| 摘要 |
PURPOSE:To obtain selectively a lower aliphatic carboxylic acid and a derivative thereof, by using a hafnium compound as a catalyst in reacting carbon monoxide with hydrogen in the liquid phase in the presence of the catalyst and an organic solvent under heating and pressurizing. CONSTITUTION:Carbon monoxide is reacted with hydrogen in the liquid phase in the presence of a hafnium compound, preferably a hafnium compound soluble in the reaction system, particularly a hafnium halide, as a catalyst and an organic solvent, preferably an aprotic dipolar solvent, e.g. an ester, polyether, sulfone or amide, etc. preferably under pressurizing and heating under 1,000- 50kg/cm<2>.G at 150-300 deg.C to give the aimed lower aliphatic carboxylic acid and a derivative thereof containing acetic acid as a main component and a small amount of propionic acid, etc. |
