Double Jacketed Reactor

The double jacketed reactor reactor is made of double-layer glass, and its inner layer can be filled with reaction solvents for stirring and reaction. In addition, the interlayer part can be controlled for condensation or heating according to different temperature requirements.

Glass reaction kettles are commonly used and are widely used in industries such as modern fine chemical, biopharmaceutical, and scientific research experiments. They can perform processes such as concentration, distillation, reflux, separation, and purification reactions under constant speed, force, and temperature conditions. They are ideal equipment for teaching, experimentation, pilot testing, and production. Glass reaction kettles can generally be divided into two categories: double-layer glass reaction kettles and single-layer glass reaction kettles. Among them, the double-layer glass reactor is currently a commonly used equipment in laboratories, widely used in fields such as medicine and biopharmaceuticals.

Simply put, a double-layer glass reactor is based on a multifunctional single reactor. And after years of improvement, this reactor is based on a single multifunctional glass reactor, achieving convenient high and low temperature control, rapid heating, experimental process cooling requirements, modern laboratory, chemical, pharmaceutical and other requirements.

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Double layer glass reaction kettles are generally classified according to the heating form of the jacket, and are divided into electric heating rod heating, steam heating, and thermal oil circulation heating reaction kettles.

The electric heating reaction kettle uses an electric heating rod to heat conduction oil, which is used as the medium to transfer heat to the materials inside the kettle.

The steam heating reaction kettle is heated by filling steam into the jacket, requiring the addition of a boiler. The hardware investment is slightly higher, but the energy consumption of the branch is smaller than that of the electric heating jacket reaction kettle.

The thermal oil circulation heating reaction kettle mainly achieves thermal oil circulation heat transfer or cooling through the coils inside the jacket.

Structure of double jacketed reactor:

The double-layer glass reactor has standard components including a stirring motor, governor, condenser, continuous titration funnel, vacuum plug, vacuum suction head, thermometer shell, reaction kettle, and two meters of thermal conductive silicone rubber tube. Under constant temperature conditions, the stirring reaction can be operated under normal pressure and negative pressure according to usage requirements. In addition, reflux and distillation of the reaction solution can also be carried out. Therefore, double-layer glass reactors can be used for the synthesis of biopharmaceuticals, fine chemical plants, and new materials.

The reactor body of a double-layer glass reactor is divided into two layers, with the outer layer and the middle part of the inner layer called the interlayer. The inner layer is used to place the reaction solvent for stirring reaction, and what is the role of the interlayer? It is reported that the glass reactor can not only complete high-temperature experiments but also low-temperature reactions. But the single-layer glass reactor itself has a heating device, while the double-layer glass reactor does not, so the interlayer plays a very heavy role.

On the outer side of the kettle, various shapes of jackets are installed by welding or flange connection to form a closed space with the outer surface of the kettle;

In this space, a heat carrying fluid is introduced to heat or cool the material, maintaining the temperature of the material within the specified range. This structure is called a jacket.

 

Double layer glass reaction vessels are commonly used as pressure vessels in industries such as petroleum, chemical, pesticide, pharmaceutical, food, etc., to complete processes such as thinning, chemical, hydrogenation, alkylation, polymerization, and condensation.

Structure diagram of public double-layer glass reaction gold and the names and uses of each component

1. Motor: Adopting a low-speed booster motor and reducer can ensure long-term mixing operation of the equipment. In addition, explosion-proof motors or DC brushless motors can be selected according to user needs.

2. Constant pressure drip hopper: Equipped with a high vacuum PTFE hand valve, it can ensure constant internal pressure and has anti backsuction function.

3. Universal joint: The universal joint has the function of variable angle transmission, connecting the motor to the mixing rod, making the mixing function of the equipment more stable.

4. Mixing rod: Made of PTFE material, it is resistant to high temperature, corrosion, and acid and alkali corrosion.

5. Mixing seal: double seal with tetrafluoride component and mechanical component, ceramic bearing

6. Vacuum gauge: Real time monitoring of pressure inside the kettle.

7. Kettle cover: adopts a seven port open L design, which includes agitator port 60 #, temperature sensor port DN25, condenser connection ball mill port 50 #, constant pressure funnel port 40 #, solid feed port 80 #, and exhaust valve 34 #, liquid rubber port DN25.

8,9. Upper and lower fixtures of the kettle cover: They serve to fix the kettle cover and the kettle body.

10. Vacuum interlayer: Provides excellent insulation and prevents temperature loss

11, 12, Circulating liquid interlayer: By connecting low-temperature cooling wave circulating pump, high and low temperature integrated machine and other equipment, it can provide low-temperature or high-temperature circulating liquid for heating or cooling the test materials inside the kettle.

13,14. Aluminum fixtures and PTFE gaskets: They serve to fix the discharge valve and have good sealing performance.

