Intermittent extractive distillation separation method of methanol-methyl propionate azeotropic mixtures
A technology of azeotropic mixture and methyl propionate, which is applied in the field of batch extraction, rectification and separation, can solve problems that have not been seen before, and achieve the effect of flexible operation and low equipment investment
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Embodiment 1
[0011] Using a batch extractive distillation device, put 500L methanol-methyl propionate azeotropic mixture into the heating kettle (48% methanol, 52% methyl propionate, both are mass percentages). The selected extractant for the experiment is toluene, and the heating is turned on. The heat source of the kettle and the cold source of the condenser. After the top of the extractive distillation tower has been refluxed for a period of time, the temperature at the top of the tower is stable. Add the extractant. The feed position of the extractant is near the top of the tower. Control the addition rate of the extractant to 500L / h, with total reflux Operation, when the top temperature of the extractive distillation tower is 64.2-66°C, the methanol content in the distillate is greater than or equal to 99% to start discharging, the reflux ratio is 3:1, and the discharging speed is 200L / h. When the temperature at the top of the extractive distillation tower is 66-79°C, produce the methan...
Embodiment 2
[0013] Using a batch extractive distillation device, put 500L methanol-methyl propionate azeotropic mixture into the heating kettle (42% methanol and 58% methyl propionate, both are mass percentages). The selected extractant for the experiment is ethylene glycol. Turn on the heat source of the heating kettle and the cold source of the condenser. After the top of the extractive distillation tower is refluxed for a period of time, the temperature at the top of the tower is stable, and the extractant is added. The feed position of the extractant is near the top of the tower, and the extraction rate is controlled to 800L / h. Full reflux operation, when the top temperature of the extractive distillation tower is 64.2-66°C, the methanol content in the distillate is greater than or equal to 99% to start discharging, the reflux ratio is 2:1, and the discharging speed is 300L / h. When the temperature at the top of the extractive distillation tower is 66-79°C, produce the methanol-methyl pr...
Embodiment 3
[0015] The experimental device and operation method were the same as in Example 2, and the extractant was glycerol.
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