Short path distillation/Molecular distillation is a special liquid-liquid separation technology, which is different from traditional distillation on the different boiling point. This is a kind of distillation in high vacuum environment, for the difference of material molecular movement free path, was carried out in the heat sensitive material or high boiling point material distillation and purification process. Short path distillation is mainly used in chemical, pharmaceutical, petrochemical, spices, plastics, oil and other fields