Abstract: A process and device for separating a mixture of substances by sorption of the components of the mixture on two different sorption agents with independently adjustable sorption properties. The process is characterized in that the mixture of interest is introduced into a gap between two surfaces of sorption agents. A gap medium in which the components of the mixture are soluble and/or dispersible and/or in which they can be evaporated is located between the facing surfaces of the sorption agents (1,2). Of the three different phases consisting of surfaces and gap medium at least two move in different directions at a substantially constant distance apart, and the separated components of the mixture located on the sorption means are extracted after passing through the separating section.