| 摘要 |
A process for extractive distillation, including: feeding a solvent to an extractive distillation column via a solvent feeding inlet, wherein the solvent has a feeding temperature 3.5~22.5° C. higher than a top temperature of the extractive distillation column; feeding a mixture comprising a light component and a heavy component to the extractive distillation column via a mixture feeding inlet, wherein the light and heavy components are according to the volatility after adding the solvent, wherein the mixture is liquid, and the mixture feeding inlet is lower than the solvent feeding inlet; condensing a vapor generated by the mixture in an upper portion of the extractive distillation column to obtain the light component; and separating the solvent in a lower portion of the extractive distillation column to obtain the heavy component.
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