Problems in vinyl chloride synthesis.

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1. Process diagram for synthesis. 2. Consequences of hydrogen chloride and chlorine-containing monomers. 3. What else should be considered when checking for hydrogen presence before starting up the synthesis furnace. 4. Why does the purity of hydrogen chloride decrease in each furnace when the total pressure in the chlorine and hydrogen pipelines remains unchanged? 5. What are the consequences of introducing air during the process of shutting down the synthesis furnace? 6. What precautions should be taken during replacement operations if the initial attempt to start the furnace fails? 7. What pressure level is required for the water in the synthesis furnace, and what temperatures should be maintained at the inlet and outlet of each furnace’s condenser? 8. What measures should be taken by the synthesis furnace when the circulating water supply is interrupted? 9. What are the procedures for increasing or decreasing the production volume of the synthesis furnace? 10. How should the valves for gas supply and acid production be controlled when there is a reverse flow of gases in the synthesis furnace? 11. When the synthesis furnace is operating normally, should the sampling tube be filled with gas all the time, or only at certain times? 12. How should fluctuations in the flow rate of chlorine or hydrogen in the synthesis furnace due to hydrogen-related issues be handled?