Ruthenium oxide catalysts for conversion of sulfur dioxide to sulfur trioxide
US7740827B2 · kind B2 · utility
6Cited by
37References
38Claims
0Family size
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Key dates
| Filing date | Sep 25, 2006 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Dec 18, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates generally to catalysts comprising ruthenium oxide and to processes for catalyzing the oxidation and conversion of sulfur dioxide (SO2) to sulfur trioxide (SO3) using such catalysts. SO2 at low concentrations in process gas streams can be effectively oxidized to SO3 at relatively low temperatures using the ruthenium oxide catalysts of the present invention. In one application, the ruthenium oxide catalysts are used in the final contact stage for conversion of SO2 to SO3 in multiple stage catalytic converters used in sulfuric acid manufacture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.