Method for removing sulfur oxide from waste gases and recovering elemental sulfur
A continuous catalytic fused salt extraction process is described for removing sulfur oxides from gaseous streams. The gaseous stream is contacted with a molten potassium sulfate salt mixture having a dissolved catalyst to oxidize sulfur dioxide to sulfur trioxide and molten potassium normal sulfate to solvate the sulfur trioxide to remove the sulfur trioxide from the gaseous stream. A portion of the sulfur trioxide loaded salt mixture is then dissociated to produce sulfur trioxide gas and thereby regenerate potassium normal sulfate. The evolved sulfur trioxide is reacted with hydrogen sulfide as in a Claus reactor to produce elemental sulfur. The process may be advantageously used to clean waste stack gas from industrial plants, such as copper smelters, where a supply of hydrogen sulfide is readily available.
- Assignee:
- Battelle Memorial Inst.
- Patent Number(s):
- US 4041142
- OSTI ID:
- 6436906
- Resource Relation:
- Patent File Date: Filed date 8 Dec 1975
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
FLUE GAS
DESULFURIZATION
POLLUTION CONTROL EQUIPMENT
OPERATION
SULFUR
RECOVERY
SULFUR OXIDES
AIR POLLUTION CONTROL
CATALYSIS
INDUSTRIAL PLANTS
POTASSIUM SULFATES
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
EQUIPMENT
GASEOUS WASTES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POTASSIUM COMPOUNDS
SULFATES
SULFUR COMPOUNDS
WASTES
424000* - Engineering- Pollution Control Equipment- (1980-1989)
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management