Process for purifying gases containing sulphur dioxide
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United States of America Patent
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Dec 17, 1985
Grant Date -
N/A
app pub date -
Sep 6, 1984
filing date -
Sep 8, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for removal of sulphur dioxide from exhaust gases by absorption in an aqueous solution containing ions of adipic acid, and stripping of sulphur dioxide with steam. Solid adipic acid is added to the absorption solution before or during the steam stripping in such an amount that all the acid is dissolved at the stripping temperature, and after the stripping the solution is cooled to substantially below the absorption temperature to precipitate solid adipic acid which is separated off and is added again after the absorption which takes place with a solution which is unsaturated with adipic acid.
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