Catalytic reduction of nitrogen oxides
US4874590A · kind A · utility
34Cited by
43References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Apr 7, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2255/20746
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a method for catalytically reducing one or more nitrogen oxides from a gaseous stream containing one or more nitrogen oxides and one or more sulfur oxides which comprises contacting said gaseous stream and ammonia with a microporous non-zeolitic molecular sieve composition at effective reduction conditions, wherein said microporous non-zeolitic molecular sieve composition is (i) optionally acid treated with an inorganic or organic acid, (ii) hydrogen-forming cation exchanged and (iii) optionally metal cation exchanged, prior to said contacting in said method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.