Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2005-04-05
2005-04-05
Silverman, Stanley S. (Department: 1754)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C423S213500, C502S325000, C502S326000, C502S327000
Reexamination Certificate
active
06875725
ABSTRACT:
A starter catalyst for the purification of the exhaust gases from internal combustion engines, which include palladium on aluminum oxide and of barium oxide, as well as a process for its production. The barium oxide and palladium are together deposited in a finely divided state on the supporting material aluminum oxide and the average particle size of the palladium crystallites is between 3 and 7 nm. The small crystallite size of palladium and the barium oxide likewise deposited in finely divided state on the supporting material impart to the catalyst a high activity and long-term stability to high temperature stresses.
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Kreuzer Thomas
Lindner Dieter
Lox Egbert
Mussmann Lothar
Votsmeier Martin
Kalow & Springut LLP
Silverman Stanley S.
Strickland Jonas N.
Umicore AG & Co. KG
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