Ceramic honeycomb structure
US7504359B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2004 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Mar 10, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D46/2498
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A honeycomb structural body comprises one or plural pillar-shaped porous ceramic members in which many through-holes are arranged side by side in a longitudinal direction through partition walls and either one end portions of these through-holes are sealed.The partition wall forming the structural body has a surface roughness of not less than 10 μm as a maximum roughness Rz defined in JIS B0601-2001 and an average pore size of 5-100 μm in a pore distribution measured by a mercury pressure method, and satisfies the following relationship:A≧90−B/20 or A≦100−B/20when a ratio pores having a pore size of 0.9-1.1 times the average pore size to total pore volume is A (%) and a thickness of the partition wall is B (μm), and there is proposed an effective honeycomb structural body having excellent pressure loss and catching efficiency and a high catalyst reactivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.