Method for separating methanol-toluene azeotrope through continuous extractive distillation
A technology of extractive distillation and extractive distillation column, which is applied in the field of continuous extraction and distillation to separate methanol-toluene azeotrope, and can solve problems such as not being suitable for continuous production
Pending Publication Date: 2021-05-11
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
The invention discloses a method for separating methanol-toluene azeotrope through continuous extractive distillation. According to the method, butyl butyrate is used as an extraction agent, a continuous extractive distillation method is adopted to separate a methanol-toluene azeotropic mixture, methanol and toluene are mixed and fed, the reflux ratio is 0.5-1.5, the molar flow ratio of the extraction agent to raw materials is 0.5-2, the fraction at the top of an extractive distillation tower is a methanol product, the fraction at the bottom of the extractive distillation tower is a mixture of toluene and the extraction agent, discharging from the tower bottom into a solvent recovery tower is carried out, toluene is obtained from the tower top of the solvent recovery tower, an extracting agent is obtained from the tower bottom, and the extracting agent can be recycled. The method disclosed by the invention is simple in process, low in cost, easy to operate, high in continuous rectification efficiency and simple in solvent recovery, the molar fraction of the treated methanol and toluene products is not less than 0.999, and the method can be industrially applied.
Organic compound preparationDistillation purification/separation +2
Process engineeringToluene +8
- Experimental program(4)
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