Separation of ammonia from ammonia containing gases
US4287162A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1979 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Jul 18, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the separation and recovery of substantially pure ammonia from its admixture with gases, particularly with gases containing carbon dioxide and gases obtained from the catalytic ammoxidation of hydrocarbons to the corresponding nitriles, by scrubbing the ammonia containing gases with an aqueous solution containing a mixture of salts having different cations and the anions of one or more inorganic acids capable of absorbing and liberating ammonia; e.g., mixtures of different alkali metal salts of phosphoric, telluric, boric, vanadic, chromic, selenic, germanic, silicic and similar acids. Preferably the anion component will be at least one of phosphoric, chromic, or boric acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.