What Is The Difference Between Single-layer Glass Reactor And Jacket Glass Reactor?
Nov 15, 2023
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There are significant differences in material, structure, function, and other aspects between single-layer glass reactors and jacket glass reactors. A single-layer glass reactor can only perform stirring reactions under normal or negative pressure, while a jacket glass reactor can perform more functions, including heating or cooling reactions.
1. Material:
The body of a single-layer glass reactor is made of single-layer glass. This type of glass reaction kettle is usually used for stirring reactions under normal or negative pressure, and reaction materials can be added to the kettle for various chemical reactions. The reactor body of a laminated glass reactor is a double-layer structure, consisting of two layers of glass inside and outside. The intermediate layer can be heated or cooled by various cooling media. This type of reactor is suitable for high and low temperature reaction conditions, with a temperature range of approximately -80 ℃~250 ℃.
2. Structure:
The structure of a single-layer glass reaction kettle is relatively simple, generally spherical or barrel shaped, and the heating methods include water bath heating, oil bath heating, electric jacket heating, flexible electric jacket heating, etc. Due to its structural limitations, this reactor cannot undergo heating or cooling reactions. The structure of the laminated glass reaction kettle is more complex, and the interlayer can be controlled by an external temperature controlled circulation device to regulate the temperature of the materials inside the kettle by introducing circulating liquid. At the same time, different refrigerants, heating agents, or high and low temperature oils can also be introduced into the interlayer for high-temperature or low-temperature reactions. This type of reactor must be heated or cooled by supporting equipment (such as a high-temperature circulator, low-temperature coolant circulation pump, high and low temperature integrated machine) to drive the circulation of refrigerant or heating medium.
3. Function:
The function of a single-layer glass reaction kettle is relatively limited, mainly used for stirring reactions under normal or negative pressure, controlling the evaporation and reflux of the reaction solution. It can also be fed through a constant pressure funnel and vacuumed for stirring reactions. Due to its structural limitations, heating or cooling reactions cannot be carried out. The laminated glass reactor has more functions, in addition to completing all operations of the single-layer glass reactor, it can also perform heating or cooling reactions. After introducing different media into the interlayer, it can adapt to different reaction conditions and achieve chemical reactions at high and low temperatures. At the same time, due to its double-layer structure, the vacuum insulation function can also be achieved through the outer layer to prevent frost formation of the kettle body at low temperatures, making it convenient to observe the reaction status inside the kettle.
Overall, there are significant differences in material, structure, and function between single-layer and jacket glass reactors. Jacket glass reactors are more common in modern synthetic chemicals, biopharmaceuticals, and new energy fields due to their double layered structure, which has more functions and higher efficiency. The single-layer glass reactor is suitable for some simple stirring reactions and other operations.
In addition to the above differences, there are slight differences in the auxiliary equipment between the single-layer glass reaction kettle and the glass jacket reaction kettle. Taking the 20L glass reaction kettle as an example, the following is a comparison between the two:
The auxiliary equipment for a 20L glass single-layer reactor mainly includes:
1. Mixing device: Usually mechanical mixing is used, and the stirring rod is driven by a motor to achieve sufficient mixing and uniformity of the reaction liquid.
2. Condenser: used to collect the steam generated during the reaction process and maintain the temperature and pressure stability of the reaction system.
3. Thermometer: used to monitor the temperature of the reaction liquid, ensuring that the reaction takes place under the set temperature conditions.
4. Pressure gauge: used to monitor the pressure of the reaction system, ensuring that the reaction is carried out under the set pressure conditions.
5. Valve: used to control the inlet and outlet of reaction liquid, ensuring the sealing and stability of the reaction system.
The auxiliary equipment for the 20L glass jacket reactor mainly includes:
1. Heating device: Usually, electric heating is used to achieve the heating and insulation of the reaction liquid by heating the thermal oil or other heat transfer media inside the jacket.
2. Cooling device: used to control the temperature of the reaction liquid and achieve cooling and insulation of the reaction liquid through cooling water or other cooling media inside the jacket.
3. Mechanical stirring device: The stirring rod is driven by a motor for stirring, achieving full mixing and uniformity of the reaction liquid.
4. Condenser: Used to collect the steam generated during the reaction process and maintain the temperature and pressure stability of the reaction system.
5. Pressure gauge: used to monitor the pressure of the reaction system, ensuring that the reaction is carried out under the set pressure conditions.
Comparing the auxiliary equipment of the two, it can be seen that the heating and cooling devices of the 20L glass jacket reactor are different from those of the 20L glass single-layer reactor. This is because in the 20L glass jacket reactor, the presence of the jacket allows for better temperature control, so electric heating is used to achieve more accurate temperature control. Meanwhile, due to the isolation effect of the jacket, it can avoid direct contact between the heating and cooling media and the reaction liquid, ensuring the accuracy and safety of the experiment. In addition, there are also differences in the mixing devices between the two. The 20L glass jacket reactor usually uses mechanical mixing, while the 20L glass single-layer reactor does not have this requirement.
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