METHOD FOR THE SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM GASEOUS MIXTURES AND THE USE OF THIOALCANOL FOR THE SELECTIVE REMOVAL OF HYDROGEN SULFIDE

摘要

A process for selectively removing hydrogen sulfide from carbon dioxide in a gaseous mixture containing at least hydrogen sulfide HS and carbon dioxide CO, comprising a step of contacting said gaseous mixture with an absorbent solution comprising, preferably consisting of, at least one amine, water, and at least one C -C thioalkanol. Use of said absorbent solution for selectively removing hydrogen sulfide from carbon dioxide in a gaseous mixture containing at least hydrogen sulfide and carbon dioxide. Use of at least one C to C thioalkanol as an additive to an absorbent solution comprising, preferably consisting of, at least one amine, and water, to increase the selectivity of said absorbent solution for removal hydrogen sulphide with respect to carbon dioxide in a gaseous mixture containing at least hydrogen sulphide and carbon dioxide.