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61 条记录 (耗时 0.022 秒)

    Method for the reduction of nitrogen oxides using iron impregnated zeolites
    1.
    发明授权
    Method for the reduction of nitrogen oxides using iron impregnated zeolites 失效
    使用铁浸渍沸石还原氮氧化物的方法

    公开(公告)号：US5520895A

    公开(公告)日：1996-05-28

    申请号：US271693

    申请日：1994-07-07

    申请人： Sanjay B. Sharma ,  David S. Shihabi

    发明人： Sanjay B. Sharma ,  David S. Shihabi

    IPC分类号： B01D53/86 ,  B01D53/94 ,  B01J29/072 ,  B01J37/02 ,  C01B21/00

    CPC分类号： B01J37/0203 ,  B01D53/8621 ,  B01D53/865 ,  B01D53/9418 ,  B01J29/072 ,  B01D2251/2062 ,  B01D2255/20738 ,  B01D2255/50

    摘要： There is provided a process for the treatment of exhaust gas, which process uses a specially prepared catalyst composition, for the selective catalytic reduction of NO.sub.x contained in the exhaust gas. An embodiment of the process of this invention comprises a catalytic stage to selectively catalytically reduce NO.sub.x over a catalyst composition comprising an intermediate pore size zeolite catalyst that has been treated with a water soluble iron salt or salt precursor in a way effective to maximize iron dispersion. The intermediate pore size zeolite of this invention preferably has a silica:alumina molar ratio of between about 20 and about 1000. The catalyst of this invention typically comprises a silica, titania, or zirconia binder, preferably a binder including a high molecular weight, hydroxyl functional silicone resin. The catalyst of this invention is preferably formed, e.g., extruded, and then simultaneously calcined and hydrothermally treated.

    摘要翻译： 提供了一种处理废气的方法，该方法使用特别制备的催化剂组合物来选择性催化还原废气中所含的NOx。 本发明方法的一个实施方案包括催化阶段，以催化还原催化剂还原催化剂组合物，该催化剂组合物包含中和孔径的沸石催化剂，该催化剂已经以有效使铁分散最大化的方式用水溶性铁盐或盐前体处理。 本发明的中等孔径沸石优选具有约20至约1000的二氧化硅：氧化铝摩尔比。本发明的催化剂通常包含二氧化硅，二氧化钛或氧化锆粘合剂，优选包含高分子量羟基的粘合剂 功能硅树脂。 本发明的催化剂优选形成例如挤出，然后同时进行煅烧和水热处理。

    Catalytic system for the reducton of nitrogen oxides
    5.
    发明授权
    Catalytic system for the reducton of nitrogen oxides 失效
    用于氮氧化物还原的催化体系

    公开(公告)号：US5589147A

    公开(公告)日：1996-12-31

    申请号：US271685

    申请日：1994-07-07

    申请人： Maria D. Farnos ,  John P. McWilliams ,  Sanjay B. Sharma ,  David S. Shihabi

    发明人： Maria D. Farnos ,  John P. McWilliams ,  Sanjay B. Sharma ,  David S. Shihabi

    IPC分类号： B01D53/86 ,  B01D53/94 ,  B01J29/072 ,  B01J37/02 ,  C01B21/00

    CPC分类号： B01J37/0203 ,  B01D53/8621 ,  B01D53/865 ,  B01D53/9418 ,  B01J29/072 ,  B01D2251/2062 ,  B01D2255/20738 ,  B01D2255/504

    摘要： There is presented a process for the treatment of exhaust gas, which process uses a specially prepared catalyst composition, for the selective catalytic reduction of NO.sub.x contained in the exhaust gas. An embodiment of the process of this invention comprises a catalytic stage to selectively catalytically reduce NO.sub.x over a catalyst composition comprising a molecular sieve that has been treated with a metal in a way effective to maximize metal dispersion. The catalyst of this invention typically comprises a silica, titania, or zirconia binder, e.g. a binder including a high molecular weight, hydroxyl functional silicone resin. The catalyst of this invention may be formed into a desired shape, e.g., by extrusion, and finished in a humidified atmosphere after forming.