15. No dead angle discharge valve: It makes the discharge work clean and fast, and the detachable design facilitates the discharge of solids, particles, and high viscosity experimental materials. 16. Evacuation valve: The protective device can prevent accidental damage to the reactor during rotation, improving the stability of the reactor. 17. Condenser vacuum suction port: By connecting a vacuum pump to depressurize the condenser and improve its condensation efficiency 18,21. Cooling water connection port: By connecting cooling circulators such as low-temperature coolant circulation pumps, low temperature is provided to the condenser and condensation efficiency is accelerated. 19. Coil condenser: Adopting a double-layer coil design, it expands the contact range with gas substances and improves condensation efficiency. 20 silicone fixing ring: used as a fixing ring for a condenser.

22. Liquid separator: used to separate liquid from liquid

23. Discharge valve: controls the discharge of materials in the liquid separator

24,25 dual display panel for temperature and speed: The control panel of the entire machine will display both temperature and speed in digital form on the screen, making operation simple and fast

26. Vacuum interlayer suction port: used for vacuuming operations in vacuum interlayer.

27. Kettle support device: used to fix and support the reaction kettle body

The working principle of a double-layer glass reactor is:

A device that uses a stirrer to mix two or more liquids and liquids with solid or gaseous materials of a certain volume under a certain pressure and temperature, promoting their reaction. The jacket on the kettle body is mainly used for heating and cooling modules.

The industry has stated that the heating of the double-layer glass reaction kettle is completely achieved through the interlayer. Specifically, by connecting the double-layer kettle to the circulating oil bath interlayer and passing heat transfer oil, the material can be heated by plugging in the power supply; The same applies to low-temperature reactions, as long as the solvent in the interlayer is replaced with ethanol. The interlayer can ensure uniform heating of the material and facilitate direct observation of the stirring reaction process of the material. Therefore, the role of the interlayer in double-layer glass reactors cannot be underestimated, which is also the reason why double-layer reactors are becoming increasingly popular.

The use of double jacketed reactor:

The double-layer glass reaction kettle has a condensation system, a dripping system, and a stirring system. The interlayer of the kettle body needs to be connected to an external heating or cooling circulation device, and the supporting temperature control equipment, vacuum device and other system devices are used together. When the reaction materials react, pass The interlayer of the glass reactor is injected with a circulating solvent to perform a chemical reaction at a specific temperature on the reactants in the glass reactor. Under the condition of setting constant temperature, in a closed glass reactor, the evaporation efficiency can be improved under vacuum conditions. The steam generated during the reaction is cooled into a liquid when it passes through the serpentine glass coil, and then flows back into the glass reactor, or it can be directly processed. Recycle. After the reaction is completed, the material can be released from the side outlet of the kettle body. The lower outlet has a flange mouth and a polytetrafluoro valve. There is no dead angle in the container and no liquid discharge.

 

The double-layer glass reactor is injected into the circulating hot solution (hot water or hot oil) or cooling liquid (freezing liquid) through the interlayer to perform high-temperature and low-temperature reactions. The double-layer glass reactor produced by Zhengzhou and Huachen Instrument Co., Ltd. is equipped with The constant pressure funnel reduces the influence of the increased reactant on the air pressure, so that the reactant in the funnel flows smoothly into the reactor at a certain rate under normal pressure to prevent back suction; the integrated condenser adopts an upright double-layer serpentine coil , to ensure a high recovery rate of the reaction solution; the mixing system adopts double bearings and double skeleton oil seals, which are resistant to high temperature, wear and tear when in use, and have good sealing performance, which ensures the smooth progress of the reaction in the kettle and reduces the impact of external conditions on the reaction in the reaction kettle Influence; The liquid crystal display accurately displays the data, and the operation is simple.

 

The double-layer glass reactor is equipped with a suitable high-temperature circulator for high-temperature reactions, and the temperature can reach 300 degrees Celsius. In addition, it is equipped with a low-temperature coolant circulation pump for low-temperature reactions, and the temperature can be as low as -80 degrees Celsius. Zhengzhou Huachen Instrument Co., Ltd. double The double-layer glass reactor is made of high borosilicate glass and polytetrafluoroethylene material, which has stable performance and is not easy to react with reactants. It is easy to operate and easy to use. The double-layer glass design increases the safety of the experimental process. Co., Ltd.'s double-layer glass reactors are widely used in modern teaching, synthesis of new materials, biopharmaceuticals and academic research and development. In the 21st century with the rapid development of chemical and physical reaction instruments, double-layer glass reactors have developed steadily in the field of chemical instruments. Zhengzhou Huachen Instrument Co., Ltd. integrates R&D, production and sales. Driven by innovation, keep up with development, and strive to create high-quality products. Knowing the principle of using the double-layer glass reactor can help us to carry out the experiment smoothly!

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