- 9.0 Summary-Objectives
- 9.1 Introduction to Batch Distillation
- 9.2 Batch Distillation: Rayleigh Equation
- 9.3 Simple Binary Batch Distillation
- 9.4 Constant-Mole Batch Distillation
- 9.5 Batch Steam Distillation
- 9.6 Multistage Binary Batch Distillation
- 9.7 Multicomponent Simple Batch Distillation
- 9.8 Operating Time
- Chapter 9 Appendix A. Spreadsheet for Simple Multicomponent Batch Distillation, Constant Relative Volatility
Phillip C. Wankat discusses batch distillation, meaning when a mixture is distilled to separate it into its component fractions before the distillation still is again charged with more mixture and the process is repeated. This is in contrast with continuous distillation where the feedstock is added and the distillate drawn off without interruption. Batch distillation has always been an important part of the production of seasonal, or low capacity and high-purity chemicals and is a very frequent separation process in the pharmaceutical industry.
In this chapter we explore batch distillation. After finishing this chapter, you should be able to satisfy the following objectives:
Explain the operation of simple and multistage batch distillation systems
Discuss the differences between batch and continuous operation
Derive and use the Rayleigh equation for simple binary batch distillation
Solve problems for constant-mole, batch distillation
Solve problems in batch steam distillation with a single volatile organic component
Use the McCabe-Thiele method to analyze multistage binary batch distillation for:
Batch distillation with a constant reflux ratio.
Batch distillation with a constant distillate composition.
Inverted batch distillation.
Solve problems for simple, multicomponent batch distillation.
Determine the operating time and energy requirements for a batch distillation