| abstract |
The invention relates to novel polyamines of formula (I), derived from the reaction between a polyol diglycidyl ether and piperazine: n integer between 0 and 30, R1 of various forms, R2 of formula (g5), and R2 of formula (g6) when n=0; R6: H, C1-C6 alkyl or hydroxyalkyl radical, R7: C1-C6 alkyl or hydroxyalkyl radical, R6 and R7 possibly being joined to form a heterocycle containing 5, 6, 7 or 8 atoms when R6 is other than H, R8: H, C1-C4 alkyl or hydroxyalkyl radical. The invention also relates to the method for the preparation thereof, and the use of same in an absorbent solution based on amines for selectively eliminating H2S from a gaseous effluent containing H2S and CO2. |