    摘要翻译： 提出了一种处理废气的方法，该方法使用特别制备的催化剂组合物来选择性催化还原废气中所含的NOx。 本发明方法的一个实施方案包括催化阶段，以选择性地催化还原NOx，所述催化剂组合物包含用有效使金属分散最大化的金属处理的分子筛。 本发明的催化剂通常包括二氧化硅，二氧化钛或氧化锆粘合剂，例如， 包含高分子量羟基官能的有机硅树脂的粘合剂。 本发明的催化剂可以例如通过挤出形成所需的形状，并在成型后的加湿气氛中成型。

    Process for exhaust gas NO.sub.x, CO, and hydrocarbon removal
    6.
    发明授权
    Process for exhaust gas NO.sub.x, CO, and hydrocarbon removal 失效
    废气NOx，CO和烃的去除方法

    公开(公告)号：US5676912A

    公开(公告)日：1997-10-14

    申请号：US391859

    申请日：1995-02-22

    申请人： Sanjay B. Sharma ,  David S. Shihabi

    发明人： Sanjay B. Sharma ,  David S. Shihabi

    IPC分类号： B01D53/94 ,  B01D53/92 ,  B01D53/56 ,  B01D53/62 ,  B01D53/72

    CPC分类号： B01D53/945 ,  Y02T10/22

    摘要： There is provided a multizone catalytic process for the treatment of exhaust gas comprising nitrogen oxides, hydrocarbons, and carbon monoxide. In the multizone catalytic process, the exhaust gas is directed through a first zone, a second zone, and a third zone. The first zone comprises a catalyst that is effective for the three-way conversion of nitrogen oxides, hydrocarbons, and carbon monoxide. The second zone comprises materials effective to sorb hydrocarbons, e.g., zeolites ZSM-5 and Beta, particularly iron modified zeolites ZSM-5 and Beta. The second zone is effective for the adsorption of hydrocarbons from the exhaust gas during the cold-start period of operation of an internal combustion engine. The third zone comprises a catalyst that is effective for the oxidation of hydrocarbons and carbon monoxide.

    摘要翻译： 提供了一种用于处理包含氮氧化物，碳氢化合物和一氧化碳的废气的多区域催化方法。 在多区域催化过程中，废气被引导通过第一区域，第二区域和第三区域。 第一区域包含对氮氧化物，碳氢化合物和一氧化碳三元转化有效的催化剂。 第二区域包括有效吸附烃的材料，例如沸石ZSM-5和β，特别是铁改性沸石ZSM-5和β。 第二区域对于在内燃机的冷启动期间从排气中吸附碳氢化合物是有效的。 第三区域包含对烃和一氧化碳的氧化有效的催化剂。

    FCC regenerator in partial CO burn with downstream air addition
    8.
    发明授权
    FCC regenerator in partial CO burn with downstream air addition 失效
    FCC再生器部分CO燃烧与下游空气添加

    公开(公告)号：US5830346A

    公开(公告)日：1998-11-03

    申请号：US521177

    申请日：1995-08-30

    申请人： Mohsen N. Harandi ,  Paul H. Schipper ,  David S. Shihabi ,  Scott A. Stevenson

    发明人： Mohsen N. Harandi ,  Paul H. Schipper ,  David S. Shihabi ,  Scott A. Stevenson

    IPC分类号： B01D53/86 ,  C10G11/18 ,  C10G11/00 ,  B01J21/20 ,  C01B21/02

    CPC分类号： C10G11/182 ,  B01D53/8625

    摘要： Oxides of nitrogen (NO.sub.x) emissions from an FCC regenerator are reduced by operating the regenerator in partial CO burn mode to produce flue gas with more CO than O.sub.2 and with NO.sub.x precursors. This flue gas is then enriched with controlled amounts of oxygen and charged over catalyst, preferably Group VIII noble metal on a support, to convert most NO.sub.x precursors to nitrogen. Flue gas may then be charged to a CO boiler. Eliminating more than 90% of NO.sub.x emissions is possible by operating the FCC regenerator in partial CO burn mode, then adding air and catalytically converting NO.sub.x precursors at substoichiometric conditions. Conversion of NO.sub.x, if formed in the regenerator, may be achieved as well.

    摘要翻译： 通过在部分CO燃烧模式下操作再生器来减少来自FCC再生器的氮（NOx）排放的氧化物，以产生具有比O 2和NO x前体更多的CO的烟道气。 然后，该烟道气用受控量的氧气富集，并通过催化剂，优选载体上的VIII族贵金属加入，以将大部分NOx前体转化为氮气。 然后将烟道气充入CO锅炉。 通过在部分CO燃烧模式下操作FCC再生器，然后在亚化学计量条件下添加空气和催化转化NOx前体，可以消除超过90％的NOx排放。 也可以在再生器中形成NOx的转化。

    Denitrification of flue gas from catalytic cracking
    9.
    发明授权
    Denitrification of flue gas from catalytic cracking 失效
    烟气从催化裂化中脱氮

