The short path distillation is a technique that removes solvents form mixtures through evaporation, which is mainly used for liquid-liquid separation. The principle is that the pressure difference between the boiling film and condensing surface is the driving force of the steam flow, and the minimum pressure will cause the flowing of steam. Under the 1mbar, the operation requires that there is the shortest distance between the boiling surface and condensing surface. The evaporator manufactured based on the principle is called the short-path distillation.
The column cylinder is equipped with an external heating mantle, a rotor and an internal condenser. The fixing frame of rotor is precisely equipped with the scratch film and anti-splash device. The internal condenser is placed in the center of the evaporator, and the rotor is between the column cylinder and the condenser.
The material should be added from the top of the evaporator and continuously spread to the heating surface through the material covered on the rotor. Then, the scratch film is capable of scratching the material into a thin and flowing liquid film. During this process, the light molecular exceeded the heating surface form the condense liquid on inside condenser without any collision. Then, the molecular flows along the condenser tube, and discharges through the discharge tube on the bottom of the evaporator. The residue liquid (heavy molecule) is collected on the circular channel under the heating zone, and flows through the discharge tube on one side.
Parts of Short Path Distillation
The continuous discharging can be realized without pressure relief during the experiment.
The vertical spine structure can be used for fractionation function. The vacuum sandwich is used to weaken the influence of wind and greenhouse to maintain the appropriate temperature gradient in the column.
Glass parts are connected by the frosted mouth, possessing easy operation and good sealing performance.
The double-mouth reaction flask is adopted, with a special feeding port, which is convenient for feeding.
|Heating temperature（℃）||Room temperature -250|
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