Absorbing SO/sub 2/ with polyacrylic acid solution
Patent
·
OSTI ID:7361450
In the recovery of sulfur dioxide (SO/sub 2/) from an SO/sub 2/-containing gas by contacting said gas with an aqueous absorbing solution, thereafter treating said solution to remove the SO/sub 2/ therefrom at least in part, and recycling the SO/sub 2/-freed absorbing solution, the improvement which comprises employing as said absorbing solution an aqueous solution of a polyalkenoic acid such as polyacrylic acid or polymethacrylic acid of a molecular weight of at least about 200. Preferably the molecular weight of the polyalkenoic acid is below about 6000 and the pH of the solution is about 3.2 to 4. The SO/sub 2/ is removed from the absorbing solution almost quantitatively with H/sub 2/S, sulfur being produced in the reaction.
- Assignee:
- Celanese Corp.
- Patent Number(s):
- US 3907972
- OSTI ID:
- 7361450
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
CARBOXYLIC ACIDS
CHALCOGENIDES
EQUIPMENT
ESTERS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
METHACRYLIC ACID
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
POLLUTION CONTROL EQUIPMENT
POLYACRYLATES
POLYMERS
POLYVINYLS
RECOVERY
SCRUBBERS
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
CARBOXYLIC ACIDS
CHALCOGENIDES
EQUIPMENT
ESTERS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
METHACRYLIC ACID
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
POLLUTION CONTROL EQUIPMENT
POLYACRYLATES
POLYMERS
POLYVINYLS
RECOVERY
SCRUBBERS
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES