Method for producing formic acid by reaction of carbon dioxide and hydrogen

Carbon dioxide (1) and hydrogen (2) and the hydrogenation reactor (I) in the eighth group of the periodic table, and a catalyst comprising a Group 9 or Group 10 element, at least 12 per molecule and tertiary amines containing carbon atoms, methanol, ethanol, are reacted in the presence of a polar solvent comprising one or more monoalcohols selected from propanol and butanol, an intermediate product adducts formic acid / amine by forming a, it continues to a method for producing formic acid by thermally decomposing, in which effluent from the hydrogenation reactor (I) a post-processing (3) was performed with the addition of water and in this case, the method of distribution coefficient of the catalyst between the upper phase (4) and the lower phase is increased is proposed.