Short path distillation/molecular distillation is a special liquid-liquid separation technology, which differs from traditional distillation in boiling point. This is a distillation carried out in a high vacuum environment, and is carried out in the distillation and purification process of heat-sensitive substances or high-boiling substances according to the different free paths of molecular motion of substances. Short-path distillation is mainly used in chemical, pharmaceutical, petrochemical, fragrance, plastic, petroleum and other fields.
Extraction principle: Extraction is to use the different solubility of each component in the raw material liquid in the two liquid phases to separate the raw material liquid mixture.
The glass continuous distillation experimental device is mainly used for the research and development and simulation of small and pilot tests in the laboratory. tank, tower top receiving tank, tower bottom receiving tank, feed pump, reflux pump, production pump, PTFE valves and pipelines and other important parts. This system is capable of normal pressure or reduced pressure operation. The sealing requirements of the whole set of equipment are relatively high. During the experimental operation, the pressure fluctuation will affect the stability of the entire experiment. Therefore, the glass connection parts of the system are all connected by ball flanges and sealed with PTFE gaskets.
The operating characteristics of extractive distillation: In order to increase the relative volatility of the separated components, the liquid phase of each plate should maintain sufficient additive concentration. When the raw material and extraction solvent are added to the column in a certain proportion, there must be a certain maximum Appropriate reflux ratio. When the reflux without additives is too large, instead of improving the composition of the distillate, it will reduce the concentration of additives in the column and make separation more difficult. Similarly, when the reflux temperature at the top of the tower is too low or the temperature at which the additive is added is low, it will cause partial condensation of the steam in the tower and dilute the concentration of the additive in each plate.
Due to the rapid development of the domestic electronic consumer market, various types of electronic industries have a huge demand for chips. Therefore, the domestic semiconductor industry has developed rapidly in the past two years. Electronic materials, electronic grade solvents, electronic special gases and other electronic chemicals are very important for the chip manufacturing process. Therefore, many large domestic chemical companies have carried out a lot of research and development and investment in this field.
AISHENGKE designs and fabricates basic to complex systems using the Wiped-Film Distillation process (also called Thin-Film Distillation, Short Path Distillation, and Short Path Evaporation) for stills, evaporators and hybrid configurations that include fractional columns with wiped-film distillation units, centrifugal molecular distillation units, vacuum distillation, condensers, evaporation and processing vessels that meet our customer’s application requirements, with superior results.
With the competition in the market, the requirements of all parties for product quality are constantly improving. The use of precision rectification methods to improve product quality is the most economical and important means that cannot be replaced by other purification methods.
AISHENGKE company adopts the Wiped-Film Style, which is very different from the traditional Roller Style, mainly in the scraper system. We use the Smith diagonal chute scraper, which is much more efficient than the roller, Provide first-class laboratory materials, technologies and services to make your research possible.
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In the process of rectification experiments, R&D personnel often encounter some products with high melting point and poor fluidity, and some products are in a solid state at room temperature.
Molecular distillation is a special liquid-liquid separation equipment. Unlike traditional distillation, it relies on the boiling point difference separation principle, but on the difference of the average free path of different substances. When the liquid mixture flows along the inner wall of the main evaporator and is heated, light and heavy molecules will escape from the liquid level and enter the gas phase. Due to the different free paths of light and heavy molecules, the molecules of different substances move different distances after escaping from the liquid level. After passing through the built-in condensate pipe of the main evaporator, the light molecules reach the condensate pipe and are discharged, while the heavy molecules cannot reach the condensate pipe and are discharged along the mixed liquid, So as to achieve the purpose of material separation.
The distillation temperature is low, and molecular distillation is operated at temperatures far below the boiling point. As long as there is a temperature difference, separation can be achieved. This is the essential difference between molecular distillation and conventional distillation.
Short-path distillation (molecular distillation) is a new separation technology that can solve a lot of problems that cannot be solved by conventional distillation technology. Short-path distillation (molecular distillation) is a special liquid-liquid separation technology that can operate under extremely high vacuum.
1. High evaporation efficiency can reduce the retention time, with minimal time delay. 2. Short path distillation is made of 3.3 high borosilicate glass and PTFE, which has excellent corrosion resistance. 3. Main body of Short path distillation is made of 3.3 high borosilicate glass , allowing the whole process to be observed very clearly.