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    Process for preparing a catalyst
    13.
    发明授权
    Process for preparing a catalyst 有权
    催化剂的制备方法

    公开(公告)号：US06342465B1

    公开(公告)日：2002-01-29

    申请号：US09205280

    申请日：1998-12-04

    申请人： Harald Klein ,  Jürgen Leyrer ,  Rainer Domesle ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Harald Klein ,  Jürgen Leyrer ,  Rainer Domesle ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： B01J2342

    CPC分类号： B01J23/40 ,  B01J37/0248

    摘要： A process for preparing a catalyst which has a catalytically active coating of high surface area finely divided materials and catalytically active components on an inert carrier structure. A powder mixture of the finely divided materials used is impregnated with a solution of precursor compounds of the catalytically active components. By suitable combination of the finely divided materials and the precursor compounds and appropriate management of the impregnation process, a highly dispersed deposition and adsorption of the catalytically active components is ensured on the finely divided materials. Then ai aqueous coating dispersion is produced using the impregnated powder mixture and the carrier structure is coated therewith. The coating is then dried and calcined.

    摘要翻译： 一种在惰性载体结构上制备具有高表面积细碎材料和催化活性组分的催化活性涂层的催化剂的方法。 所使用的细碎材料的粉末混合物用催化活性组分的前体化合物的溶液浸渍。 通过精细分散的材料和前体化合物的合适组合以及浸渍过程的适当管理，在精细分散的材料上确保高度分散的催化活性组分的沉积和吸附。 然后使用浸渍的粉末混合物制备ai水性涂料分散体，并用其涂覆载体结构。 然后将涂层干燥并煅烧。

    Process for operating an exhaust gas treatment unit containing a sulfur trap and a nitrogen oxides storage catalyst
    15.
    发明授权
    Process for operating an exhaust gas treatment unit containing a sulfur trap and a nitrogen oxides storage catalyst 有权
    用于操作含有硫捕集器和氮氧化物储存催化剂的排气处理单元的方法

    公开(公告)号：US06145303A

    公开(公告)日：2000-11-14

    申请号：US276131

    申请日：1999-03-25

    申请人： Wolfgang Strehlau ,  Ulrich Gobel ,  Egbert Lox ,  Wilfried Muller ,  Rainer Domesle

    发明人： Wolfgang Strehlau ,  Ulrich Gobel ,  Egbert Lox ,  Wilfried Muller ,  Rainer Domesle

    IPC分类号： B01D53/86 ,  B01D53/94 ,  B01J21/16 ,  F01N3/08 ,  F01N3/10 ,  F01N3/20 ,  F01N3/24 ,  F01N3/28 ,  F01N9/00 ,  F01N13/02 ,  F02D41/14 ,  F01N3/00 ,  B01D47/00

    CPC分类号： B01D53/9422 ,  B01D53/949 ,  F01N13/009 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/0871 ,  B01D2255/102 ,  B01D2255/202 ,  B01D2255/204 ,  B01D2255/2061 ,  B01D2255/2063 ,  B01D2255/91 ,  F01N2340/02 ,  Y02T10/22

    摘要： A process is disclosed for operating an exhaust gas treatment unit for an internal combustion engine which is operated with lean normalized air/fuel ratios over most of the operating period. The exhaust gas treatment unit contains a nitrogen oxides storage catalyst with an activity window .DELTA.T.sub.NOX for the storage of nitrogen oxides at normalized air/fuel ratios of greater than 1 and release of the nitrogen oxides at normalized air/fuel ratios of less than or equal to 1 and a sulfur trap, located upstream of the nitrogen oxides storage catalyst, with a sulfur desorption temperature T.sub.S,DeSOx above which the sulfates stored on the sulfur trap are decomposed at normalized air/fuel ratios of less than or equal to 1. The nitrogen oxides contained in the exhaust gas are stored on the nitrogen oxides storage catalyst and the sulfur oxides are stored on the sulfur trap at normalized air/fuel ratios greater than 1 and exhaust gas temperatures T.sub.K within the activity window T.sub.NOX, wherein at the same time the exhaust gas temperature just upstream of the sulfur trap is lower than its sulfur desorption temperature T.sub.S,DeSOx. By cyclic lowering of the normalized air/fuel ratio in the exhaust gas to less than 1 the stored nitrogen oxides are released again from the storage catalyst. After each predetermined number N.sub.1 of nitrogen oxides storage cycles, sulfur is removed from the sulfur trap. This takes place by raising the exhaust gas temperature just upstream of the sulfur trap to above its sulfur desorption temperature T.sub.S,DeSOx and also lowering the normalized air/fuel ratio in the exhaust gas to less than 1.

    摘要翻译： 公开了一种用于操作用于内燃机的排气处理单元的方法，该内燃机在大部分操作周期内以精简的归一化空气/燃料比操作。 废气处理单元包含具有活性窗口DELTA TNOX的氮氧化物存储催化剂，用于在标准化的空气/燃料比大于1时储存氮氧化物，并且在标准化的空气/燃料比小于或等于 至1和位于氮氧化物储存催化剂上游的硫捕集器，具有硫解吸温度TS，DeSOx，其上储存在硫阱上的硫酸盐在标准化的空气/燃料比小于或等于1时分解。 废气中含有的氮氧化物被储存在氮氧化物储存催化剂上，硫氧化物以规定的大于1的空气/燃料比和废气温度TK存储在活性窗口TNOX内，其中同时 硫阱的上游排气温度低于其脱硫温度TS，DeSOx。 通过将排气中的归一化空气/燃料比循环降低到小于1，储存的氮氧化物再次从储存催化剂释放。 在氮氧化物存储循环的每个预定数量的N1之后，从硫阱中除去硫。 这通过将硫捕集器正好上游的废气温度提高到高于其硫解吸温度TS，DeSOx并且将排气中的归一化空气/燃料比降至小于1来进行。

    Single layer high performance catalyst
    20.
    发明授权
    Single layer high performance catalyst 有权
    单层高性能催化剂

    公开(公告)号：US06524992B2

    公开(公告)日：2003-02-25

    申请号：US09818998

    申请日：2001-03-28

    申请人： Lothar Mussmann ,  Dieter Lindner ,  Martin Votsmeier ,  Egbert Lox ,  Thomas Kreuzer

    发明人： Lothar Mussmann ,  Dieter Lindner ,  Martin Votsmeier ,  Egbert Lox ,  Thomas Kreuzer

    IPC分类号： B01J2310

    CPC分类号： B01D53/945 ,  B01J23/42 ,  B01J23/464 ,  B01J23/63 ,  B01J37/0248 ,  Y02T10/22

    摘要： A single layer high performance catalyst containing on an inert carrier body a catalytic coating comprising platinum, rhodium and various oxide materials. The catalyst contains a catalytic coating having at least one first support material selected from the group having a first active alumina, a ceria rich ceria/zirconia mixed oxide and a zirconia component, said at least one first support material being catalyzed with a first part of the total platinum amount of the catalyst, and a second support material catalyzed with the second part of the total platinum amount and with rhodium said second support material being a second active alumina.

    摘要翻译： 在惰性载体上含有铂，铑和各种氧化物材料的催化涂层的单层高性能催化剂。 该催化剂含有具有至少一种选自具有第一活性氧化铝，富铈二氧化铈/氧化锆混合氧化物和氧化锆组分的第一载体材料的催化涂层，所述至少一种第一载体材料被第一部分催化 催化剂的总铂量，以及以总铂量的第二部分催化的第二载体材料，并且所述第二载体材料为第二活性氧化铝。