| 摘要 |
<p>PURPOSE:To obtain a carbon dioxide absorbent having a high rate of CO2 absorption together with a large CO2 dissolving capacity by mixing an amine based absorbent that forms no compound with CO2 and another amine based absorbent that forms a compound with CO2 in a specified ratio. CONSTITUTION:The absorbent for separating CO2 from a gas contg. CO2 is obtained by adding the amine based absorbent that forms a compound with CO2 to the amine based absorbent that forms no compound with CO2 in an amount equivalent to 10 to 50wt.% of the amount of the latter amine based absorbent. As the amine based absorbent that forms no compound with CO2, an amino compound having a steric hindrance substituent such as an alkyl or cycloalkyl group on the carbon atom directly bonded to the nitrogen atom of the amino group of 2-amino-2-methyl-1-propanol or 2-amino-2-methylpropionic acid, etc., is used. As the amine based absorbent that forms a compound with CO2, an amino compound which is similar to the above amino compound, but contains no substituent, such as monoethanolamine, is used.</p> |
