Patent ID: 8545783

Claim:
An acid gas absorbent comprising at least one type of tertiary amine compound represented by the following general formula (1) where, in the above formula (1), the cycle A represents a cyclic structure whose carbon number is not less than 3 nor more than 8, R 1 and R 2 each represent an alkyl group whose carbon number is 1 to 4, R 3 represents an alkyl group whose carbon number is 1 to 4, and R 4 represents a hydroxyalkyl group; R 1 and R 2 are groups coupled to carbon atoms adjacent to a carbon atom forming the cycle A and coupled to a nitrogen atom; R 1 and R 2 may be the same or may be different; “m” and “n” each represent an integer number of 0 (zero) to 2; and 1≦m+n≦4.