What are the key operations for safe production in polymerization?

You’re referring to production by suspension method! The most crucial aspects in polymerization are the control of temperature and pressure! My personal understanding!

Temperature, pressure, and dispersion system are set up

I think the main points to pay attention to are: preventing overheating and overpressure, preventing leaks, preventing power outages, and preventing the equipment from operating beyond its capacity.

It mainly controls the reaction temperature and pressure in the polymerization reactor. Reasons for the sharp increase in temperature and pressure in the polymerization reactor and countermeasures. ①Insufficient cooling water temperature and volume: Increase the amount of cooling water; if necessary, use water from the bottom of the tank. ②Circulation pump trip: adjust the reactor contents or discharge the material in advance; a small amount of terminator can also be added. ③Excessive amount of initiator used: Dilute with high-pressure water and add a small amount of terminator. ④Insufficient amount of dispersant leads to coarse particles: Apply high-pressure water and vent the gas to recover some of the VC gas. ⑤ Stop stirring: Vent the gas for recovery and discharge the product in advance.

I believe the following points should be taken into consideration during actual operation: 1. The polymerization formula must be appropriate. 2. Special attention should be paid to the dispersion system to prevent any abnormalities in dispersion. 3. The initiator chosen should be suitable to avoid runaway polymerization or prolonged reaction times. 4. The stirring power needs to be monitored. 5. The polymerization temperature must remain stable. 6. The polymerization pressure needs to be under control. 7. Emergency procedures must be well known. 8. Utility systems must operate continuously and properly. 9. Inspections must be carried out promptly in accordance with regulations. 10. Employee safety measures must be properly implemented

1. Polymerization ingredients 2. Feeding (accurate) 3. (Careful) monitoring 3. Emergency measures (must be familiar with) 4. Proper functioning of utility systems 5. Inspections (performed promptly in accordance with regulations)

To be honest, the process of producing acetylene from calcium carbide, followed by the addition of vinyl chloride and subsequent polymerization to form PVC, is quite outdated. And it causes a lot of pollution! A more advanced method is the catalytic cracking of natural gas to produce acetylene. The most important factors in the polymerization process are: 1. Monomer concentration. Polymerization reactions are generally quite sensitive, requiring a high concentration of the reacting monomers. 2. What is the optimal range for catalyst concentration? This generally serves as the basis for adjusting the polymerization conversion rate. If the catalyst concentration is too low, the polymerization conversion rate is too low, resulting in a high amount of monomer in the polymer. This makes it more difficult to remove the monomer after the reaction and increases production costs. If the catalyst concentration is too high, violent polymerization may occur, causing the polymer to clump up in the reactor, regardless of subsequent processing. 3. Temperature and pressure control range 4. Amount of molecular weight regulator

It mainly controls the reaction temperature and pressure in the polymerization reactor. Reasons for the sharp increase in temperature and pressure in the polymerization reactor and countermeasures. ①Insufficient cooling water temperature and volume: Increase the amount of cooling water; if necessary, use water from the bottom of the tank. ②Circulation pump trip: adjust the reactor contents or discharge the material in advance; a small amount of terminator can also be added. ③Excessive amount of initiator used: Dilute with high-pressure water and add a small amount of terminator. ④Insufficient amount of dispersant leads to coarse particles: Apply high-pressure water and vent the gas to recover some of the VC gas. ⑤ Stop stirring: Vent the gas for recovery and discharge the product in advance.