Chapter 8: Introduction to Complex Distillation Methods

We have looked at binary and multicomponent mixtures in both simple and fairly complex columns. However, the chemicals separated have usually had fairly simple equilibrium behavior. In this chapter you will be introduced to a variety of more complex distillation systems used for the separation of less ideal mixtures.

Simple distillation columns are not able to completely separate mixtures when azeotropes occur, and the columns are very expensive when the relative volatility is close to 1. Distillation columns can be coupled with other separation methods to break the azeotrope. This is discussed in the first section. Extractive distillation, azeotropic distillation, and two-pressure distillation ...

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