Машина за дестилацију кратког пута

is that the steam generated after the mixed liquid boils enters the fractionation column, where it is partially condensed, and the condensate contacts with the rising steam on the way down, and the two exchange heat, so that the high-boiling components in the steam are condensed, while the low-boiling components in the condensate still rise as steam, while the low-boiling components in the condensate are heated and gasified, and the high-boiling components still fall as liquid. This process is repeated repeatedly, which is equivalent to ordinary distillation for many times in a row. As a result, the low-boiling components in the rising steam increase, and the high-boiling components in the falling condensate increase. In this way, after many times of heat exchange, the separation of high boiling point components and low boiling point components is realized.

, it is necessary to check whether the inlet and outlet valves of the cooling fluid of each component are in the open state, to avoid scalding caused by excessive surface temperature of the external heating body of the equipment, to ensure that the ethanol in the low-temperature thermostatic bath is sufficient, to pay attention to whether the liquid nitrogen in the cold trap is sufficient, and to check whether the connection between the cold trap and the equipment is airtight.

In addition to short-path distillation, there are the following common separation technologies:

• Sublimation method: the phenomenon that a solid substance is directly transformed into a gas state without being in a liquid state, which can be used as a method for separation by using solid-gas equilibrium.
• Salting-out method: A small amount of salt (such as ammonium sulfate, sodium sulfate, ammonium chloride, etc.) can promote the dissolution of protein. When the salt solution added to protein reaches a certain concentration, the solubility of protein is reduced and precipitated from the solution.

1. Scraper: Used to evenly distribute and push the liquid mixture in the evaporation chamber. Scrapers are usually made of stainless steel or other corrosion-resistant materials, which have good corrosion resistance and wear resistance.

2. Separation column: To separate the liquid mixture into different components. The separation column is usually made of stainless steel or glass, and its internal surface is smooth to reduce the residence time and adhesion of the mixture in the separation column.

3. Baffle: It controls the flow speed and direction of liquid mixture to improve separation efficiency. The baffle is usually made of stainless steel or plastic and can be adjusted and replaced as needed.

• The scraper evenly distributes and pushes the liquid mixture to form a film-like flow state in the evaporation chamber.

1. The scraper type separation device can realize an efficient and accurate separation process with high separation efficiency.

2. Because the liquid mixture flows in a film-like state in the evaporation chamber, the heat transfer efficiency is high and the heat loss can be reduced.

3. The scraper type separation device can be adjusted and replaced as required, which is suitable for different separation processes.

Short-range molecular distillation is a technology to control the molecular spacing in liquid crystal materials by changing the solvent temperature, which is widely used in the design and preparation of functional liquid crystal materials. In the field of liquid crystal display, short distance molecular distillation can be used to adjust the arrangement of liquid crystal molecules, so as to achieve better display effect. In addition, short-range molecular distillation can also be applied to the following aspects:

• Biomedicine: After distillation, liquid crystal materials can be used in biomedical field, for example, for preparing liquid crystal materials with specific structure and biological affinity, and for the research of anti-tumor drugs and medical imaging.

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