| abstract |
I) Bonded to a quaternary carbon atom in a compound of Formula 1 having at least one amino group, carboxylate and hydroxyl group bonded to a tertiary carbon atom in the molecule, each having one or more functional groups The present invention relates to a mixed absorbent for carbon dioxide separation comprising a compound of Formula 2 having at least one amino group and a carboxylate salt as functional groups, and ii) an amine series compound that promotes the reaction. The absorbent for separation of carbon dioxide according to the present invention is effective because it has a higher unit absorbency of carbon dioxide than a conventionally used absorbent, and the difference in the amount of absorption due to temperature is relatively high. The energy required for regeneration can be reduced, and it is also economically effective. In addition, since the compounds present in the carboxylate form are mixed and used, it has excellent solubility, has a high boiling point, has no fear of evaporation, and is advantageous for industrialization with reasonable operating costs. . [Selection] Figure 2 |