[Daily Question] Basic Process Knowledge (Fill-in-the-blank) 20190216
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The difference between distillation and rectification is ( ). Answer: reflux
Distillation requires a significant difference in boiling points between the components to be separated, while distillation can achieve separation even when the difference is small. The distillation product generally has a higher purity than that of simple distillation.
Distillation involves reflux, while distillation without reflux does not.
The principle of distillation and rectification is the same; rectification involves multiple rounds of distillation in order to obtain high-purity light and heavy components
Distillation is used to separate components with small differences in boiling point, while evaporation is used to separate components with large differences in boiling point!
1. Distillation is a combination of multiple simple distillations. 2. In the distillation of systems to be separated, the relative volatility between the components is low; therefore, a large difference in relative volatility is required for distillation. 3. Distillation achieves a higher degree of separation, while distillation can only provide simple separation.