Disadvantages of short path distillation

  Disadvantages of short path distillation

Short path distillation is a device used to make distillate of mixtures to extract several solvents at the same time. It is widely used in chemical,biochemical and industrial fields. Extracting solvents by short path distillation is very efficient but there are still some disadvantages in short path distillation, for example: as we all know, in the running of short path distillation, mixtures can be evaporated and then solvents get extracted. It takes a short distance for the extracted gas solvents to go from the evaporation flask into condenser. So in this process, the extracted gas solvents can get lost easily and be left in the short distance.

  Short path distillation problems

When we use short path distillation, there are always some problems need to pay attention to, they are as follows:

1. It is essential to keep a good sealed environment, which is protective for the whole process. Because a good sealed environment can guarantee the purity of extracted solvents.

2. There is always few extracted gas solvents left in the glass reactor. Because there is a short distance from the evaporation flask to the receiving flasks. So along the distance, there is always gas solvents left.

  Rotary evaporator vs short path distillation

The similarity between rotary evaporator and short path distillation is, that both of them are devices to extract solvents from mixtures through evaporation. In the equipment of rotary evaporator and short path distillation, there are both one evaporation flask to get solvents evaporated and receiving flasks to receive extracted solvents.

The differences between rotary evaporator and short path distillation are:

1. Rotary evaporator is more efficient than short path distillation to remove solvents from mixtures. Because rotary evaporator runs in vacuum environment, which is very protective for the purity of extracted solvents. However, short path distillation can loss few extracted gas solvents along the short distance from evaporation flask to receiving flask.

2. Rotary evaporator and short path distillation have different structures and parts. For rotary evaporator, there is one receiving flask in the whole equipment and one evaporation flask. And for short path distillation, there are two or three receiving flasks in the whole equipment and one evaporation flask.

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