Method and apparatus for regulating the NH.sub.3 content in scrubbing liquid used in a gas scrubbing process
US4522638A · kind A · utility
8Cited by
11References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 1984 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | May 22, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/1456
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for regulating the NH.sub.3 content in an organic liquid that acts as a physical scrubbing agent and is used in a procedure for absorbing sour gases from gaseous mixtures. To ensure undisturbed and reliable carrying out of the scrubbing process, an ammonia-precipitating precipitant is added to the scrubbing agent and the precipitate is then separated from the scrubbing agent. Preferred precipitants include sulphuric acid and phosphuric acid. The ammonia salts are effective fertilizers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.