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13 条记录 (耗时 0.013 秒)

    Process for preparing a catalyst for aromatic production
    2.
    发明授权
    Process for preparing a catalyst for aromatic production 有权
    制备芳香族生产催化剂的方法

    公开(公告)号：US06617275B1

    公开(公告)日：2003-09-09

    申请号：US10022107

    申请日：2001-12-13

    申请人： Sanjay B. Sharma ,  John Kulach ,  Aaron James Imrie

    发明人： Sanjay B. Sharma ,  John Kulach ,  Aaron James Imrie

    IPC分类号： B01J2906

    CPC分类号： B01J29/061 ,  B01J29/405 ,  B01J2229/20 ,  B01J2229/42

    摘要： A novel process for converting C2 to C6 aliphatic hydrocarbons to aromatics and catalyst for use in this process are disclosed. The catalyst that contains a zeolite having a silica to alumina molar ratio greater than about 20 and a pore diameter from about 5 Å to about 6 Å, an essentially non-acidic binder, and a gallium component. The binder is selected from silica, zirconia, titania, and mixtures thereof and results in a catalyst formulation having both enhanced selectivity to desired C6-C9 aromatic products and improved stability compared to prior art compositions. Preferred zeolites that can be used include those of the MFI structure type, with ZSM-5 being a specific example.

    摘要翻译： 公开了一种用于将C2转化为C6脂族烃到用于该方法中的芳族化合物和催化剂的新方法。 含有二氧化硅与氧化铝摩尔比大于约20，孔直径为约5至约6的沸石，基本上非酸性粘合剂和镓组分的沸石的催化剂。 粘合剂选自二氧化硅，氧化锆，二氧化钛及其混合物，并且导致与现有技术组合物相比，具有对期望的C 6 -C 9芳香族产物的增强的选择性和改善的稳定性的催化剂制剂。 可以使用的优选的沸石包括MFI结构类型的沸石，ZSM-5是具体实例。

    Selective xylenes isomerization and ethylbenzene conversion
    3.
    发明授权
    Selective xylenes isomerization and ethylbenzene conversion 失效
    选择性二甲苯异构化和乙苯转化

    公开(公告)号：US06355853B1

    公开(公告)日：2002-03-12

    申请号：US09511936

    申请日：2000-02-24

    申请人： Sanjay B. Sharma ,  Sergey V. Gurevich

    发明人： Sanjay B. Sharma ,  Sergey V. Gurevich

    IPC分类号： C07C527

    CPC分类号： C07C5/2724 ,  C07C2529/74 ,  C07C15/067

    摘要： This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using a catalyst comprising a zeolite, a platinum-group metal and a silica binder, resulting in a greater yield of para-xylene at favorable conditions compared to processes of the known art.

    摘要翻译： 本发明涉及使用包含沸石，铂族金属和二氧化硅粘合剂的催化剂使二甲苯和乙苯的非平衡混合物异构化的方法，在有利条件下与步骤相比，产生更高的对二甲苯收率 的已知艺术。

    Process for exhaust gas NO.sub.x, CO, and hydrocarbon removal
    4.
    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。

    Catalytic system for the reducton of nitrogen oxides
    8.
    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。