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    Process using catalysts for selective catalytic reduction denox technology
    3.
    发明授权
    Process using catalysts for selective catalytic reduction denox technology 失效
    使用催化剂进行选择性催化还原技术的工艺

    公开(公告)号：US4975256A

    公开(公告)日：1990-12-04

    申请号：US417141

    申请日：1989-10-04

    申请人： Louis Hegedus ,  Jean W. Beeckman ,  Wie-Hin Pan ,  Jeffrey P. Solar

    发明人： Louis Hegedus ,  Jean W. Beeckman ,  Wie-Hin Pan ,  Jeffrey P. Solar

    IPC分类号： B01D53/86 ,  B01J21/06 ,  B01J35/10

    CPC分类号： B01J21/063 ,  B01D53/8628 ,  B01J21/06 ,  B01J35/002 ,  B01J35/10 ,  B01J35/1019

    摘要： Catalysts for the selective catalytic reduction of NOx by ammonia are made from porous formed supports having a certain fraction of the pores with pore diameters larger than 600 Angstrom units. Thus macropores can be introduced in a formed TiO.sub.2 support by adding burnout materials or some inorganic oxide prior to forming the titania into the formed support. Alternatively, titania is precipitated onto a porous inorganic oxide such as SiO.sub.2, Al.sub.2 O.sub.3, ZrO.sub.2, AlPO.sub.4, Fe.sub.2 O.sub.3 and B.sub.2 O.sub.3 to form the support. Then conventional DeNOx catalytic metals are added. The support can be made by first impregnating the inorganic oxide particles with titania via a soluble precursor, forming titania and then shaping the coated particles into the desired shape such as a monolith. In a second embodiment, the inorganic oxide particles are first formed into the desired shape and then impregnated with the titania forming material. Barium sulfate can be added to the surface of the porous inorganic oxide to make an improved support.

    摘要翻译： 用于由氨选择性催化还原NOx的催化剂由具有孔径大于600埃单位的孔的一定部分的多孔成形载体制成。 因此，在将二氧化钛形成到形成的载体之前，可以通过添加烧制材料或一些无机氧化物将大孔引入形成的TiO 2载体中。 或者，二氧化钛沉淀到诸如SiO 2，Al 2 O 3，ZrO 2，AlPO 4，Fe 2 O 3和B 2 O 3的多孔无机氧化物上以形成载体。 然后加入常规的DeNOx催化金属。 可以通过首先通过可溶性前体用二氧化钛浸渍无机氧化物颗粒，形成二氧化钛，然后将涂覆的颗粒成形为期望的形状如整料来制备载体。 在第二实施方案中，首先将无机氧化物颗粒形成为所需形状，然后用二氧化钛形成材料浸渍。 可以将硫酸钡加入到多孔无机氧化物的表面以形成改进的载体。

    Enhanced crystal acidity exchange method
    6.
    发明授权
    Enhanced crystal acidity exchange method 失效
    增强晶体酸度交换方法

    公开(公告)号：US07553790B2

    公开(公告)日：2009-06-30

    申请号：US11258440

    申请日：2005-10-25

    申请人： Jean W. Beeckman ,  Glenn R. Sweeten ,  Daria N. Lissy ,  David L. Stern ,  Stephen J. McCarthy ,  Dominick N. Mazzone ,  Christine N. Elia

    发明人： Jean W. Beeckman ,  Glenn R. Sweeten ,  Daria N. Lissy ,  David L. Stern ,  Stephen J. McCarthy ,  Dominick N. Mazzone ,  Christine N. Elia

    IPC分类号： B01J29/06

    CPC分类号： B01J29/40 ,  B01J2229/42

    摘要： The present invention describes a method to increase the activity of a catalyst by first performing an ion exchange step with a potassium ion, followed by performing an ion-exchange step with an ammonium ion. Specifically, the present invention describes a method to increase the acidity of a zeolite by incorporating a potassium salt ion-exchange prior to an ammonium salt ion-exchange step. Even more specifically, the present invention is drawn to a method of increasing the activity of a zeolite by employing more than one potassium ion exchanges followed by at least one ammonium ion exchange. The present invention also describes a method to reduce the amount of sodium normally found in commercially produced zeolite by employing any of these methods. The present invention is also drawn to the catalysts produced by any of these methods.

    摘要翻译： 本发明描述了通过首先用钾离子进行离子交换步骤，然后用铵离子进行离子交换步骤来提高催化剂活性的方法。 具体地，本发明描述了通过在铵盐离子交换步骤之前引入钾盐离子交换来提高沸石的酸度的方法。 更具体地说，本发明涉及通过使用多于一种的钾离子交换，然后进行至少一种铵离子交换来提高沸石的活性的方法。 本发明还描述了一种通过使用任何这些方法来减少通常在商业生产的沸石中发现的钠的量的方法。 本发明还涉及通过任何这些方法制备的催化剂。