Method for producing an SCR catalytic converter by way of pre-drying
AssigneeUmicore AG & Co. KG
InventorsBenjamin Barth, Martin Foerster
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for producing automobile exhaust gas catalytic converters, to the catalytic converters as such and to the use thereof. In particular, the method comprises a step which results, independently of the actual drying process, in the catalytically active material used being dried. The invention is especially used in the coating of wall-flow filters.
Claims18
Method for producing a catalyst containing zeolites or zeotypes for the aftertreatment of exhaust gases of an internal combustion engine, characterized in that the zeolite or the zeotype is a metal ion-exchanged zeolite or zeotype and, after it is coated onto and/or into a support, is pre-dried in such a way that a gas stream is guided through the support for a sufficient period of time and with a sufficient intensity, so that the solids content in the applied washcoat layer is set to 45%-60% before the support is completely dried and/or calcined.
Dependencies are inferred from the claim text.