Turn Key Short Path Distillation Kit

What is turn key short path distillation kit?

Turn key short path distillation kit (short path distillation) is a continuous distillation process for separation operation under high vacuum. Under high vacuum conditions, since the distance between the heating surface and the condensation surface of the short-path distiller is less than or equal to the mean free path of the separated material molecules, when the molecules evaporate on the surface of the liquid film formed on the heating surface of the short-path distiller, the intermolecular They do not collide with each other, move to the condensation surface without hindrance and are condensed on the condensation surface, so short-path distillation is also called molecular distillation. Since the short-path distillation is carried out in a high vacuum at a temperature far below the boiling point, and the distillation time is very short, this process has become the mildest distillation method for separating the target product, especially suitable for concentration, purification or separation of high molecular weight, high boiling point, High viscosity substances and organic mixtures with poor thermal stability. At present, short-path distillation has been successfully applied in many industries such as food, medicine, fine chemical industry and cosmetics.

Turn key short path distillation kitprocess:

(1) The liquid film formation of the material on the heating surface: a film with fast movement and uniform thickness is produced on the heating surface of the distiller by mechanical means.

(2) Free evaporation of molecules on the surface of the liquid film: molecules evaporate in a high vacuum at a temperature far below the boiling point.

(3) The movement of molecules from the heating surface to the condensation surface: as long as the short-path distiller ensures a sufficiently high vacuum so that the mean free path of the evaporated molecules is greater than or equal to the distance between the heating surface and the condensation surface, the movement of the molecules to the condensation surface And the evaporation process can proceed quickly.

(4) Capture of molecules on the condensation surface: as long as a sufficient temperature difference is reached between the heating surface and the condensation surface, the shape of the condensation surface is reasonable and smooth, and the light components will condense on the condensation surface. It's done in an instant.

(5) Collection of distillate and residue: Due to gravity, the distillate is collected at the bottom of the condenser. The heavy components that have not evaporated and the very little light component residues that return to the heating surface slide down to the bottom of the heater or the outer edge of the turntable due to gravity or centrifugal force.

Features of turn key short path distillation kit

Compared with ordinary distillation, turn key short path distillation kit has the following characteristics.

(1) Ordinary distillation is a separation at the boiling point; while short-path distillation can be separated at any temperature as long as there is a sufficient temperature difference between the hot and cold sides.

(2) The evaporation and condensation of ordinary distillation are reversible processes, and a dynamic phase equilibrium is reached between the liquid phase and the gas phase; while in the process of turn key short path distillation kit, the molecules escaping from the heating surface are directly shot to the condensation surface, There is theoretically no possibility of returning to the heating surface, so short-path distillation is an irreversible process.

(3) Ordinary distillation has bubbling and boiling phenomena; while short-path distillation is free evaporation on the surface of the liquid film without bubbling, or short-path distillation is a distillation process without boiling.

(4) The separation ability of ordinary distillation is only related to the ratio of vapor pressure of components; while the separation ability of turn key short path distillation kit is related to the ratio of vapor pressure and relative molecular mass of components. The greater the difference in relative molecular mass, the greater the distillate The purer the substance, the short-path distillation can also separate mixtures with very similar vapor pressures but different relative molecular masses.

Turn key short path distillation kit application:

After more than 60 years of processing and exploring thousands of substances,
Turn key short path distillation kit has been widely used, and its industrial applications include food, cosmetics, pharmaceuticals, aerospace, plastics, petrochemical, wax, paper and chemical industries and other fields.

(1) Food processing industry: refining edible oil, separating vitamins, sterols, fatty acids and antioxidants and other high-value products.

(2) Cosmetics industry: extract lanolin, spices and other products.

(3) Pharmaceutical industry: natural vitamin A and vitamin E and natural medicines including sedatives, etc.

(4) Coatings and paint industry: improve the drying performance and hardness of polymerized oils such as sesame oil and linseed oil.

(5) Epoxy resin production: make the epoxy resin lighter in color, lower in viscosity, and extend its storage life.

(6) Silicon production industry: It is easy to remove low molecular weight or high molecular weight polymers from polymer mixtures。

(7) Wax production industry: purification of natural paraffin wax, beeswax, palm wax, certain microcrystalline wax and high melting point wax.

(8) Mineral oil production: used for high-temperature lubricating oil and grease, generally extracted from petroleum residue C/35 ~C/100 fraction.
 

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