These three are the outstanding features of molecular distillation

Molecular distillation is mainly suitable for distillation with high molecular weight, temperature resistance and high boiling point in the process of use. In the process of production, it is mainly a vertical cylinder heated from outside, which is condensed in its center during operation. It consists of a film wiper rotating between the distiller and the condenser. The material is added from the top of the evaporator, and it is continuously and evenly distributed on the heating surface by the material liquid distributor on the rotor. Then the film scraper scrapes the material liquid into a very thin, turbulent liquid film, and spirals it. Advance downwards. To a certain extent, light molecules that escape from the heating surface will condense into liquid on the built-in condenser through a short route and almost no collision during production, and flow down the condenser tube, passing through the evaporator. The discharge pipe at the bottom is discharged; the residual liquid, the heavy molecules, is collected in the circular channel under the heating zone, and then flows out through the discharge pipe on the side.
Compared with conventional distillation, molecular distillation has the following incomparable characteristics:
(1) The operating temperature is low, which can greatly save energy consumption. Conventional distillation relies on the boiling point difference of different substances in the material mixture for separation, while molecular distillation relies on the difference in the mean free path of molecular motion of different substances. It is required that the material must reach a boiling state, as long as the molecules volatilize and escape from the liquid phase, separation can be achieved. Because molecular distillation is operated far from the boiling point, the energy consumption of the product is small.
(2) Distillation pressure is low, requiring operation under high vacuum. The mean free path of molecular motion is inversely proportional to the system pressure. Only by increasing the degree of vacuum can a sufficiently large mean free path be obtained. Studies have pointed out that the vacuum degree of molecular distillation is as high as 0.1-100Pa.
(3) The heating time is short, reducing the thermal damage of heat-sensitive substances. Because molecular distillation uses the difference in the mean free path of the molecules of different substances to achieve separation, the basic requirement is that the distance between the heating surface and the condensing surface must be less than the mean free path of light molecules. This distance is usually very small. After the liquid surface escapes, it almost hits the condensation surface without collision, so the heating time is extremely short.