In order to ensure that the autoclave can react in various chemical media without corrosion, a polytetrafluoroethylene autoclave is lined.
First, the structure is introduced:
The main structure of the PTFE reactor is the same as that of the WHF and WDF series autoclaves. The volume ranges from 15ml to 5L, the working pressure is ≤35.0Mpa, the working temperature is ≤200°C, and the stirring speed is 20-750r/min. The material is divided into 1Gr18Ni9Ti (321), 00Gr17Ni14MO2 (316L) and other lining PTFE materials; the lid of the kettle lid is the same as WHF and WDF series, and the lining mainly refers to the PTFE sleeve in the kettle body, the flat PTFE plate in the kettle lid, and the stirring. The shaft is covered with PTFE, the stirring blade is PTFE, and the temperature protection tube is covered with PTFE. Note: The contact part with the gas phase cannot be lined with PTFE (including: magnetic stirrer and valve on the lid, pressure gauge, safety) Explosion-proof device).
Second, note: Due to the poor thermal conductivity of PTFE materials, special attention should be paid to the following points when using:
1. The temperature of the external heating furnace shall not exceed 200 °C during operation. If the temperature of the heating furnace is too high, the PTFE liner in the kettle may be deformed.
2, the heating rate should be slow, the temperature of the kettle can be gradually controlled by the temperature of the furnace outside the furnace controlled by the finished PID temperature control system. Because the stainless steel body and the temperature protection tube are lined with PTFE, special attention should be paid to the temperature difference between the heating temperature of the furnace outside the furnace and the temperature of the kettle measured by the temperature protection tube.
3, can not be used for vacuuming, not venting in the process of reaction, it is easy to cause vacuum.
3. If the pressure is high, the seal is sealed by the stainless steel kettle body and the lid of the kettle lid. During use, the corrosive medium should not be in contact with the sealing surface.
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