| 摘要 |
PROBLEM TO BE SOLVED: To provide an acidic gas absorption liquid for recovering a large amount of acidic gas by virtue of a temperature change upon the storage and release, and to provide an acidic gas separation recovery method using the acidic gas absorption liquid.SOLUTION: The acidic gas absorption liquid contains an ion liquid composed of cation and anion, the anion is a carboxylate ion, at least one of the cation and the anion is ion having a hydroxyl group, the carboxylate ion is saturated or unsaturated hydrocarbon, or hetero atom -containing hydrocarbon of which the base aggregate is non-substituted or has a substituted group and the hetero atom is at least one atom selected from a group consisting of oxygen atom, sulfur atom and phosphorous atom. Further, the acidic gas separation recovery method includes an absorption step of bringing the acidic gas absorption liquid into contact with a mixed gas containing the acidic gas, thereby, absorbing the acidic gas into the acidic gas absorption liquid and selectively separating the acidic gas from the mixed gas.SELECTED DRAWING: None |
