Our Short path distillation kit includes: 2L short path distillation, 5L short path distillation, 10L short path distillation, 20L short path distillation.

Short path distillation is also more suitable for molecular distillation,The molecular flow goes directly from the heating surface to the condenser surface.

The short path distillation process can be divided into the following four steps:

1.Molecules diffuse from the main body of the liquid phase to the evaporation surface:
 
Under normal circumstances, the diffusion rate in the liquid phase is the most important factor controlling the molecular distillation rate. The thickness of the liquid layer should be reduced as much as possible and the flow of the liquid layer should be strengthened.

2.Free evaporation of molecules on the surface of the liquid layer:

The evaporation rate increases with the increase of temperature, but the separation factor sometimes decreases with the increase of temperature. Therefore, the thermal stability of the processed material should be used as the premise to choose a more economical and reasonable distillation temperature.

3.The molecules fly from the evaporation surface to the condensation surface:

In the process of flying from the evaporation surface to the condensation surface, the vapor molecules may collide with each other, or they may collide with the air molecules remaining between the two surfaces. Since evaporation molecules are much heavier than air molecules, and most of them have the same direction of motion, their collisions have little effect on the direction of flight and the speed of evaporation. The residual gas molecules are in chaotic thermal motion between the two sides, so the number of residual gas molecules is the main factor that affects the direction of flight and the evaporation speed.

4.Molecules condense on the condensation surface:

As long as there is a sufficient temperature difference between the hot and cold sides (generally 70~100℃), and the form of the condensing surface is reasonable and smooth, it is considered that the condensation step can be completed in an instant, so it is very important to choose a reasonable condenser form.