| abstract |
A polar comprising a catalyst containing elements of groups 8, 9 or 10 of the periodic table, tertiary amines containing at least 12 carbon atoms per molecule, and at least one monoalcohol selected from methanol, ethanol, propanol and butanol, and water In the presence of a solvent, formic acid is prepared by reacting carbon dioxide (1) with hydrogen (2) in a hydrogenation reactor (I) to form a formic acid / amine adduct as an intermediate that is subsequently thermally decomposed, wherein the hydrogenation reactor (I A process for producing formic acid is proposed, wherein the workup of the output (3) from e) is carried out in several process steps, and the stream (13) comprising tertiary amine from the workup is used as an optional solvent for the catalyst. do. |