Short path distillation and molecular distillation
Short path distillation and molecular distillation are quite similar. Short path distillation is a separation method that works through a short distance under reduced pressure. Molecular distillation is a more complicated separation method than simple and traditional separation methods. There are still some differences between them.
The difference between short path distillation and molecular distillation
1. Different applications. Molecular distillation is used in the separation of the light molecules within the heat sensitive substances, the removal of heavy materials and colors, and so on. Short path distillation is used in the production of lactic acid, paraffin wax, monoglycerides, omega‐3 fatty acids, and monomers.
2. Different structures and scales. Compared with molecular distillation, short path distillation has a simpler structure and a smaller scale. Molecular distillation has a more complicated structure with scrapers.
3. Different working process. In the molecular distillation equipment, materials need to be added from the top and then be heated with scrapers dividing materials into a film evenly. Then the evaporated materials will be divided into heavy molecules and light molecules, which will go to different ways to be collected. In the short path distillation equipment, the materials will be heated and evaporated, then the gas-phase product will be condensed into liquid-phase and transferred into the receiving flask for users to get easily. Compared with molecular distillation, short path distillation has a simpler working process.