The short-range molecular distillation apparatus is a special liquid-liquid separation technology. In the high vacuum state, the mean free path of the vapor molecules is greater than the distance between the evaporation surface and the condensation surface, so that each component in the material and liquid can be evaporated. The difference in velocity separates the liquid mixture. The preferred alternative to best short path distillation equipment: shorter residence times, lower processing temperatures, the ability to operate continuously without disrupting the vacuum system, and a plug-and-play turnkey turnkey design solution for the industry.
Short path distillation, "short path" means short distance. Broadly speaking, the evaporator adopts the design scheme that the distance from the evaporation surface to the condensation surface is less than 300MM, which can be called 2l short path distillation kit for sale equipment. From the point of view of design and structure, it can be divided into scraper type, centrifugal type and short-path distillation equipment which evolved from the improvement of the installation position of thin film evaporator condenser by some manufacturers in recent years.
Short Path Distillation Equipment
At present, the widely used and mature technology is the scraper type, which is composed of a vertical evaporation drum with external heating, a central condenser and a scraper type that rotates between the distiller and the condenser. The distillation process is as follows: the material enters the boiler from the top of the evaporator, and is continuously and evenly distributed on the heated surface of the boiler through the material liquid distributor on the rotor, and then the film scraper scrapes the material liquid into a very thin turbulent liquid film in a spiral shape. Push down. During this process, the light components escaping from the heating surface, over a 2l short path distillation kit for sale with little collision, will condense into a liquid on the built-in condenser, then flow down the condenser tubes and evaporate through the The discharge pipe at the bottom of the tank is discharged; the residual liquid, i.e. the heavy components, is collected in the annular channel below the heating zone, and then flows out through the side discharge pipe.
Molecular distillation is different from traditional distillation which relies on the principle of boiling point difference separation, but relies on the difference in mean free path of different substances. During distillation, when the liquid mixture flows along the heating plate and is heated under a certain pressure, light and heavy molecules will escape from the liquid surface and enter the gas phase. Due to the different free paths of light and heavy molecules, the moving distances of molecules of different substances are also different after escaping from the liquid surface. If a condensing plate is properly set (the distance between the condensing surfaces in the evaporation zone is generally less than 100MM), the light molecules will reach the condensing plate and be condensed and discharged, while the heavy molecules will not reach the condensing plate. This achieves the separation of substances.
The description of the distillation process should pay attention to "specific pressure conditions" and "distance between evaporation zone and condensation surface". That is to say, not all raw materials can achieve molecular distillation; the molecular distillation process can only be realized in scraped-surface best short path distillation stills or centrifugal short-path stills. It is either a simple distillation in a short distance still, or a molecular distillation, which must achieve molecular motion at a specific pressure and temperature to achieve the separation process.
Fine chemicals, such as aromatic oil purification, purification of polymer intermediates, extraction of lanolin, etc.
Pharmaceutical field: such as extraction of natural vitamin AE, etc. preparation of amino acid and glucose derivatives, etc.
Food industry: such as refined fish oil. Oil deacidification. Refined high carbon alcohol. Separation of mixed oil, etc.
Other fields: petroleum industry, daily chemical, environmental protection, etc.
1. Operate at a temperature far below the boiling point of the material, and the material residence time is 2l short path distillation kit for sale; it is conducive to the separation of high boiling point, heat sensitive and oxidizable materials
2. Effectively remove substances in the liquid such as organic solvents, odors, etc. It is a very effective method for the desolvation of the liquid after solvent extraction
3. The product can be evaporated and volatilized selectively, other impurities can be removed, and more than 2 kinds of substances can be separated at the same time through multi-stage separation
4. The distillation vacuum degree is high, the vacuum degree can reach below 0.1pa, and a high vacuum degree can be obtained inside the distillation, usually molecular distillation is performed under very low pressure
operation, so the material is not easily damaged by oxidation
5. The distillate film is thin, the heat transfer efficiency is high, and the film thickness is less than 0.5mm
6. Higher degree of separation, molecular distillation can separate conventional substances that are difficult to separate
7. There is no boiling bubbling phenomenon, molecular distillation is free evaporation on the surface of the liquid layer, carried out under low pressure, and there is no dissolved air in the liquid, so
During the distillation process, the whole liquid cannot be boiled, and there is no bubbling phenomenon.
8. Provide a variety of specifications for customers to choose, suitable for customer small-scale experiments, pilot-scale experiments, if larger evaporation area specifications are required, they can be customized according to customer requirements.
9. Physical separation method, non-toxic, harmless, pollution-free and residue-free, can obtain pure and safe products
9. The best short path distillation scraper system is made of PTFE material and SS316L stainless steel material, which has extremely high anti-corrosion effect;
10. The feeding tank can optionally realize the preheating function, and the preheating temperature can be adjusted.
11. Each interface is sealed with fluorine rubber gasket, which has good air tightness. If the customer needs corrosion resistance, it can be replaced with PTFE material
12. Various size options with different throughputs (60mm, 80mm, 100mm, 150mm, 200mm, 220mm, etc.), customized services can be provided according to demand.