METHOD FOR REFINING CARBON DIOXIDE

摘要

PROBLEM TO BE SOLVED: To separate and recover carbon dioxide from an exhaust gas and the like easily and at a high purity.SOLUTION: In a method for refining carbon dioxide, a carbon dioxide absorption step to generate a cyclic carbonate compound by reacting an intramolecular dehydrohalogenated compound of a compound having a hydroxyl group and a halogen group in an intramolecular basic skeleton with carbon dioxide and a carbon dioxide regeneration step to generate carbon dioxide by decomposing the cyclic carbonate compound at a higher temperature than the decomposition temperature of a cyclic carbonate structure in the cyclic carbonate compound and at a lower temperature than the decomposition temperature of the basic skeleton are performed in order.