Absorbent for the selective removal of hydrogen sulfide from...

Details Absorbent for the selective removal of hydrogen sulfide from... Absorbent for the selective removal of hydrogen sulfide from...

B - Operations, Transporting

01

D

B01D 53/14 (2006.01)

Patent

CA 2760732

An absorbent for removing acid gases from a fluid flow comprises an aqueous solution of a) at least one amine and b) at least one phosphonic acid, wherein the molar ratio of b) to a) ranges between 0.0005 and 1Ø For example, the phosphonic acid is 1-hydroxyethane-1, 1-diphosphonic acid. Compared to absorbents based on amines or amine/promoter combinations, the absorbent requires less regeneration energy without substantially reducing the solution's capacity to absorb acid gases.

L'invention porte sur un milieu d'absorption pour extraire des gaz acides à partir d'un courant de fluide, qui comprend une solution aqueuse a) d'au moins une amine et b) d'au moins un acide phosphonique, le rapport molaire de b) à a) étant dans la plage de 0,0005 à 1,0. L'acide phosphonique est par exemple l'acide 1-hydroxyéthane-1,1 disphosphonique. Le milieu d'absorption montre, par rapport aux milieux d'absorption à base d'amines ou de combinaisons amine promoteur un besoin d'énergie de régénération réduit, sans diminuer sensiblement la capacité d'absorption de la solution pour les gaz acides.

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