Method for separation of impurities from flowing gas
US4859438A · kind A · utility
11Cited by
4References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Jun 29, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/68
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Method of separating substances, notably SO.sub.2 and NO.sub.x where x is 1 or 2, from cooled flue gases, such as combustion exhaust gases containing low levels of impurities of the same. The gases are contacted with at least one substantially dry particulate absorbent including NaHCO.sub.3 which, at a release temperature below 400.degree. C., decomposes to form an activated absorbent including Na.sub.2 CO.sub.3 which serves to remove the harmful substances from the flowing gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.