Process for producing CO from CO 2 , comprising a) reacting CO 2 with water and an amine of the formula HNR 1 R 2 where R 1 and R 2 are the same or different and are selected from hydrogen and substituted and unsubstituted alkyl radicals having 1 to 20 carbon atoms to give a hydrogencarbonate of the formula HNR 1 R 2 H + HCO 3 - ; b) reacting the hydrogencarbonate of the formula HNR 1 R 2 H + HCO 3 - with hydrogen to give a formate of the formula HNR 1 R 2 H + HCO 2 - ; c) decomposing the formate of the formula HNR 1 R 2 H + HCO 2 - to give an amide of the formula HCONR 1 R 2 and H 2 O; d) decomposing the amide of the formula HCONR 1 R 2 to give CO and an amine of the formula HNR 1 R 2 , giving rise to a mixture comprising the amine of the formula HNR 1 R 2 and CO; and e) at least partly reacting the amine of the formula HNR 1 R 2 in the mixture comprising the amine of the formula HNR 1 R 2 and CO with a precipitation reagent, preferably with CO 2 , for production of a mixture comprising CO and a precipitation product of the reaction of the amine of the formula HNR 1 R 2 with the precipitation reagent, with or without unreacted amine of the formula HNR 1 R 2 , preferably a mixture comprising CO and a hydrogencarbonate of the formula HNR 1 R 2 H + HCO 3 - , with or without unreacted amine of the formula HNR 1 R 2 , and separating off the precipitation product of the reaction of the amine of the formula HNR 1 R 2 with the precipitation reagent, preferably of the hydrogencarbonate of the formula HNR 1 R 2 H + HCO 3 - , giving rise to a product comprising CO, with or without unreacted amine of the formula HNR 1 R 2 . a) reacting CO 2 with water and an amine of the formula HNR 1 R 2 where R 1 and R 2 are the same or different and are selected from hydrogen and substituted and unsubstituted alkyl radicals having 1 to 20 carbon atoms to give a hydrogencarbonate of the formula HNR 1 R 2 H + HCO 3 - ; b) reacting the hydrogencarbonate of the formula HNR 1 R 2 H + HCO 3 - with hydrogen to give a formate of the formula HNR 1 R 2 H + HCO 2 - ; c) decomposing the formate of the formula HNR 1 R 2 H + HCO 2 - to give an amide of the formula HCONR 1 R 2 and H 2 O; d) decomposing the amide of the formula HCONR 1 R 2 to give CO and an amine of the formula HNR 1 R 2 , giving rise to a mixture comprising the amine of the formula HNR 1 R 2 and CO; and e) at least partly reacting the amine of the formula HNR 1 R 2 in the mixture comprising the amine of the formula HNR 1 R 2 and CO with a precipitation reagent, preferably with CO 2 , for production of a mixture comprising CO and a precipitation product of the reaction of the amine of the formula HNR 1 R 2 with the precipitation reagent, with or without unreacted amine of the formula HNR 1 R 2 , preferably a mixture comprising CO and a hydrogencarbonate of the formula HNR 1 R 2 H + HCO 3 - , with or without unreacted amine of the formula HNR 1 R 2 , and separating off the precipitation product of the reaction of the amine of the formula HNR 1 R 2 with the precipitation reagent, preferably of the hydrogencarbonate of the formula HNR 1 R 2 H + HCO 3 - , giving rise to a product comprising CO, with or without unreacted amine of the formula HNR 1 R 2 . <EOS>