-16|Engelhard Corporation|Metal foil having reduced permanent thermal expansion for use in a catalyst assembly, and a method of making the same|
    US6921738B2|1996-12-06|2005-07-26|Engelhard Corporation|Catalytic metal plate|
    TW442324B|1996-12-06|2001-06-23|Engelhard Corp|Catalytic metal plate|
    US6180075B1|1997-04-09|2001-01-30|Degussa-H{umlaut over }ls Aktiengesellschaft|Exhaust gas catalyst|
    AU1930299A|1997-12-24|1999-07-19|Engelhard Corporation|Catalytic converter system for internal combustion engine powere d vehicles|
    GB9800325D0|1998-01-09|1998-03-04|Johnson Matthey Plc|Improvements in catalytic materials|
    GB9806199D0|1998-03-24|1998-05-20|Johnson Matthey Plc|Catalytic generation of hydrogen|
    US6110862A|1998-05-07|2000-08-29|Engelhard Corporation|Catalytic material having improved conversion performance|
    DE19908394A1|1999-02-26|2000-08-31|Degussa|Catalyst material and process for its manufacture|
    EP1040870A3|1999-03-29|2002-02-06|Kabushiki Kaisha Toyota Chuo Kenkyusho|Noble metal based catalyst functioning at ordinary temperature and method for destroying noxious gaseous compounds using the same|
    US6569392B1|2000-02-02|2003-05-27|Ford Global Technologies Llc|Three-way rare earth oxide catalyst|
    EP1172139B1|2000-07-14|2006-10-11|Kabushiki Kaisha Toyota Chuo Kenkyusho|Catalyst for purifying exhaust gas|
    US7166268B2|2000-11-08|2007-01-23|Idemitsu Kosan Co., Ltd.|Catalyst for hydrocarbon reforming and method of reforming hydrocarbon with the same|
    GB0028240D0|2000-11-20|2001-01-03|Johnson Matthey Plc|Three-way catalyst composition|
    US20030175192A1|2001-01-26|2003-09-18|Engelhard Corporation|SOx trap for enhancing NOx trap performance and methods of making and using the same|
    US20050164879A1|2004-01-28|2005-07-28|Engelhard Corporation|Layered SOx tolerant NOx trap catalysts and methods of making and using the same|
    US7390768B2|2002-01-22|2008-06-24|The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration|Stabilized tin-oxide-based oxidation/reduction catalysts|
    DE10209529A1|2002-03-04|2003-09-25|Hte Ag The High Throughput Exp|Catalysts rich in rhodium and doped with rare earth oxides|
    AU2003243575A1|2002-06-20|2004-01-06|The Regents Of The University Of California|Supported metal catalyst with improved thermal stability|
    CN1674985A|2002-07-09|2005-09-28|大发工业株式会社|Catalyst for clarifying exhaust gas|
    JP4311918B2|2002-07-09|2009-08-12|ダイハツ工業株式会社|Method for producing perovskite complex oxide|
    US7090826B2|2002-12-23|2006-08-15|The Boc Group, Inc.|Monolith based catalytic partial oxidation process for syngas production|
    US20040180782A1|2003-03-10|2004-09-16|Cataler Corporation|Exhaust-gas purifying catalyst|
    US7316806B2|2003-10-29|2008-01-08|Nippon Shokubai Co., Ltd.|Modifying catalyst for partial oxidation and method for modification|
    WO2005058495A1|2003-12-18|2005-06-30|Chiyoda Corporation|Catalyst for manufacturing synthesis gas and method of manufacturing synthesis gas using the same|
    DE102004005997A1|2004-02-06|2005-09-01|Hte Ag The High Throughput Experimentation Company|Iron oxide stabilized noble metal catalyst for the removal of pollutants from exhaust gases from lean-burn engines|
    US20050282698A1|2004-06-22|2005-12-22|Southward Barry W|Particulate filter device and exhaust treatment system, and methods of regenerating the same|
    US7481983B2|2004-08-23|2009-01-27|Basf Catalysts Llc|Zone coated catalyst to simultaneously reduce NOx and unreacted ammonia|
    EP1737075B1|2005-06-23|2017-03-08|Feinmetall GmbH|Contacting device|
    US7811536B2|2005-07-21|2010-10-12|University Of Delaware|Nitrogen oxides storage catalysts containing cobalt|
    US20070098611A1|2005-10-31|2007-05-03|Yang Xiaolin D|Stabilized flash calcined gibbsite as a catalyst support|
    US7506504B2|2005-12-21|2009-03-24|Basf Catalysts Llc|DOC and particulate control system for diesel engines|
    CN108671908A|2011-06-21|2018-10-19|优美科股份公司及两合公司|Method for the deposited metal in support oxide|
    US10159962B2|2012-01-18|2018-12-25|Intramicron, Inc.|Catalysts for oxidative sulfur removal and methods of making and using thereof|
    EP2810053A1|2012-02-01|2014-12-10|Intramicron, Inc.|Direct in situ monitoring of adsorbent and catalyst beds|
    AR109482A1|2016-10-03|2018-12-12|Petroleo Brasileiro Sa Petrobras|PREPARATION PROCESS OF AN IRON-CHROME CATALYST PROMOTED WITH PLATINUM, AND, IRON-CHROME COMPOSITE CATALYST PROMOTED BY PLATINUM|
    CN109745997A|2019-01-25|2019-05-14|中国建筑材料科学研究总院有限公司|The preparation method of spherical cryogenic denitrating catalyst, the spherical cryogenic denitrating catalyst by this method preparation and its application|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2907106A|DE2907106C2|1979-02-23|1979-02-23|Catalytic converter and its use for cleaning exhaust gases from internal combustion engines|
    [返回顶部]