Selection of Control Conditions for High Temperature Chlorination Reaction of Propylene Chloride
2023-07-10
1. Reaction temperature
The chlorination reaction is a free radical reaction in actual operation. During the reaction process, you have certain requirements for temperature, and the free radical substitution reaction cannot be carried out at a low temperature. However, as the temperature increases, the corresponding substitution reaction will also increase. The high temperature chlorination reaction of propylene is more complicated, and some side reactions will accompany this process.
2. Molar ratio of propylene and chlorine
The temperature of propylene is determined according to the ratio and the temperature of the reaction. Under normal circumstances, the temperature of the waste heat is higher. Under the condition that the reaction temperature remains unchanged, the ratio of propylene and nitrogen will also increase accordingly. If you want to take away the reaction heat in the process of propylene reaction, relevant personnel need to strictly control the amount of propylene used.
3. Response time
Propylene and chlorine will be in mixed contact within a certain reaction temperature range, and will react at the first time after contact. The length of the reaction time profoundly affects the final reaction effect. If the residence time of the reactants in the reactor is short, an incomplete reaction will occur, which will lead to the phenomenon of carbon deposition clogging equipment
4. Reaction pressure
According to the principle of the high temperature oxidation reaction of chloropropene, it can be found that the main effect of pressure on the high temperature chlorination reaction of chloropropene is small, but it will have a certain promotion effect on the side reaction, and the operation cycle of the entire reactor will be affected under the action of pressure. The high temperature oxidation reaction of chloropropene is basically a molar reaction. At the same temperature, the pressure before and after the reaction does not change much. Under other conditions, the increase of pressure will also increase the amount of carbon formed.
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