Title:
内燃機関からの排気ガスを精製するための担持材料に基づく二酸化珪素を含有する触媒
Document Type and Number:
Japanese Patent JP2005503255
Kind Code:
A
Abstract:
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.
Inventors:
Halalto klein
Ulrich Neuhausen
Egbert Rocks
Jürgen Guieshof
Thomas Kreuzer
Ulrich Neuhausen
Egbert Rocks
Jürgen Guieshof
Thomas Kreuzer
Application Number:
JP2003528677A
Publication Date:
February 03, 2005
Filing Date:
August 08, 2002
Export Citation:
Assignee:
Umicore AG & Co.KG
International Classes:
F01N3/10; B01D53/94; B01J21/08; B01J23/40; B01J23/42; B01J29/12; B01J29/80; B01J35/02; B01J35/04; B01J35/10; B01J37/00; B01J37/02; B01J37/08; F01N3/28; B01J29/44; (IPC1-7): B01J23/42; B01D53/94; B01J29/12; B01J29/80; F01N3/10; F01N3/28
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Reinhard Einsel