Sulphur trioxide absorption apparatus and process
US4654205A · kind A · utility
7Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1986 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Jan 15, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/806
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An absorption tower for absorbing sulphur trioxide in sulphuric acid having distinct upper and lower packed absorption zones wherein substantially all of the sulphur trioxide is absorbed by the sulphuric acid in the lower zone, while in the upper zone the depleted gas stream is significantly cooled. The two zones receive feed acids of different temperatures and different acid irrigation rates. The tower allows of improved energy recovery while providing for environmentally acceptable emission standards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.