Zeolite catalyst and preparation process for NOx reduction
US7049261B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 26, 2003 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Mar 1, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A zeolite catalyst and a process for preparing a zeolite catalyst which is both capable of catalyzing the removal of nitrogen oxides from a gaseous medium across a broad temperature range and is operationally and hydrothermally stable at high reaction temperatures. The zeolite catalyst includes a zeolite carrier having a mole ratio of typically from about 14 to about 95 and copper ions supported on the zeolite carrier. The zeolite catalyst is prepared by providing a zeolite carrier, reacting copper with the zeolite carrier by carrying out an ion exchange reaction in a cupric salt aqueous solution at a temperature of between about 4° C. and room temperature (25° C.), and then drying and calcining the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.