| 摘要 |
PURPOSE:To efficiently prepare the subject compound while depressing the hydrogenolysis of hydroxyl groups by hydrogenating the nucleus of pyrogallol in the presence of a rhodium-carrying alumina catalyst under specific pressure and temperature conditions in a liquid phase an the nuclear hydrogenation of the pyrogallol. CONSTITUTION:Pyrogallol is hydrogenated in the presence of a rhoclium- carrying alumina catalyst under a hydrogen pressure of 1-110 atmospheres, preferably 5-100 atmospheres, at 30-150 deg.C, preferably 40-120 deg.C, in a liquid phase to efficiently and profitably provide 1,2,3-cyclohexanetriol in a high purity. The carrying amount of the rhodium metal on the alumina is usually 0.001-30wt.%, preferably 0.01-10wt.%, based on the carrier, and the catalyst is used in a concentration of usually 0.001-20wt.%, preferably 0.1-10wt.%, in the liquid phase. The concentration of the pyrogallol in a solvent is usually 1-50wt.%, preferably 5-30wt.%. |
