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Vinyl chloride is used to make polyvinyl chloride, or PVC , a widely used plastic with many applications. As part of the process to produce

Vinyl chloride is used to make polyvinyl chloride, or PVC, a widely used plastic with many
applications. As part of the process to produce vinyl chloride, ethylene is reacted with
chlorine gas to produce 1,2-dichloroethane. 1,2-dichloroethane is then heated to produce
vinyl chloride. You are tasked with designing a flash drum to remove unreacted ethylene
from 1,2-dichloroethane before the heating step so the ethylene can be recycled to the
reactor. 90mols of a mixture of 86mol%1,2-dichloroethane (DCE) and 14mol% ethylene
(E) at 298.15K is to be flashed from 5 bar to 2 bar. The desired liquid composition is 97
mol%1,2-dichloroethane. Assume Raoult's Law applies (an ideal mixture). Antione's
Equation (log10) parameters are given below for P(?bar) and T(K).
a. Draw a process flow diagram and do a degree of freedom analysis.
b. Calculate the temperature (K) of the flash drum and the molar flow rates
(mols) and compositions of the produc
1t streams analytically.
Ethylene: A=3.87261. B=584.146. C=-18.307
1,2-dichloromethane: A=4.58518. B=1521.589. C=-24.67

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