Molecular Distillation Technology
Molecular distillation is a special kind of liquid-liquid separation technology operated in high vacuum (0.1~10Pa) and it’s also called short-path distillation.
It has the characteristics of low distillation temperature , high vacuum , short heating time for material , high degree of separation, etc. In addition, molecular distillation process is not reversible, and there is no bubbling and boiling phenomenon, therefore, it’s ideal for the separation of heat-sensitive, high boiling poit , oxidizable materials. And it’s also suitable for the deacidify and dewater of the material.
Application and equipment
At present, molecular distillation is widely used in the field of herbs extraction, petrochemical, food, cosmetics, agriculture, etc.
The equipment of molecular distillation includes feeding system, evaporator, fraction collection system, cooling system, vacuum system and controlling system.
Separation can be achieved because of the difference of the mean free
path of the different molecules. When the liquid mixture flows along the
heating plate and is heated,light and heavy liquid molecules escape into
the gas phase because of difference molecules after escaping from liquid
surface.If a condensation palte can be set up property,the light molecu-
les can reach condensation surface and condensate and be exhausted ,
the heavy molecules can not reach condensation surface and be exhau-
sted. In this way, the purpose of the separation material is achieved.