Is dichloroethane generated during the PVC production process?
Thread Content
I’m seeking advice from experts: is dichloroethane generated during the PVC production process? How is it produced? What impurities are present? I understand that ordinary PVC factories sell dichloroethane. I’d like to learn about the relevant information. Thank you
Yes, there are many by-products such as dichloroethane and acetaldehyde, which result from excessive temperatures in the converter and too low flow rates of the gas mixture.
If this by-product contains a high amount of vinyl chloride, how can vinyl chloride be separated?
In the PVC process using ethylene, ethylene is first reacted with chlorine to produce dichloroethane. Then dichloroethane is cracked to produce vinyl chloride. Dichloroethane can be considered an intermediate in the PVC production process.
Dichloroethane is also produced by the calcium carbide method; the reason is as mentioned above – in PVC it is generally referred to as a high-boiling substance
Different boiling points can be separated by heating.
Is there a specific process? Do we still need to add a distillation tower?
Is it possible to add a distillation tower if conditions permit? If it’s not possible to install heating pipes on the dichloroethane storage tank, heating it with steam can also work. I don’t know what use you are? Are the requirements strict?
Three distillation towers (recovery towers) are used, with steam added to vaporize the vinyl chloride