| abstract |
The invention relates to method for the continuous separation of mixtures comprising morpholine (MO), monoaminodiglycol (ADG), ammonia, and water by means of distillation, obtained by the reaction of diethylene glycol (DEG) with ammonia, wherein in a first distillation column K10 ammonia is separated at the head, the yield of K10 is fed to a second distillation column K20, in which water and organic products are separated at the head at a head temperature ranging between 45 and 198°C, and a pressure ranging between 0.1 and 15 bars, the yield of K20 is fed to a third distillation column K30, in which MO and organic products having a boiling point of < 140°C (1.013 bars) are separated at the head or by side draw, and ADG and organic products having a boiling point of > 190°C (1.013 bars) are separated at the bottom, the flow comprising the MO, which is separated in column K30 at the head or by side draw, is fed to a fourth column K40, in which organic products having a boiling point of < 128 °C (1,013 bar) are separated at the head, and MO and organic products having a boiling point of > 128°C (1.013 bars) are separated at the bottom, and the yield of K40 is fed to a fifth distillation column K55, in which MO is separated at the head, and organic products having a boiling point of > 128 °C (1.013 bars) are separated at the bottom. |