Process for the separation of NH.sub.3 from a gaseous mixture containing NH.sub.3 and HCN
US4094958A · kind A · utility
2Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1977 |
| Grant date | Jun 13, 1978 |
| Priority date | — |
| Expiry date | Apr 5, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01C1/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the separation of ammonia from a gaseous mixture containing ammonia and hydrogen cyanide which comprises contacting said gaseous mixture in an absorption stage with an absorbent liquor comprising an acidified ammonium nitrate solution thereby selectively absorbing ammonia from said gaseous mixture and forming a solution of diminished acidity, adding nitric acid to the ammonium nitrate-containing solution of diminished acidity to restore its acidity to its initial level and recycling said restored solution to said absorption stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.