YUAN-FD-Q
YUAN
Distillation technology that rapidly condenses and takes out vaporized molecules in the process of realizing separation by utilizing the difference in the degree of freedom of molecular movement between the components of the mixture under vacuum conditions.
Under high vacuum, the chances of gas molecules colliding during motion are reduced. In the process of molecular motion, the distance traveled by molecules before they collide with each other becomes the free path of molecular motion, and the motion without collision between molecules is called free molecular motion. At this time, the motion of molecules is no longer subject to mutual motion under high pressure. Friction-induced viscosity control. Under high vacuum conditions, if the size of the container or the distance from the liquid surface to the condensation wall is less than the average degree of freedom of the molecules, the molecules may be condensed and collected from the liquid surface to the condensation wall through free molecular motion. The degree of freedom of molecules is not only related to temperature and vacuum degree, but also to the molecular weight and vapor pressure of the substance. Therefore, if the distance between the liquid surface and the condensation wall surface is properly designed, the molecules with larger molecular degrees of freedom can be selectively separated.
According to the theory of gas molecular motion, the number of moles of molecules colliding with the unit condensation wall in unit time is proportional to its saturated vapor pressure and inversely proportional to the square root of molecular weight. Therefore, the composition of each component of the liquid product on the condensation surface can be obtained according to the saturated vapor pressure, molecular weight and concentration of each component in the feed liquid. Because molecular distillation is carried out under high vacuum conditions, the evaporation temperature is much lower than the normal boiling point of the material, so it is very suitable for the separation and purification of substances with high boiling point and poor thermal stability.
Molecular distillation systems can be used in the production of L-lactic acid and other organic acids.
Distillation technology that rapidly condenses and takes out vaporized molecules in the process of realizing separation by utilizing the difference in the degree of freedom of molecular movement between the components of the mixture under vacuum conditions.
Under high vacuum, the chances of gas molecules colliding during motion are reduced. In the process of molecular motion, the distance traveled by molecules before they collide with each other becomes the free path of molecular motion, and the motion without collision between molecules is called free molecular motion. At this time, the motion of molecules is no longer subject to mutual motion under high pressure. Friction-induced viscosity control. Under high vacuum conditions, if the size of the container or the distance from the liquid surface to the condensation wall is less than the average degree of freedom of the molecules, the molecules may be condensed and collected from the liquid surface to the condensation wall through free molecular motion. The degree of freedom of molecules is not only related to temperature and vacuum degree, but also to the molecular weight and vapor pressure of the substance. Therefore, if the distance between the liquid surface and the condensation wall surface is properly designed, the molecules with larger molecular degrees of freedom can be selectively separated.
According to the theory of gas molecular motion, the number of moles of molecules colliding with the unit condensation wall in unit time is proportional to its saturated vapor pressure and inversely proportional to the square root of molecular weight. Therefore, the composition of each component of the liquid product on the condensation surface can be obtained according to the saturated vapor pressure, molecular weight and concentration of each component in the feed liquid. Because molecular distillation is carried out under high vacuum conditions, the evaporation temperature is much lower than the normal boiling point of the material, so it is very suitable for the separation and purification of substances with high boiling point and poor thermal stability.
Molecular distillation systems can be used in the production of L-lactic acid and other organic acids.
