Too much dichloroethane is produced as a by-product of conversion – how to reduce it?
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The temperature of the converter is kept around 165 degrees. Recently, the production of dichloroethane has been high; what are the reasons that could increase its production?
It might be related to the acetylene flux of your converter; the flow rate of the converter shouldn’t be too low, as this can also lead to the formation of by-products.
C2H2 + HCl → C2H3Cl; C2H3Cl + HCl → C2H4Cl2. An excessively low operating space velocity in the converter, as well as an excessive ratio of HCl in the feed, can both lead to an increase in the formation of dichloroethane as a byproduct.
His reaction at 165°C, when the reaction temperature is just right, is mainly due to the low flow rate
It’s likely due to too low flow rate, resulting from long-term operation at low load.
Take a look at what model of catalyst your family is using; the main issue is that there is an excessive amount of hydrogen chloride.
If a low-mercury catalyst is used, the temperature is already too high