Patent ID: 7781014
Filing Date: 2010-08-24
Classification: B01J

Abstract:
1. A process for producing a filter catalyst, the process comprising: preparing a coating slurry in which an inorganic oxide powder is dispersed, and coating the coating slurry onto a catalyst-support substrate composed of a porous material having a plurality of cells extending in an axial direction, the catalyst-support substrate having first and second opposite ends in the axial direction, a first set of the cells having sealed first ends, and a second set of the cells which alternate with the first set having sealed second ends; removing excess coating slurry from the coated catalyst-support substrate; and drying-calcining the coating slurry; wherein the removing of the excess coating slurry is carried out by performing the following steps repeatedly until a porosity of the filter catalyst with pore diameters between 1 μm to 20 μm is 12.53% to 13.29% and the porosity of the filter catalyst with pore diameters between 20 μm to 70 μm is 27.11% to 28.03%: