Patent ID: 6884282

Claim:
A method for increasing the H 2 S selectivity of absorption from a gas containing CO 2 and H 2 S in a ratio where the CO 2 is significant to the concentration of H 2 S in an amine treating process, the method comprising: a) passing the gas into an aqueous amine-contacting vessel with the aqueous amine; b) maintaining the temperature in the contacting vessel at a temperature between 50 and 150° F. by withdrawing cooling and returning to the contacting vessel a quantity of the aqueous amine; c) recovering a rich aqueous amine solution from the contacting vessel, the rich amine solution being selectively enriched with H 2 S; d) recovering an H 2 S stream having an H 2 S content of at least about 10 volume percent H 2 S from the rich aqueous amine from the contacting vessel; and, e) recovering the gas at least partially depleted of H 2 S from the contacting vessel.