发明名称 |
CATALYST FEATURING SILICONE DIOXIDE BASED SUPPORT MATERIAL FOR THE PURIFICATION OF EXHAUST GASES |
摘要 |
Catalyst has a catalytically active coating on an inert honeycomb body made from a ceramic or metal. The coating contains platinum, palladium, rhodium or iridium on a finely divided oxidic support material based on silicon dioxide. The support material has low porosity and is composed of aggregates of spherical primary particles having an average diameter of 7-60 nm. An Independent claim is also included for a process for the production of the catalyst comprising coating a honeycomb body with a suspension containing a platinum group metal deposited on an oxidic support material, in which the support material is in a spray-dried form having a tamped density or more than 200 g/l. Preferred Features: The support material has an average particle diameter of 20-50 nm and a pore radius distribution of more than 20 nm. The support material is doped with 0.05-1 wt.% aluminum oxide. The coating additionally contains a dealuminized zeolite, beta-zeolite or a ZSM-5 zeolite. |
申请公布号 |
ZA200400931(B) |
申请公布日期 |
2005.03.30 |
申请号 |
ZA20040000931 |
申请日期 |
2004.02.04 |
申请人 |
UMICORE AG. & CO. KG., |
发明人 |
Egbert LOX;Ulrich NEUHAUSEN;Thomas KREUZER;Harald KLEIN;Jurgen GIESHOFF |
分类号 |
B01J;F01N3/10;B01D53/94;B01J21/08;B01J23/40;B01J23/42;B01J29/12;B01J29/44;B01J29/80;B01J35/02;B01J35/04;B01J35/10;B01J37/00;B01J37/02;B01J37/08;F01N3/28 |
主分类号 |
B01J |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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