Patent ID: 8906135

Claim:
A method of separating a gas from a gaseous mixture with a liquid ionic compound comprising the step of contacting the gaseous mixture with a liquid ionic compound, wherein said liquid ionic compound comprises a compound of the formula: wherein R 1 , R 2 , and R 3 each are independently selected from the group consisting of: (i) H; (ii) halogen; (iii) C 1 to C 25 straight-chain, branched or cyclic alkane or alkene, optionally substituted with at least one member selected from the group consisting of Cl, Br, F, I, OH, and SH; (iv) C 1 to C 25 straight-chain, branched or cyclic alkane or alkene comprising one to three heteroatoms selected from the group consisting of O, N, Si and S, and optionally substituted with at least one member selected from the group consisting of Cl, Br, F, I, OH, NH 2 and SH; (v) C 6 to C 20 unsubstituted aryl, or C 3 to C 25 unsubstituted heteroaryl having one to three heteroatoms independently selected from the group consisting of O, N, Si and S; and, (vi) C 6 to C 25 substituted aryl, or C 3 to C 25 substituted heteroaryl having one to three heteroatoms independently selected from the group consisting of O, N, Si and S; and wherein said substituted aryl or substituted heteroaryl has one to three substituents independently selected from the group consisting of: (1) C 1 to C 25 straight-chain, branched or cyclic alkane or alkene, optionally substituted with at least one member selected from the group consisting of Cl, Br, F, I, OH, NH 2 and SH, (2) OH, (3) NH 2 , and, (4) SH; wherein X is an anion; and wherein the gas separated is CO 2 .