Molecular Distillation Equipment

What is molecular distillation?

Molecular distillation is a special liquid-liquid separation technology, which is different from the traditional distillation which relies on the separation principle of boiling point difference. However, it depends on the difference of the mean free paths of the molecular motions of the different substances to achieve this separation. The reaction process of the molecular distillation machine means that in a device designed for high vacuum, the molecules can overflow from the hydrothermal liquid, and before colliding with other molecules, directly reach the built-in condensation surface and condense, thereby liquefying and achieving separation.

The principle of short path molecular CBD distillation systemes

As the liquid mixture flows along the heating plate and is heated, light and heavy molecules escape the liquid and become a gas. The free paths of light molecules and heavy molecules are different, and different molecules move at different distances after escaping from the liquid surface. A condensation plate is set up in molecular distillation. When light molecules reach the condensation plate, they are condensed and discharged, while heavy molecules cannot reach the condensation plate and The mixture is discharged together. In this way, the purpose of material separation can be achieved.

Model and composition of short path molecular distillation equipment

ZZKD manufacturer and provide distillation and extraction equipment. Molecular distillation equipment is one of the main distillation products of our company. At present, we have six models: YMD-060, YMD-80, YMD-100, YMD-150, YMD-200 , YMD-230.

A complete set of short path molecular distillation equipment mainly includes: molecular evaporator, degassing system, feeding system, heating system, cooling vacuum system and control system. There are also cylindrical barrels with heating jackets, rotors and built-in condensers; film scrapers and anti-splash devices are precisely installed on the rotor's fixed frame. The built-in condenser is located in the center of the evaporator, and the rotor rotates between the cylindrical barrel and the condenser. There are three main types of modern molecular distillation: (1) Falling film type: It is an early form and has a simple structure, but due to the thick liquid film and poor efficiency, it is rarely used in countries around the world today; (2) Wiped film type: The formed liquid film Thin, high separation efficiency, but more complex structure than falling film type; (3) Centrifugal type: centrifugal force film formation, thin film, high evaporation efficiency, but complex structure, difficult vacuum sealing, high equipment manufacturing cost. In order to improve the separation efficiency, it is often necessary to use multiple stages in series to achieve multi-stage separation of different substances.

We are currently focusing on wiped-film molecular distillation equipment. The feed liquid of the wiped-film molecular distillation machine flows through a heated cylindrical vacuum chamber, and uses the scraping effect of the feed liquid film to remove volatile components from non-volatile components. components are separated. The key advantages of this process are: short residence time of the feed liquid, perfect cooling according to the high vacuum capability, optimum mixing and efficiency of mass and heat transfer. The result of this efficient thermal separation technology: minimal product breakdown and highest product quality.

The operation of short path molecular distillation machine

1. The feed liquid enters the distiller under vacuum

2. Using the rotation of the scraper, it is quickly expanded into a thin film on the inner wall, and the downward movement is fully in contact with the evaporation surface

3. The heating wall and high vacuum drive the more volatile components to gather on the surface of the built-in condenser that is very close, while the less volatile components continue to move down the inner wall of the distillation column and are collected

4. The separated distillate flows out through a separate discharge port. Depending on the application, the desired product will be a distillate, or a residue. The compressible low molecular weight components were collected in a cold trap in the upper stream section equipped with a vacuum system.

Features of short path molecular distillation machinie

1. The distillation temperature is low. Molecular distillation is operated at a temperature far below the boiling point. As long as there is a temperature difference, the separation purpose can be achieved. This is the essential difference between molecular distillation and conventional distillation.

2. The distillation vacuum degree is high, and the molecular distillation device can obtain a high vacuum degree inside. Usually, molecular distillation is operated under very low pressure, so the material is not easy to be oxidized and damaged.

3. The distillation membrane is thinner and has a higher heat transfer efficiency.

4. The heating time of the material is short, and the distance between the heated liquid surface and the condensation surface is less than the mean free path of light molecules, so the light molecules escaping from the liquid surface reach the condensation surface almost without collision. Therefore, the heating time of the distillation material is short, and the residence time at the distillation temperature is generally between several seconds to several tens of seconds, which reduces the chance of thermal decomposition of the material.

