Method for simultaneously abating nitric oxides and nitrous oxides in gases containing them
US6890501B2 · kind B2 · utility
13Cited by
6References
9Claims
0Family size
Inventors
Key dates
| Filing date | Aug 17, 2001 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | May 24, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention concerns a method for purifying flue gases before they are released into the atmosphere of their nitrogen oxides N2O and NOx by reaction with ammonia by causing them to circulate at temperatures between 200 and 600° C. on a catalyst based on beta-zeolite loaded with iron. The invention is particularly useful for treating tail gases from factories producing nitric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.