Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – And additional al or si containing component
Patent
1993-04-20
1994-12-06
Dees, Carl F.
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
And additional al or si containing component
502 74, 502242, 502247, 502326, 502327, 502350, 502353, B01J 2100, B01J 2322, B01J 2340, B01J 2904
Patent
active
053710568
ABSTRACT:
An oxidative diesel control catalyst is disclosed which has a high conversion rate for hydrocarbons and carbon monoxide and an inhibited oxidation effect on nitrogen oxides and sulfur dioxides and which contains a monolithic catalyst element with throughflow passages of ceramic or metal coated with an activity-promoting dispersion coating of the fine-particle metal oxides aluminum oxide, titanium oxide, silicon oxide, zeolite or mixtures thereof as support of the catalytically active components, the active components being present in the form of platinum, palladium, rhodium and/or iridium doped with vanadium or in contact with an oxidic vanadium compound. The reduced oxidation effect on sulfur dioxide is obtained by virtue of the fact that the fine-particle metal oxides are surface-modified aluminum oxide, titanium oxide, silicon oxide, zeolite or mixtures thereof. The surface modification is a coating of the specific surface of the metal oxides with a layer of titanium dioxide or silicon dioxide of 1 to 5 monolayers.
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patent: 5157007 (1992-10-01), Domesle et al.
Y. Tan et al., "Coated Silica as Support for Platinum Catalyst," Journal of Catalysis, vol. 129, pp. 447-456 (1991).
Domesle Rainer
Engler Bernd
Leyrer Juergen
Lox Egbert
Dees Carl F.
Degussa - Aktiengesellschaft
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