5. The degree of separation is higher, and molecular distillation can separate conventional substances that are difficult to separate.

6. There is no boiling and bubbling phenomenon, molecular distillation is free evaporation on the surface of the liquid layer, carried out under low pressure, and because there is no air dissolved in the liquid, not all the liquid can be boiled during the distillation process, and bubbling does not occur.

7. Non-toxic, harmless, non-polluting, no residue, pure and safe products can be obtained, and the operation process is simple and the equipment is small. Molecular distillation technology can separate substances that are difficult to separate by conventional distillation.

8. Molecular distillation equipment is expensive. Molecular distillation equipment must ensure the high vacuum degree of the system pressure. It has high requirements for sealing materials and the distance between the evaporating surface and the condensing surface should be moderate. Equipment is difficult and expensive to install.

9. The energy consumption of the product is small. Due to the low loss of overheating in the whole separation of molecular distillation, and due to the unique structural form of the molecular distillation device, the internal pressure is extremely low, and the internal resistance is much smaller than that of conventional distillation, so energy consumption can be greatly saved.

10.If you use it for the extraction of CBD oil and plant essential oils, it is easier to handle and the extraction efficiency is higher.

Short path molecular CBD distillation machine application:

Molecular distillation machines are widely used. The following are the application fields and specific products of molecular distillation:

Oils and fats: deodorization of triglycerides, decolorization of oils and their derivatives, separation of esters from fatty acids and oils, separation of free fatty acids from vegetable and edible oils, tall oil fractionation, glycerol concentration , isolation of monoglycerides, diglycerides, glycerol, purification and deodorization of fish oil, removal of pesticides from natural oils, natural carotene concentration,Concentration of omega-3 fatty acids distilled from fish oil, fatty acid amine distillation, dimerized fatty acid distillation, oil deodorization, removal of pesticides from lanolin, carotene, vitamins, sterol isolation, cosmetic mixture isolation, coconut oil and other medium chain substances are distilled.Such as : cbd oil,essential oil.

Chemicals and specialty products: purification of polyphenylene substances, separation of aromatic amines from oxides and by-products, separation of long-chain acid chlorides from impurities and free acids, separation of solvents from silicone oils, concentration and purification of esters, herbicides and Insecticide concentration, sorbitan ester purification, paraffin wax and other natural paraffin purification, montan wax color improvement and solvent removal, pesticide deodorization and separation, lanolin decolorization, acrylic acid distillation, amide distillation.

Pharmaceuticals: purification of synthetic intermediates, evaporation of solvents obtained by chromatographic purification, distillation of extract components, fractionation of heat-sensitive substances, separation of intermediates obtained by fermentation.

Petrochemicals: separation of finely refined paraffins obtained from crude oil high vacuum distillation residues, fractionation of synthetic or petrochemical waxes into soft or hard waxes, removal of heavy hydrocarbons from asphalt, tar, residues.

Polymers: Liquefaction of prepolymers, biopolymers, purification and concentration of monomers, purification and concentration of polymers, plasticizers, UV inhibitors, stripping monomers from polymers, epoxy resins, latexes, isocyanates , silicone resin, acrylic acid purification, adhesive purification.

Nutrients, food, flavors and fragrances: terpene removal and oil concentration, separation of solvents in flavors and fragrances.

Fruit juice or extract concentrates, vitamin E, tocotrienoglycerides, antioxidant concentrates, derivatization of palm, rice bran, soybean, flax, sunflower and other oils, distillation of annatto oil derivates, concentration of lactic acid And isolation, pepper concentration, peppermint oil fractionation, for concentration, patchouli, sandalwood, vetiver, cedar oil purification, lycopene concentration, plant extract liquefaction, cholesterol, sterol isolation.

Recycled products: waste lubricating oil, brake fluid, glycerin refrigerant purification, heat transfer oil, frying oil, vacuum oil, transformer oil recovery,

Mother liquor recovery, polyethylene glycol recovery, treatment of mother liquor used in the production of pharmaceuticals, purification of organic intermediates, recovery of monochromatic acid obtained from mother liquor.

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