2. A 100 kg/hr liquid mixture containing 50 wt% methanol and 50 wt% ethanol undergoes a process involving two unit operations and is separated into two product streams that each contains 90 wt% of one of the components (referred to as the “methanol-rich” and “ethanol- rich” products) and a third waste stream of unknown composition. In the first unit, the mixture is separated into the above methanol-rich phase that is collected and another stream that has twice the mass flow rate of the methanol-rich phase. This second stream enters a second separation unit that produces the ethanol-rich product and another stream of unknown composition with twice the mass flowrate of the ethanol-rich stream. a. Draw and completely label the above process. b. Determine the mass flow rates of the methanol-rich product (33.3 kg/h), the ethanol-rich product (22.2 kg/h), the waste product stream (44.5 kg/h) and the stream flowing between the two separation units (66.7 kg/h). c. Determine the compositions of the waste stream (0.6 kg EtOH/kg & 0.4 kg MeOH/kg) and the stream flowing between the two separation units (0.3 kg MeOH/kg & 0.7 kg EtOH/kg)
2. A 100 kg/hr liquid mixture containing 50 wt% methanol and 50 wt% ethanol undergoes a
process involving two unit operations and is separated into two product streams that each
contains 90 wt% of one of the components (referred to as the “methanol-rich” and “ethanol-
rich” products) and a third waste stream of unknown composition. In the first unit, the
mixture is separated into the above methanol-rich phase that is collected and another stream
that has twice the mass flow rate of the methanol-rich phase. This second stream enters a
second separation unit that produces the ethanol-rich product and another stream of unknown
composition with twice the mass flowrate of the ethanol-rich stream.
a. Draw and completely label the above process.
b. Determine the mass flow rates of the methanol-rich product (33.3 kg/h), the ethanol-rich
product (22.2 kg/h), the waste product stream (44.5 kg/h) and the stream flowing
between the two separation units (66.7 kg/h).
c. Determine the compositions of the waste stream (0.6 kg EtOH/kg & 0.4 kg MeOH/kg)
and the stream flowing between the two separation units (0.3 kg MeOH/kg & 0.7 kg
EtOH/kg)
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