Production of a homogeneous multi-element filter for use in catalytic filters for cars, involves selecting filter elements on the basis of a pre-determined criterion of homogeneity for the uncoated support material

摘要

A method for the production of a homogeneous multi-element filter structure of the honeycomb type for catalytic applications, e.g. as a particle filter in a car exhaust, involves (c) prior determination of a criterion of homogeneity for the support material constituting the elements in the absence of a catalyst coating and (d) selection of elements using this criterion, so as to obtain a structure suitable for the homogeneous deposition (within an element and from one to another) of a catalyst for the gas-phase treatment of pollutants. An independent claim is included for a homogeneous filter structure for catalytic applications, obtained by this method.