Batch Extractive Distillation in a Column with a Middle Vessel

摘要

Batch extractive distillation was studied in a column with a middle vessel. The process was simulatedby a constant holdup model and solved by two point implicit method. Acetone and methanol mixture was separatedin such a setup using water as solvent. The simulation agrees well with experimental results. The experimental andsimulation results show that the solvent at the bottom and the product at the top of the column can be withdrawnsimultaneously for a long period of time. It needs more time for the solvent to reach high purity than that requiredfor the more volatile component to reach high purity, so that the time to withdraw solvent from the bottom isdelayed.