Process for staged separation of concomitants from a raw synthesis gas stream to produce synthesis gas by absorption of the concomitants in a physical scrubbing medium run in countercurrent to the raw synthesis gas stream in a plurality of scrubbing stages (PW, MW 1, MW 2) at elevated pressure, wherein the concomitants comprise at least carbon dioxide (CO 2), one or more sulfur compounds of a first type, one or more sulfur compounds of a second type and naphtha, wherein the process comprises the following steps: a) absorbing at least naphtha and sulfur compounds of the first type in a prescrubbing stage to afford a scrubbing medium fraction (106, 109) laden at least with naphtha and sulfur compounds of the first type; b) mixing the laden scrubbing medium fraction (106, 109) obtained in step a) with water to effect a phase separation into two liquid phases, wherein a first liquid phase comprises water and scrubbing medium and a second liquid phase comprises naphtha and sulfur compounds of the first type dissolved therein; c) heating the second liquid phase obtained in step b) to remove the sulfur compounds of the first type and obtain sulfur-free naphtha; d) absorbing carbon dioxide and sulfur compounds of the second type in at least one main scrubbing stage (MW 1, MW 2) arranged downstream of the prescrubbing stage in the gas flow direction to obtain at least one scrubbing medium fraction (114, 115, 116, 117) laden with at least carbon dioxide or sulfur compounds of the second type; e) regenerating the laden scrubbing medium fractions obtained in steps a) and d) and reusing the regenerated scrubbing medium for absorbing concomitants in steps a) and d), wherein the sulfur compounds of the first type comprise at least one element from the group of alkyl mercaptans (R-SH), carbon disulfide (CS 2), thiophenes, the sulfur compounds of the second type comprise at least one element from the group of hydrogen sulfide (H 2 S), carbonyl sulfide, and the scrubbing medium comprises methanol. a) absorbing at least naphtha and sulfur compounds of the first type in a prescrubbing stage to afford a scrubbing medium fraction (106, 109) laden at least with naphtha and sulfur compounds of the first type; b) mixing the laden scrubbing medium fraction (106, 109) obtained in step a) with water to effect a phase separation into two liquid phases, wherein a first liquid phase comprises water and scrubbing medium and a second liquid phase comprises naphtha and sulfur compounds of the first type dissolved therein; c) heating the second liquid phase obtained in step b) to remove the sulfur compounds of the first type and obtain sulfur-free naphtha; d) absorbing carbon dioxide and sulfur compounds of the second type in at least one main scrubbing stage (MW 1, MW 2) arranged downstream of the prescrubbing stage in the gas flow direction to obtain at least one scrubbing medium fraction (114, 115, 116, 117) laden with at least carbon dioxide or sulfur compounds of the second type; e) regenerating the laden scrubbing medium fractions obtained in steps a) and d) and reusing the regenerated scrubbing medium for absorbing concomitants in steps a) and d), the sulfur compounds of the second type comprise at least one element from the group of hydrogen sulfide (H 2 S), carbonyl sulfide, and the scrubbing medium comprises methanol.