In extractive distillation, solvent is_____________________?
Correct answer: D. Added to alter the relative volatility of the mixture
- A. Of high viscosity to give high tray efficiency
- B. Of high volatility
- C. Present in overhead stream
- D. Added to alter the relative volatility of the mixture
Explanation
The solvent in extractive distillation is added to change the relative volatility of the components, allowing difficult separations. It is generally a high-boiling solvent that leaves mainly with the bottoms rather than the overhead stream.
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