Rotary evaporators are mainly used for concentration, crystallization, drying, separation and coal recovery in the pharmaceutical, chemical and biopharmaceutical industries. The principle is as follows: under vacuum condition, the constant temperature is heated to make the rotating bottle rotate at a constant speed, and the material forms a large-area film on the bottle wall and evaporates efficiently. The dissolved coal vapor is cooled by a high-efficiency glass condenser and recovered in a collecting bottle, thereby greatly improving the evaporation efficiency, and is particularly selected for the concentration and purification of biological products which are easily decomposed and degenerated by high temperature. The core technology of the rotary evaporator is the airtightness of the system, that is, whether the system can maintain a high vacuum under the action of various solvents.
1. What are the factors that affect the efficiency of the rotary evaporator?
For the same specification machine, there are mainly: steam temperature, vacuum and cooling water temperature. Due to the heat resistance of some materials, it is impossible to increase the steam temperature indefinitely during work. Therefore, high vacuum and low cooling water temperature are the two main factors for improving efficiency (optional cryopumps can be used to reduce water temperature).
2. What is the difference between a vertical condenser and a diagonal condenser?
There is no obvious difference in essence. Vertical condensers are gaining popularity due to their small footprint. Large-capacity evaporators generally use a vertical condenser.
3. What is the basis for the design of the main engine lifting and water bath lifting?
Based on the principle of convenience, safety and economy, the international small machine (5L or less) lifting main machine, 5L or more lifting water bath.
4. How to choose the model of the rotary evaporator?
Rotary evaporators have good corrosion resistance and sealing. 2L, 3L, 5L machines are suitable for Laboratory and sample tests; 5L, 10L, 20L are suitable for pilot test; 20L, 50L are suitable for pilot test and production, especially for the extraction of metal ion contaminants.
5. What are the advantages of the rotary evaporator?
The rotary evaporator has the advantages of compact structure, compact and efficient operation, intuitive operation and no metal ion pollution. It is suitable for laboratory, production pilot and the extraction of valuable materials. Its sealing performance is comparable to that of foreign machines.
6. What type of vacuum pump is used for the rotary evaporator?
A water circulation pump is recommended, which has the advantage of being resistant to various solvent corrosion and can be evacuated to -0.095 MPa (to meet the requirements of use). The vacuum pump can be selected according to the size of the evaporator, and can be supplied with various types of vacuum.
1. What are the factors that affect the efficiency of the rotary evaporator?
For the same specification machine, there are mainly: steam temperature, vacuum and cooling water temperature. Due to the heat resistance of some materials, it is impossible to increase the steam temperature indefinitely during work. Therefore, high vacuum and low cooling water temperature are the two main factors for improving efficiency (optional cryopumps can be used to reduce water temperature).
2. What is the difference between a vertical condenser and a diagonal condenser?
There is no obvious difference in essence. Vertical condensers are gaining popularity due to their small footprint. Large-capacity evaporators generally use a vertical condenser.
3. What is the basis for the design of the main engine lifting and water bath lifting?
Based on the principle of convenience, safety and economy, the international small machine (5L or less) lifting main machine, 5L or more lifting water bath.
4. How to choose the model of the rotary evaporator?
Rotary evaporators have good corrosion resistance and sealing. 2L, 3L, 5L machines are suitable for Laboratory and sample tests; 5L, 10L, 20L are suitable for pilot test; 20L, 50L are suitable for pilot test and production, especially for the extraction of metal ion contaminants.
5. What are the advantages of the rotary evaporator?
The rotary evaporator has the advantages of compact structure, compact and efficient operation, intuitive operation and no metal ion pollution. It is suitable for laboratory, production pilot and the extraction of valuable materials. Its sealing performance is comparable to that of foreign machines.
6. What type of vacuum pump is used for the rotary evaporator?
A water circulation pump is recommended, which has the advantage of being resistant to various solvent corrosion and can be evacuated to -0.095 MPa (to meet the requirements of use). The vacuum pump can be selected according to the size of the evaporator, and can be supplied with various types of vacuum.
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