Patent ID: 8152903

Claim:
A process for the selective removal of one or more acidic components from normally gaseous mixtures containing such acidic components and CO 2 comprising contacting the normally gaseous mixture with an amino-containing absorbent comprising one or more material of the formula: and all isomers thereof and all isomers thereof, and isomers thereof, wherein R 1 and R 2 are the same or different and are selected from hydrogen methyl, ethyl, C 3 -C 9 substituted or unsubstituted straight or branched alkyl, alkenyl, cycloalkyl, C 6 -C 9 aryl, alkylaryl, arylalkyl; X 1 -X 8 are the same or different and are selected from hydrogen, methyl, ethyl, C 3 -C 9 substituted or unsubstituted straight or branched alkyl, alkenyl, cycloalkyl, C 6 -C 9 aryl, alkylaryl, arylalkyl, a functional group containing one or more oxygens, X 9 and X 10 are the same or different and are selected from —(HO 3 SR 4 ) + , —(HO 3 PR 4 ) + , sulfonates, sulfates, sulfites, phosphates, phosphites, phosphonates, C 1 -C 9 alkylates, adipates, benzoates, X 11 and X 12 are the same or different and are selected from hydrogen, a functional group containing one or more oxygens, wherein when R 1 and/or R 2 are C 2 or greater, the substituent X 11 or X 12 , when other than H, is on the #2 carbon or higher, is zero or 1, z is zero or 1, wherein, when X 1 -X 8 and X 11 and X 12 are not functional groups containing at least one oxygen, at least one of Y and Z is 1, provided that when any of X 1 -X 8 , X 11 or X 12 is a functional group containing a single oxygen at least two of X 1 to X 8 , X 11 or X 12 are such single oxygen containing functional groups and R 4 is selected from C 1 -C 9 alkyl, C 2 -C 9 alkenyl, C 3 -C 9 cycloalkyl, C 6 -C 9 aryl, alkylaryl or arylalkyl, under conditions suitable for the selective removal of one or more of the gaseous acidic components from said mixture.