Patent ID: 7481988

Claim:
A method for obtaining an acid gas stream having a pressure of from 3 to 30 bar by removal of the acid gases from a fluid stream comprising as impurities H 2 S and optionally other acid gases, the molar fraction of H 2 S, based on the total amount of acid gases, being at least 50 mol %, which comprises a) in at least one absorption step, bringing the fluid stream into intimate contact with a liquid absorption medium and thus producing a fluid stream substantially freed from acid gases and an acid-gas-loaded liquid absorption medium (step a), b) separating from one another the fluid stream substantially freed from acid gases and the acid-gas-loaded liquid absorption medium (step b), c) separating, by heating and optionally expansion or stripping, the acid-gas-loaded liquid absorption medium into an acid gas stream having a pressure of from 3 to 30 bar and a regenerated liquid absorption medium (step c) d) passing the regenerated liquid absorption medium into a heat exchanger and cooling it there, by using a part of its thermal energy to heat up the acid-gas-loaded liquid absorption medium in step (c) (step d) e) recirculating the regenerated liquid absorption medium to step a) (step e).