SULFUR DIOXIDE REMOVAL FROM GAS STREAMS USING HYDROXYALKYL SUBSTITUTED PIPERAZINONES

摘要

SO2 is removed from a gas stream by absorbing the SO2 in an aqueous solution containing a 4-(2-hydroxyalkyl)-2-piperazinone compound or an alkyl or aryl substituted derivative thereof. These compounds provide absorbent solutions that are less subject to SO2 loss during the regeneration step and yet effectively remove the SO2 from the gas stream without interference from other associated gases.