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1. 发明专利

DE69516281D1 未知
公开(公告)号：DE69516281D1
公开(公告)日：2000-05-18
申请号：DE69516281
申请日：1995-02-14
申请人： ENGELHARD CORP
发明人： CHEN SHAU-LIN , RABINOWITZ N , TAUSTER J
IPC分类号： B01D53/86 , B01D53/94 , B01J23/58 , B01J23/63 , B01J37/02 , B01J23/56
摘要： 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 substantially 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 is a first layer and a second layer. The first layer comprises a first support; at least one first palladium component, optionally a minor amount of a platinum, optionally a first oxygen storage composition, optionally a zirconium component; optionally at least one first alkaline earth metal components and optionally at least one first rare earth metal component selected from the group consisting of lanthanum metal components and neodymium metal components. The second layer comprises a second support; a second platinum component; a rhodium component; a second oxygen storage composition comprising a diluted second oxygen storage component and optionally a zirconium component.

2. 发明专利

DE60216792D1 未知
公开(公告)号：DE60216792D1
公开(公告)日：2007-01-25
申请号：DE60216792
申请日：2002-09-04
申请人： ENGELHARD CORP
发明人： HU ZHICHENG , BURK L , CHEN F , RABINOWITZ N , MINNELLA CHRISTOPHER M , ISRAEL N
IPC分类号： B01D53/94 , F01N3/10 , B01J23/58 , B01J23/63 , B01J23/89 , B01J37/02 , F01N3/28
摘要： Provided are methods for manufacturing a base metal undercoat containing catalyst and an exhaust article containing the catalyst. The catalyst contains a base metal undercoat with an oxygen storage component, substantially free of platinum group metal components, and at least one catalytic layer.

3. 发明专利

DE69529347D1 未知
公开(公告)号：DE69529347D1
公开(公告)日：2003-02-13
申请号：DE69529347
申请日：1995-09-12
申请人： ENGELHARD CORP
发明人： HU ZHICHENG , HECK M , RABINOWITZ N
IPC分类号： B01D53/94 , B01J23/58 , B01J23/63 , F01N3/28 , F01N13/02 , F02B1/04
摘要： 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.

4. 发明专利

DE69516281T2 未知
公开(公告)号：DE69516281T2
公开(公告)日：2000-08-31
申请号：DE69516281
申请日：1995-02-14
申请人： ENGELHARD CORP
发明人： CHEN SHAU-LIN , RABINOWITZ N , TAUSTER J
IPC分类号： B01D53/86 , B01D53/94 , B01J23/58 , B01J23/63 , B01J37/02 , B01J23/56
摘要： 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 substantially 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 is a first layer and a second layer. The first layer comprises a first support; at least one first palladium component, optionally a minor amount of a platinum, optionally a first oxygen storage composition, optionally a zirconium component; optionally at least one first alkaline earth metal components and optionally at least one first rare earth metal component selected from the group consisting of lanthanum metal components and neodymium metal components. The second layer comprises a second support; a second platinum component; a rhodium component; a second oxygen storage composition comprising a diluted second oxygen storage component and optionally a zirconium component.

5. 发明专利

DE60216792T2 未知
公开(公告)号：DE60216792T2
公开(公告)日：2007-10-04
申请号：DE60216792
申请日：2002-09-04
申请人： ENGELHARD CORP
发明人： HU ZHICHENG , BURK L , CHEN F , RABINOWITZ N , MINNELLA CHRISTOPHER M , ISRAEL N
IPC分类号： B01D53/94 , F01N3/10 , B01J23/58 , B01J23/63 , B01J23/89 , B01J37/02 , F01N3/28
摘要： Provided are methods for manufacturing a base metal undercoat containing catalyst and an exhaust article containing the catalyst. The catalyst contains a base metal undercoat with an oxygen storage component, substantially free of platinum group metal components, and at least one catalytic layer.

6. 发明专利

DE69529347T2 未知
公开(公告)号：DE69529347T2
公开(公告)日：2003-11-27
申请号：DE69529347
申请日：1995-09-12
申请人： ENGELHARD CORP
发明人： HU ZHICHENG , HECK M , RABINOWITZ N
IPC分类号： B01D53/94 , B01J23/58 , B01J23/63 , F01N3/28 , F01N13/02 , F02B1/04
摘要： 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.

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