A process for separating cyclohexanol and other impurities from a mixture containing cyclohexanone and cyclohexanol is disclosed. In this process a mixture of cyclohexanone and cyclohexanol are introduced into a first distillation column from which low-boiling components are distilled; the bottoms of the first distillation column are then fed to a second distillation column from which cyclohexanone is distilled; the bottoms of the second distillation column are fed to a third distillation column from which cyclohexanol and other impurities are removed; and the distillate of the third distillation column is then circulated into the first distillation column via a dehydrogenation zone; wherein the pressures at the tops of the first, second, and third distillation columns are maintained at 20 to 400 Torr; part of the bottoms of the second distillation column is supplied to a fourth distillation column having a pressure at the top of 500 to 2,500 Torr, and from which low-boiling components are removed; the distillate of the fourth distillation column is circulated into either the first distillation column, the second distillation column, the third distillation column or the dehydrogenation zone; and the bottoms of the third and fourth distillation columns are not circulated.