A method of removing SO2 from {HEAD ~ a gas stream} containing the same by absorbing the SO2 in an aqueous solution containing {TAIL ~ a 4 2 piperazinone compound} or an alkyl or aryl substituted derivative thereof 
A method of removing SO2 from { HEAD ~ a gas stream } containing the same by absorbing the SO2 in an aqueous solution containing { TAIL ~ a 4 2 piperazinone compound } or an alkyl or aryl substituted derivative thereof
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH