| 摘要 |
Sulfur dioxide is removed from a fluid containing SO2 by employing as an absorbent therefor an aqueous solution of compound represented by Formula I: -N=; each Y is independently -(CR22)-, -(C=O)-, -O-, -NR1-, -N=, or -C(R2)=; each R1 or R2 is independently hydrogen; an alkyl group; a hydroxyalkyl group; an aldehyde group; a carboxylic acid or salt group; or an alkyl group containing an aldehyde group, a carboxylic acid or salt group, ketone, carboxylic ester, ether, or sulfoxide group; and m is an integer preferably of from 2 to about 4. The absorbent solution preferably can be thermally regenerated by heating to remove SO2.
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