Laboratory short path distillation is a thermal separation process of heat-sensitive products under vacuum conditions. By increasing the vacuum to eliminate the atmospheric pressure in the system, when the pressure drops, the boiling point of the contained compounds will drop. This process makes the extraction of heavier molecules faster and more efficient. The short residence time and low evaporation temperature will cause minimal thermal stress on the distillation product. It is designed based on the principle of molecular distillation. Typical applications are polymer organic compounds, especially from the chemical pharmacy and food industries. Distillation is one of the most important thermal separation methods.