Effect of vacuum environment on short path molecular distillation

    Short path molecular distillation is a high-vacuum distillation process in which the feedstock is heated in a short path molecular distillation apparatus, scraped into a film, and the light components are vaporized under high vacuum and condensed on a built-in condenser. The separated light and heavy components are continuously discharged under high vacuum conditions, so how to collect qualified samples or products under high vacuum is critical.
  Short path molecular distillation is the same as other distillation processes. At the beginning of the experiment, the parameters of the system need to be adjusted (such as temperature, pressure, feed amount, etc.), and the evaporation and condensation of the system have not yet reached equilibrium. The light, heavy component samples do not accurately represent the parameters of temperature, pressure, and feed volume. Generally, we need to collect light and heavy component samples 3 to 5 minutes after these parameters are stabilized. After the end of the experiment, we need to cool down the equipment, release the vacuum, reduce the amount of feed and other operations. At this time, the collected samples need to be switched off in time to be discarded.
   How to obtain a clear fraction is related to the success or failure of the distillation experiment, which is very important for the molecular distillation experiment under high vacuum conditions. Therefore, under the condition of not releasing the vacuum, what kind of sample collection or discharge method is selected becomes the concern of the experimenter.