Glass reactors play an integral role in chemistry laboratories. Improper use can lead to serious consequences, so be sure to pay attention to safety issues. Let's introduce the safety of ordinary glass reactors.
1. The temperature rises too fast: The material in the glass reactor is too fast, the cooling rate is low, and the condensation effect is poor, which may cause the material to boil and form a gas-liquid mixture, thereby generating pressure. Exhaust pipe, gas phase pipe, etc. Pressure reduction and relief systems (such as safety valves and rupture discs) are used to relieve pressure. If the perforated material cannot achieve rapid decompression of the submerged fruit, it may cause the kettle body to explode.
2. Maintenance of hot fire: During the reaction process of the glass reactor, if effective preventive measures are not taken to perform maintenance operations such as electric welding and gas cutting, or tightening bolts, electric shock and knocking will generate sparks. Once flammable and explosive materials are encountered, Leaks may cause fires during maintenance incidents.
The above are several common safety issues with glass reactors. When using them on a daily basis, you still need to pay attention to many details to avoid accidents as much as possible.
Due to the characteristics of the glass material and the supporting iron frame, many details need to be paid attention to during the use of the glass reactor. It is difficult to understand the problems present in double-glazed reactors. I will cover some issues that are easily overlooked. The glass reactor is used as a reaction amplification test device, and the volume is usually 50-150L. Volumes can be customized in specific situations. Therefore, the scale of testing should not be underestimated. Since the body of the kettle is made of glass, the stainless steel is the stand, and the legs are casters, the storage location needs to be chosen carefully.
Although the casters can be fixed with foot buckles, they are not very stable. Therefore, when storing, pay attention to choose a flat place, lay it flat, and keep the mechanical stirring center and the reactor consistent, otherwise it will easily shake and become unstable. Safety accidents must be placed in a well-ventilated place.
For the explosion-proof design of glass reactor, the motor and power controller are mainly set as explosion-proof motor, explosion-proof switch and explosion-proof power controller. General manufacturers can provide installation, the cost is slightly more expensive, but it is worth it for safety reasons. Due to the large amount of solvent in the reaction, the surrounding air is prone to high concentrations. Therefore, all necessary gas alarms are required in the workplace. Do not pile solvent or debris around the reactor and ensure safe passage.
The glass reactor is an independent reaction rack. Different from the industrial reactor, it has a reaction rack and the reserved feeding port is very small, so the feeding process is difficult. The amount fed at one time should not be too large. Evaluate the temperature, reflux and pressure of the reaction and add the appropriate amount of material. Generally, the maximum feed volume should not exceed 2/3 of the kettle body.
According to the required reaction temperature, temperature control media with different properties are selected as the heat transfer media for the reaction. If the temperature is low, choose an ice ethanol bath; if the temperature is room temperature, choose a water bath; if the temperature is high, choose an oil bath. When using low or high temperatures, pay attention to choosing the appropriate medium. The key is viscosity. If the viscosity is too high, the circulation pump may not be able to move, the media circulation effect is not good, and the required temperature control effect cannot be obtained. The rapid replacement of the high-power circulation pump will cause the pressure of the pressurized medium to be too great, and the lining of the double-layer glass reactor will be easily damaged and the reactor will rupture. usually,
Since the thickness of the middle layer in the middle of the glass reactor is small, the insulation performance is poor. In the process of using high and low temperatures, insulation materials must be used to protect the pot body. For the kettle body and catheter tube of the reaction kettle, the insulation material must be wrapped, and the thickness of the insulation layer must be paid attention to to ensure a better insulation effect.
