| 摘要 |
A method of azeotropic distillation comprising distilling a solution to be distilled in an azeotropic distillation column using an entrainer, recovering an azeotropic component containing the entrainer as an overhead product, and recovering a solution having a reduced content of the azeotropic component as a bottom product, characterized in that it further comprises setting in advance a target value of the residence amount of the entrainer so as for an azeotropic region in the distillation column to be in a predetermined range in the column, finding a real residence amount of the entrainer, and controlling the operation conditions for the distillation column so that the real residence amount agrees with the target value. |
