Regarding the issue of cooling water temperature
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Could some expert please explain to me why the cooling water must be at boiling temperature when acetylene reacts with hydrogen chloride to produce vinyl chloride? Doesn’t a lower cooling water temperature allow for better removal of the reaction heat? And the amount of water used will also decrease. Last edited by wang*neng on 2009-3-2 08:18.]
In my opinion, the reaction between acetylene and hydrogen chloride to produce vinyl chloride is an exothermic reaction. If the temperature of the cooling water is too low, although the temperature difference increases which makes it easier to remove heat, the reaction rate also speeds up, resulting in more heat being released; this actually hinders the control of the reaction temperature. I’m not sure if this is correct – I hope experts can give me some guidance!
What was said upstairs is correct~ I thought that synthetic reactions need to be carried out within a certain temperature range! It should be between 120 and 180. This post was last edited by shizhiyong001 on 2009-3-16 at 10:43.]
Perhaps it is required that the temperature after cooling should not be lower than 100 degrees.
This is because the vinyl chloride synthesis reaction requires certain temperature control; the temperature cannot be too low
The synthesis temperature of vinyl chloride must be kept within a certain range; otherwise, the reaction will not proceed properly, and the equipment will not suffer severe corrosion. Another reason is that the hot water used for preheating the acetylene-hydrogen chloride mixture and the water used for heat exchange in the conversion process are generally from the same tank ； Therefore, it is generally required that the temperature of the hot water tank be above 80 degrees.
The water in the converter tubes can absorb the heat generated by the conversion reaction, thereby maintaining the temperature of the converter. If cooling water with a low temperature is used, the temperature inside the converter will drop, and as a result the conversion efficiency will decrease
Hot water is used to raise the temperature at the start of the reaction and to lower it after the reaction. The key factors involved are: first, the ratio of raw materials; second, the catalyst (which can reduce the activation energy by a significant amount); third, temperature (which has a similar effect to the catalyst – a certain temperature must be reached in order to meet the requirements for activation energy and to enable an efficient reaction; otherwise, if the temperature is too low, a reaction is hardly possible, let alone talking about conversion efficiency) ) Of course, too high a temperature is also not good, as it can lead to the loss of mercury chloride. Therefore, it is necessary to maintain an appropriate temperature; 120–160 is a good range, depending on the specific circumstances