Method for extracting a gas from a gas mixture, characterised in that the method comprises the following steps: - the provision of a liquid first sorption medium, which upon contact with the gas mixture can at least partially sorb the gas to be extracted; - during a purification step, bringing this first sorption medium into contact with the gas mixture by guiding them together through a purification stage to have the gas to be extracted at least partially sorbed from the gas mixture by the first sorption medium due to the mutual contact, in order to be left with a purified gas mixture with less gas to be extracted and an enriched liquid first sorption medium in which the gas to be extracted from the gas mixture is at least partially sorbed; - the provision of a gaseous second sorption medium that can at least partially extract the gas to be extracted from the enriched liquid first sorption medium upon contact with this enriched liquid sorption medium; - during a regeneration step, bringing this gaseous second sorption medium into contact with the enriched liquid first sorption medium formed during the aforementioned purification step by guiding them together through a regeneration stage, whereby, due to the mutual contact, the sorbed gas to be extracted in the enriched first sorption medium is at least partially sorbed by the second sorption medium and whereby at the output of the regeneration stage an at least partially regenerated liquid first sorption medium is formed that can be reused for a subsequent purification step; - whereby use is made of a venturi ejector with a liquid input and a gas input for the regeneration step, whereby the enriched liquid first sorption medium originating from the purification step is supplied under pressure to the liquid input of this venturi ejector and the gaseous second sorption medium is drawn in via the gas input of this venturi ejector for the contact between the enriched first sorption medium and the second sorption medium and whereby use is made of a circuit in which the liquid first sorption medium is guided around from a first reservoir through the purification stage to a second reservoir in which the enriched first sorption medium is received from where it is driven through the regeneration stage that leads to the aforementioned first reservoir in which the regenerated first sorption medium is received. - the provision of a liquid first sorption medium, which upon contact with the gas mixture can at least partially sorb the gas to be extracted; - during a purification step, bringing this first sorption medium into contact with the gas mixture by guiding them together through a purification stage to have the gas to be extracted at least partially sorbed from the gas mixture by the first sorption medium due to the mutual contact, in order to be left with a purified gas mixture with less gas to be extracted and an enriched liquid first sorption medium in which the gas to be extracted from the gas mixture is at least partially sorbed; - the provision of a gaseous second sorption medium that can at least partially extract the gas to be extracted from the enriched liquid first sorption medium upon contact with this enriched liquid sorption medium; - during a regeneration step, bringing this gaseous second sorption medium into contact with the enriched liquid first sorption medium formed during the aforementioned purification step by guiding them together through a regeneration stage, whereby, due to the mutual contact, the sorbed gas to be extracted in the enriched first sorption medium is at least partially sorbed by the second sorption medium and whereby at the output of the regeneration stage an at least partially regenerated liquid first sorption medium is formed that can be reused for a subsequent purification step; - whereby use is made of a venturi ejector with a liquid input and a gas input for the regeneration step, whereby the enriched liquid first sorption medium originating from the purification step is supplied under pressure to the liquid input of this venturi ejector and the gaseous second sorption medium is drawn in via the gas input of this venturi ejector for the contact between the enriched first sorption medium and the second sorption medium and whereby use is made of a circuit in which the liquid first sorption medium is guided around from a first reservoir through the purification stage to a second reservoir in which the enriched first sorption medium is received from where it is driven through the regeneration stage that leads to the aforementioned first reservoir in which the regenerated first sorption medium is received.