Method and device for producing carbon monoxide from carbon dioxide

A process for producing CO from CO2, comprising:

• a) reacting CO2 with water and an amine of the formula HNR1R2 where R1 and R2 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 HNR1R2H+ HCO3−;
• b) reacting the hydrogencarbonate of the formula HNR1R2H+ HCO3− with hydrogen to give a formate of the formula HNR1R2H+ HCO2−;
• c) decomposing the formate of the formula HNR1R2H+ HCO2− to give an amide of the formula HCONR1R2 and H2O;
• d) decomposing the amide of the formula HCONR1R2 to give CO and an amine of the formula HNR1R2, giving rise to a mixture comprising the need of the formula HNR1R2 and CO;
• and
• e) at least partly reacting the amine of the formula HNR1R2 in the mixture comprising the amine of the formula HNR1R2 and CO with a precipitation reagent for production of a mixture comprising CO and a precipitation product of the reaction of the amine of the formula HNR1R2 with the precipitation reagent, with or without unreacted amine of the formula HNR1R2, and separating off the precipitation product of the reaction of the amine of the formula HNR1R2 with the precipitation reagent, giving rise to a product comprising CO, with or without unreacted amine of the formula HNR1R2.