Oxidation catalyst with increased water vapour and dust resistance

摘要

Catalyst comprises palladium and/or platinum, and oxides of silicon, titanium, and tungsten, where the catalyst is present in the form of a solid extrudate containing oxides of silicon, titanium, and tungsten, whose external layer is impregnated with palladium and/or platinum, or in the form of a supported catalyst, where a layer is applied on a carrier body, which comprises palladium and/or platinum, and oxides of silicon, titanium, and tungsten. Independent claims are also included for: (1) a composition comprising silicon dioxide, titanium dioxide, tungsten dioxide, a solvent and at least one binding agent including a silicon-containing and/or titanium-containing compound; (2) preparing the catalyst comprising the above composition, comprising either processing the composition into the solid extrudate or applying the composition in the form of the outer layer on the carrier body; and (3) an exhaust gas purifying catalyst component comprising the above mentioned catalyst.