    公开(公告)号：US5173278A

    公开(公告)日：1992-12-22

    申请号：US669821

    申请日：1991-03-15

    申请人： David O. Marler ,  Ajit V. Sapre ,  David S. Shihabi ,  Richard F. Socha ,  Scott A. Stevenson

    发明人： David O. Marler ,  Ajit V. Sapre ,  David S. Shihabi ,  Richard F. Socha ,  Scott A. Stevenson

    IPC分类号： B01D53/86 ,  C10G11/18

    CPC分类号： B01D53/8625 ,  B01D53/8621 ,  C10G11/182 ,  B01D2257/408 ,  Y02P30/446

    摘要： A flue gas that contains small amounts of both HCN and NO.sub.x, produced, for example, by catalyst regeneration in the fluid catalytic cracking of a petroleum gas oil, is readily denitrified by the catalyzed reaction that proceeds approximately according to:HCN+NO.fwdarw.N.sub.2 (gas)+CO+CO.sub.2 +H.sub.2 OIf the molar ratio of HCN to NO in the flue gas is about 1.0, e.g. in the range of about 0.8 to 1.2, effective denitrification is achieved without first changing the composition of the flue gas by contacting it with catalyst under conversion conditions including elevated temperature. If the molar ratio of HCN to NO exceeds 1.2, the ratio may be adjusted to about 1.0 to 1.1 by thermal or catalytic oxidation in the presence of oxygen gas, followed by catalytic denitrification. If the molar ratio is less than about 0.8, the effective molar ratio is adjusted to about 1.0 to 1.1 by adding NH.sub.3 gas, followed by denitirification. In all three instances an excessive content of carbon monoxide in the flue gas may be corrected by passing the denitrified flue gas to a CO-boiler.Catalysts for the denitrification reaction are described and exemplified by crystalline zeolites of the ZSM-5 type, and by vanadium oxide supported on titania.

    摘要翻译： 含有少量HCN和NOx的烟道气，例如通过在石油瓦斯油的流化催化裂化中的催化剂再生产生的烟气，可以通过大致按以下方式进行的催化反应脱氮：HCN + NO-> N2（气体）+ CO + CO2 + H2O如果烟气中HCN与NO的摩尔比为约1.0， 在约0.8至1.2的范围内，无需首先在包括升高的温度的转化条件下将催化剂与催化剂接触，而不改变烟道气的组成，实现有效的脱氮。 如果HCN与NO的摩尔比超过1.2，则在氧气存在下通过热或催化氧化将该比例调节至约1.0至1.1，然后进行催化反硝化。 如果摩尔比小于约0.8，则通过加入NH 3气体将有效摩尔比调节至约1.0-1.1，然后进行脱硝。 在所有三种情况下，可以通过将反硝化烟道气通过CO锅炉来校正烟道气中过量的一氧化碳。 用于脱氮反应的催化剂通过ZSM-5型的结晶沸石和负载在二氧化钛上的氧化钒来描述和例示。

    Modified crystalline aluminosilicate zeolite catalyst and its use in the production of lubes of high viscosity index
    10.
    发明授权
    Modified crystalline aluminosilicate zeolite catalyst and its use in the production of lubes of high viscosity index 失效
    改性结晶硅铝酸盐沸石催化剂及其在生产高黏度指数的润滑剂中的应用

    公开(公告)号：US5043307A

    公开(公告)日：1991-08-27

    申请号：US402716

    申请日：1989-09-05

    申请人： Emmerson Bowes ,  Clarence D. Chang ,  Scott Han ,  David S. Shihabi

    发明人： Emmerson Bowes ,  Clarence D. Chang ,  Scott Han ,  David S. Shihabi

    IPC分类号： C10G50/02

    CPC分类号： C10G50/02

    摘要： The present invention provides a process for modifying a crystalline aluminosilicate zeolite having a Constraint Index of from about to about 12 which comprises:a) steaming the as synthesized crystalline aluminosilicate zeolite containing organic template material to decompose at least a portion of said template material and to extract zeolitic aluminum; and,b) contacting the zeolite resulting from step (a) in the ammonium, alkali metal or hydrogen form with a dealuminizing agent which forms a water-soluble complex with aluminum to remove a further quantity of zeolitic aluminum therefrom.

    摘要翻译： 本发明提供了一种修饰约约至约12约束指数的结晶硅铝酸盐沸石的方法，该方法包括：a）蒸煮含有有机模板材料的合成的结晶硅铝酸盐沸石以分解所述模板材料的至少一部分，以及 提取沸石铝; 和b）将由步骤（a）得到的沸石以铵，碱金属或氢的形式与脱铝剂接触，脱铝剂与铝形成水溶性络合物以从其中除去另外量的沸石铝。