Chemical engineering competition simulation
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Adding the extractant ethylene glycol can break the azeotrope between cyclohexanol and water (containing a small amount of ethanol), allowing water (with less than 10 ppm ethanol and less than 30 ppm cyclohexanol) to distill at the top of the tower, while the rest comes out at the bottom of the tower? ? ? ?
This needs to be filtered; it cannot be answered directly. In principle, ethylene glycol can indeed be used as a heavy entrainer in the extractive distillation for alcohol dehydration, but for low-carbon alcohols such as ethanol and propanol, it results in water being extracted to the bottom of the tower ； In this system, the boiling point of ethylene glycol is 197°C, while that of cyclohexanol is 162°C; it is likely that ethylene glycol is extracted to the bottom of the tower, and the difference in boiling points is moderate, which facilitates the recovery of the heavy entrainer. What you need to examine is the effect of adding ethylene glycol on the relative volatility of cyclohexanol and water
I’m very frustrated because I wasn’t able to obtain results that meet the standards using ASPEN; I can’t find a suitable extractant