公开(公告)号：US20010036432A1

公开(公告)日：2001-11-01

申请号：US09848984

申请日：2001-05-04

Applicant: ENGELHARD CORPORATION

Inventor： Zhicheng Hu ,  Ronald M. Heck ,  Harold N. Rabinowitz

IPC: B01D053/92 ,  B01J023/44 ,  B01J023/10

CPC classification number: B01D53/945 ,  B01D2255/908 ,  B01J23/58 ,  F01N3/0864 ,  F01N3/2828 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/0097 ,  F01N2370/00 ,  F02B1/04 ,  Y02T10/22

Abstract: A stable, close-coupled catalyst, an article comprising the close-coupled catalyst and a related method of operation. The close-coupled catalyst comprises a catalyst support and a palladium catalytic component. Preferably and optionally, there are stabilizers including alkaline metal oxide, and rare earth metal components selected from the neodymium and lanthanum components. The close-coupled catalyst composition includes substantially no additional oxygen storage component such as praseodymium or cerium compounds. There is preferably a catalyst such as a three-way catalyst downstream of the close-coupled catalyst. The downstream catalyst preferably includes an oxygen storage component such as cerium oxide or praseodymium oxide.

Abstract translation: 稳定的紧密耦合的催化剂，包含紧密耦合催化剂的物品和相关的操作方法。 紧密耦合的催化剂包括催化剂载体和钯催化组分。 优选和任选地，存在稳定剂，包括碱金属氧化物和选自钕和镧组分的稀土金属组分。 紧密耦合的催化剂组合物基本上不含另外的储氧组分如镨或铈化合物。 优选催化剂，例如紧密耦合的催化剂下游的三元催化剂。 下游催化剂​​优选包括氧存储组分如氧化铈或氧化镨。

公开(公告)号：US20040001782A1

公开(公告)日：2004-01-01

申请号：US10366096

申请日：2003-02-13

Applicant: ENGELHARD CORPORATION

Inventor： Sanath V. Kumar ,  Harold N. Rabinowitz

IPC: B01D053/34

CPC classification number: F01N3/0842 ,  B01D53/945 ,  B01J23/44 ,  B01J35/04 ,  F01N3/0814 ,  F01N3/28 ,  F01N13/0097 ,  F01N2570/16

Abstract: Provided are coated, multi-zoned catalyst substrates that trap and combust hydrocarbon and nitrogen oxides pollutants in a single monolith substrate. In some embodiments, the multi-zoned catalysts contain both radial and axial zones. The zones can be formed by deposition of segregated coating compositions (or washcoats) containing platinum group metals and pollutant adsorbent materials to form layers along the length and radius of the honeycomb substrate. The invention also relates to exhaust gas treating systems that incorporate the multi-zoned catalysts.

Abstract translation: 提供了在单个整体衬底中捕获和燃烧烃和氮氧化物污染物的涂覆的多区域催化剂衬底。 在一些实施方案中，多区域催化剂包含径向和轴向区域。 这些区域可以通过沉积包含铂族金属和污染物吸附剂材料的分离的涂料组合物（或洗面漆）形成，以沿蜂窝基材的长度和半径形成层。 本发明还涉及掺入多区域催化剂的废气处理系统。

公开(公告)号：US20040001781A1

公开(公告)日：2004-01-01

申请号：US10183863

申请日：2002-06-27

Applicant: ENGELHARD CORPORATION

Inventor： Sanath V. Kumar ,  Harold N. Rabinowitz ,  John J. Steger

IPC: B01D053/34

CPC classification number: F01N3/0842 ,  B01D53/945 ,  B01J23/44 ,  B01J35/04 ,  F01N3/0814 ,  F01N3/28 ,  F01N13/0097 ,  F01N2570/16 ,  Y02T10/22

Abstract: Provided is an exhaust article (catalyst) coated on a single substrate, such as a monolithic honeycomb having a plurality of channels along the axial length of the catalyst. Different washcoat compositions are deposited along the length the channel walls of the substrate beginning from either the inlet or outlet axial end of the substrate to form inlet and outlet catalyst layers, respectively. In the coating process, the channel walls are coated with catalyst washcoat compositions to lengths that are less than the substrates' axial length. The architecture of the resulting catalyst layers defines a plurality of zones along the length of the substrate. The properties of each zone of the catalyst can be optimized to address specific catalyst functions by manipulation of both the coating lengths and the catalyst washcoat compositions.

