Method of removing nitrogen oxides from plant exhaust
US3932585A · kind A · utility
11Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1973 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Sep 6, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of removing a nitrogen oxide from an exhaust containing the same which comprises preparing an absorbent solution by adding divalent copper ions alone or a mixture of the divalent copper ions and divalent manganese ions to an acid aqueous solution containing sulfites or acid sulfites of ammonium, alkaline metals, or alkaline earth metals or a mixture of two or more of these compounds; and introducing the plant exhaust into the absorbent solution to carry out reaction between the sulfite radical of the absorbent solution and the nitrogen oxides contained in the exhaust to reduce the nitrogen oxides to nitrogen gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.