Process for catalytically reacting gases having a high SO.sub.2 content
US3997655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1975 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Sep 30, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/765
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Gases having a high SO.sub.2 content are catalytically reacted in a contacting zone having a plurality of series-connected contacting trays. A partial stream of partly reacted gases from the contacting zone containing SO.sub.3 is admixed with the SO.sub.2 containing gas before entering the first contacting tray. The gases are subjected to interstage cooling between contacting trays. At least a portion of the partly reacted gases is passed through an absorber prior to mixing with the feed stock gas having a high SO.sub.2 content. The rate at which SO.sub.3 is absorbed is increased in dependence on the loss of catalyst activity in the contacting zones such that the conversion of SO.sub.2 to SO.sub.3 in the contacting trays remains approximately constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.