Abstract translation: 提供了涂覆在单个基板上的排气制品（催化剂），例如沿着催化剂的轴向长度具有多个通道的整体式蜂窝体。 不同的修补基面涂层组合物沿着衬底的通道壁的长度沉积，从衬底的入口或出口轴向端开始分别形成入口和出口催化剂层。 在涂覆过程中，通道壁涂覆有催化剂修补基面涂层组合物，其长度小于基材的轴向长度。 所得到的催化剂层的结构限定了沿衬底长度的多个区域。 催化剂的每个区域的性质可以通过操纵涂层长度和催化剂修补基面涂料组合物来优化以满足具体的催化剂功能。

公开(公告)号：US20030158037A1

公开(公告)日：2003-08-21

申请号：US10079450

申请日：2002-02-20

Applicant: ENGELHARD CORPORATION

Inventor： John S. Foong ,  Harold N. Rabinowitz

IPC: B01J023/58 ,  B01J023/02 ,  B01J023/06

CPC classification number: B01D53/945 ,  B01J23/58 ,  B01J23/63 ,  B01J37/0244 ,  B01J37/0248 ,  F01N3/2803 ,  Y02T10/22

Abstract: Hydrogen sulfide formation is suppressed by a three-way conversion catalyst having an underlayer and a topcoat overlying the under layer. The under layer is prepared by dispersing a Group IIa metal oxide such as an oxide of magnesium, calcium, barium or strontium on a carrier such as a refractory metal oxide monolith. A topcoat overlying the undercoat is comprised of a three-way conversion catalyst material such as a platinum-group metal catalytic component, e.g., platinum, palladium, rhodium or mixtures thereof.

Abstract translation: 通过具有覆盖在下层上的底层和顶涂层的三元转化催化剂抑制硫化氢形成。 通过将诸如镁，钙，钡或锶的氧化物的IIa族金属氧化物分散在诸如难熔金属氧化物整料的载体上来制备底层。 覆盖底涂层的面漆由三元转化催化剂材料如铂族金属催化组分如铂，钯，铑或其混合物组成。

公开(公告)号：US20030100447A1

公开(公告)日：2003-05-29

申请号：US10003663

申请日：2001-10-26

Applicant: ENGELHARD CORPORATION

Inventor： Michel Deeba ,  John J. Steger ,  Harold N. Rabinowitz ,  John S. Foong

IPC: B01D053/94 ,  B01J023/40

CPC classification number: B01D53/945 ,  B01D53/865 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/902 ,  B01D2255/9025 ,  B01D2255/908 ,  B01D2255/9207 ,  B01J23/63 ,  B01J37/0244 ,  Y02T10/22

Abstract: The present invention relates to a layered catalyst composite of the type generally referred to as a three-way conversion catalyst having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides. The structure of the layered catalyst composite of the present invention is designed wherein there are three layers in conjunction with a carrier: a first layer deposited on the carrier and comprising a high surface area refractory metal oxide; a second layer deposited on the first layer and comprising palladium and/or platinum deposited on a high surface area refractory metal oxide, and having substantially no oxygen storage components; and a third layer deposited on the second layer and comprising platinum and/or rhodium as well as an oxygen storage component, deposited on a high surface area refractory metal oxide.

Abstract translation: 本发明涉及一种具有同时催化烃和一氧化碳的氧化和还原氮氧化物的能力的通常称为三元转化催化剂的层状催化剂复合物。 设计本发明的层状催化剂复合材料的结构，其中有三层结合载体：沉积在载体上并包含高表面积难熔金属氧化物的第一层; 沉积在第一层上并包含沉积在高表面积难熔金属氧化物上的钯和/或铂，并且基本上没有储氧组分的第二层; 以及沉积在第二层上并且包含铂和/或铑以及沉积在高表面积难熔金属氧化物上的储氧组分的第三层。