Method for producing a catalytic structure for the reduction of nitrogen oxides
US4520124A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1983 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Sep 12, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is provided for producing a catalytic structure in the form of sheet or honeycomb for the gas phase reduction of nitrogen oxides. The method comprises: beating an inorganic fiber in water to form a slurry; forming the slurry into a sheet by paper-making means and drying the sheet; impregnating the sheet or a honeycomb structure manufactured therefrom which has a porosity of 60-85% with an impregnating slurry which contains titanium dioxide or its precursor in a concentration at least of 100 g/l and has a viscosity of 5-250 cps. at normal temperatures, drying, and when necessary calcining the structure; and then immersing the structure in a solution containing a catalytically active agent or its precursor, drying and calcining the structure, thereby to provide a porous catalytic structure having titanium dioxide and the catalytically active agent substantially uniformly dispersed and supported therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.