Two-stage offgas scrubbing

A process for removing organic constituents from a gas stream in a two-stage scrubbing operation, wherein

• the gas stream is scrubbed in a first scrubbing unit with a liquid alcoholic scrubbing medium, causing the organic constituents in the gas stream being scrubbed to pass over at least partially into the scrubbing medium, and producing a gas stream with a reduced content of organic constituents, which contains some of the alcoholic scrubbing medium as alcoholic constituents, and an alcoholic scrubbing medium laden with organic constituents;
• and
• the gas stream with a reduced content of organic constituents is scrubbed in a second scrubbing unit with an aqueous scrubbing medium, causing the alcoholic constituents to pass over at least partially into the scrubbing medium and producing a gas stream with a reduced content of organic and alcoholic constituents and an aqueous scrubbing medium laden with alcoholic constituents;
• wherein in both scrubbing units at least 0.7 kg of scrubbing medium is used per m3 of gas stream being scrubbed and at least 4 kg of scrubbing medium are used per kg of organic constituents to be removed, and in that
• the alcoholic scrubbing medium laden with organic constituents is sent to a reaction in which the alcohol is used as a reactant, and the aqueous scrubbing medium laden with alcoholic constituents is sent into a process in which the water is used as a feedstock or extractant.