Removal of nitric oxide from waste gases and recovery as nitric acid
US4925639A · kind A · utility
8Cited by
0References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jan 27, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Jan 27, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is provided for removing nitric oxide from effluent vent or flue gas by subjecting the gas cyclically to scrubbing with a nitric acid stream and to electrolysis of the resulting nitric acid stream containing dissolved nitric oxide to oxidize the dissolved nitric oxide to nitric acid, for purposes of economy, for achieving a useful by-product, and for minimizing environmental pollution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.