Ifp Energies Nouvelles

Nicolas Laloue

Bruno Delfort

Thierry Huard

Aurelie Wender

Gauthier Perdu

Catherine Lefebvre

Sebastien Gonnard

Agnes Leroy

Aurélie Wender

Antoine Nicola

Karine Gaillard

Agnès Leroy

The invention concerns novel polyamines having formula (I) obtained from the reaction between a polyol diglycidylether and piperazine: in which n is a whole number between 0 and 30, Rhas different forms, Rhas formula (g), and Rhas formula (g) when n=0  The invention also concerns their preparation method and their use in an absorbing solution based on amines in order to selectively eliminate HS from a gaseous effluent containing HS and CO.

Polyamines, synthesis process thereof and use of same for the selective elimination of HS from a gaseous effluent comprising CO

Method of decarbonating a hydrocarbon gas, a natural gas for example, by washing with a solvent. Said gas is contacted with an absorbent solution so as to obtain a CO-depleted gas and a CO-laden absorbent solution. The CO-laden absorbent solution is then heated and expanded at a predetermined pressure and temperature so as to release a hydrocarbon-containing gaseous fraction and to obtain a hydrocarbon-depleted absorbent solution, said pressure and temperature being so selected that said gaseous fraction comprises at least 50% of the hydrocarbons contained in said CO-laden absorbent solution and at most 35% of the COcontained in said CO-laden absorbent solution. Finally, the hydrocarbon-depleted absorbent solution is thermally regenerated so as to release a CO-rich gaseous effluent and to obtain a regenerated absorbent solution.

Hydrocarbon gas decarbonation method

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Lyons, France

Nicolas Laloue