Patent ID: 9248440
Filing Date: 2016-02-02
CPC Classification: B01D,B01J,C04B,Y10T

Claim Text:
1. A honeycomb structure comprising: porous partition walls with which a plurality of cells are formed to become through channels of a fluid and which are provided with a plurality of pores, wherein a porosity of the partition walls is from 45 to 70%, and wherein pores having a maximum width in excess of 10 μm in a cross section of each of the partition walls, which is parallel to a thickness direction of the partition wall, are large pores, wherein the partition wall is equally divided into three regions of a center region and surface layer regions present on both sides of the center region along the thickness direction, in the cross sections of the surface layer regions of the partition wall which are parallel to the thickness direction, a total area of cross sections of the large pores present in the cross sections of the surface layer regions is from 60 to 100% of a total area of cross sections of all the pores present in the cross sections of the surface layer regions, and in the cross section of the center region of the partition wall which is parallel to the thickness direction, a total area of cross sections of the large pores present in the cross section of the center region is from 0 to 40% of the total area of cross sections of all the pores which appear in the cross section of the center region.