A method and a device for separating off an electrolyte from a first synthesis gas and a second synthesis gas, each containing an electrolyte. The two synthesis gases are each subjected in a scrubbing column to a water scrubbing, in which a substantially electrolyte-free synthesis gas and also a scrubbing water loaded with an electrolyte that has been separated off are obtained. At least a part of the scrubbing water that was loaded with an electrolyte that has been separated off in the scrubbing of the first synthesis gas is used as scrubbing medium in the scrubbing of the second synthesis gas.