Patent ID: 7157070

Claim:
A process for removing H 2 S, mercaptans and CO 2 from a hydrocarbonaceous feed gas wherein the feed gas is supplied to an absorption plant operated at a pressure of 20 to 80 bar abs and supplied with a solvent which selectively absorbs H 2 S; a solvent stream loaded with H 2 S and a roughly desulfurized gas stream, desulfurized to a H 2 S content of 100 to 10,000 ppmV, are withdrawn from the absorption plant; the solvent stream loaded with H 2 S is charged to a regeneration plant and the roughly desulfurized gas stream is charged to an absorption and regeneration plant operated with a pressure of 20 to 80 bar abs ; a first expansion gas stream, consisting essentially of hydrocarbon and CO 2 , and a first waste gas stream, consisting essentially of H 2 S, CO 2 and a minor amount of mercaptans, are withdrawn from the regeneration plant for the solvent stream loaded with H 2 S and are supplied to a Claus plant; and a valuable gas stream provided for a further utilization is withdrawn from the absorption and regeneration plant for the desulfurized gas stream.