Aqueous solutions of amine functionalized ionic compounds for carbon capture processes

摘要

An aqueous ionic absorbent solution is disclosed containing (a) about 15 wt. % to about 80 wt. % of one or more diluents, based on the total weight of the aqueous ionic absorbent solution; and (b) an ionic absorbent containing a cation and an anion comprising an amine moiety.

主权项

1. An aqueous ionic absorbent solution comprising (a) about 40 wt. % to about 80 wt. % of one or more diluents, based on the total weight of the aqueous ionic absorbent solution; and (b) an ionic absorbent containing a cation and an anion comprising an amine moiety, wherein the cation comprises one or more cations selected from the group consisting of an ammonium cation and a phosphonium cation, wherein the anion comprising an amine moiety is represented by the general formula:
R1—N(R1)-(L)-A− wherein R1 is the same or different and includes hydrogen, a straight or branched C1 to C30 substituted or unsubstituted alkyl group, a C1 to C20 ester-containing group, a substituted or unsubstituted C3 to C30 cycloalkyl group, a substituted or unsubstituted C3 to C30 cycloalkylalkyl group, a substituted or unsubstituted C3 to C30 cycloalkenyl group, a substituted or unsubstituted C5 to C30 aryl group, a substituted or unsubstituted C5 to C30 arylalkyl group, a substituted or unsubstituted C5 to C30 heteroaryl group, a substituted or unsubstituted C3 to C30 heterocyclic ring, a substituted or unsubstituted C4 to C30 heterocycloalkyl group, a substituted or unsubstituted C6 to C30 heteroarylalkyl group, wherein if one R1 group is hydrogen, then the other R1 group is not hydrogen, or R1 and R1 together with the nitrogen atom to which they are bonded are joined together to form a heterocyclic group; L is a linking group; and A− is an anionic moiety, and further wherein the aqueous ionic absorbent solution has a viscosity of about 0.1 to about 100 centistokes (cSt).