Description:
"Distillation equipment" is a separation technology carried out under high vacuum conditions. It has the characteristics of low distillation temperature, high system vacuum, short heating time of materials, and high degree of separation; and the separation process is irreversible, without boiling bubbling. It is particularly suitable for separating substances with high boiling point, heat sensitivity and easily oxidized. It has been widely used in the extraction of vitamins and Chinese herbal medicine active ingredients in the pharmaceutical industry, petrochemical industry, food industry, cosmetics industry and agriculture.
Features:
1. Ordinary distillation is a separation operation at the boiling point temperature: molecular distillation can be separated at any temperature as long as there is a sufficient temperature difference between the cold and hot surfaces. Therefore, the molecular distillation operation temperature is much lower than the boiling point of the material.
2. Ordinary distillation has bubbling and boiling phenomenon: while molecular distillation is free evaporation on the surface of the liquid film. The operating pressure is very low. Generally, it is on the order of 0.1 to 1 Pa, and the heating time is very short. Generally only ten seconds to tens of seconds.
3. The evaporation and condensation of ordinary distillation are reversible processes. The liquid phase and the gas phase are in a dynamic phase equilibrium, while in the molecular distillation process, the molecules that escape from the heating surface directly fly to the condensation surface. Theoretically, they do not return to the heating surface. Therefore, molecular distillation has no substances that are difficult to separate.
Applications:
It is used in the extraction of vitamins and Chinese herbal medicines in the pharmaceutical industry, petrochemical industry, food industry, cosmetics industry, agriculture and other industries.
