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1. (WO2005105673) METAL MIXED OXIDE POWDER CONTAINING NOBLE METAL

Pub. No.:    WO/2005/105673    International Application No.:    PCT/EP2005/004125
Publication Date: Fri Nov 11 00:59:59 CET 2005 International Filing Date: Wed Apr 20 01:59:59 CEST 2005
IPC: C01G 19/00
Applicants: DEGUSSA AG
KATUSIC, Stipan
PETRAT, Frank-Martin
KRÄMER, Michael
ZIMMERMANN, Guido
WOMBACHER, Willlibald
STAAB, Edwin
Inventors: KATUSIC, Stipan
PETRAT, Frank-Martin
KRÄMER, Michael
ZIMMERMANN, Guido
WOMBACHER, Willlibald
STAAB, Edwin
Title: METAL MIXED OXIDE POWDER CONTAINING NOBLE METAL
Abstract:
Aggregated, doped metal mixed oxide powder having a BET surface area of 30 to 150 m²/g, wherein the doping component is at least one noble metal and the content of noble metal is 0.1 to 20 wt.% and wherein the ratio of noble metal on the surface to the total amount of noble metal is at least 0.1. It is produced by pyrolysing compounds containing the metal component of the mixed metal oxide in a first zone in a flame consisting of hydrogen and air and metering a noble metal compound and reducing gas into the pyrolysis mixture in a second zone and separating off the solid obtained in a third zone. The mixed oxide powder doped with noble metal can be used as a catalyst.