| 摘要 |
A process is described for preparing metal formate/formic acid mixtures comprising the following steps: a) Reacting at least one metal hydroxide with carbon monoxide or a carbon monoxide-containing gas in the presence of a catalyst in an aqueous solution to give the corresponding metal formate(s); b) separating off the water and catalyst by distillation; c) adding formic acid; d) if appropriate, adjusting to storage temperature the temperature of the metal formate/formic acid mixture obtained using steps a) to c); with, in step a), the metal hydroxides being the hydroxides of alkali metals and/or alkaline earth metals and step c) also being able to be carried out in time before step b). The catalyst is at least one catalyst selected from the group consisting of alcohol and formic esters. Preferred catalysts are unbranched C1-C4 alkanols, branched C3-C4 alkanols and their formic esters. Preferred metal hydroxides are the hydroxides of sodium, potassium and/or calcium. The concentration of the formic acid used in step c) is generally from 80 to 99.99% by weight in water, and the storage temperature in step d) is a temperature from 0 to 40° C.
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