Azeotropic separation of ethylenediamine and water
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I would like to ask how the azeotropic composition of ethylenediamine and water changes under reduced pressure, and whether separation is possible
Could we check the azeotropic composition under reduced pressure? If it’s an azeotrope, then what’s the point of separation? Does reduced pressure mean no azeotrope? Let’s wait for an expert to answer this question
LS is the correct answer; you can use relevant software to check it yourself
No gas-liquid equilibrium data were found under reduced pressure, so a regression of the binary interaction is not possible! The software simulation also shows a significant deviation from the actual situation!
It seems not to work; others apply pressure
You can try salt-added extractive distillation
One can examine the azeotrophic compositions of ethylenediamine and water at different pressures; if there are significant changes, a pressure-swinging distillation process can be employed to separate ethylenediamine. Variable-pressure distillation is, in fact, a relatively classic method for separating azeotropes, aside from extractive distillation and azeotropic distillation.
At atmospheric pressure, the azeotrope temperature is 119°C with a water mole fraction of 0.443; when the pressure is reduced to 6.7 kPa, the azeotrope temperature drops to 55.6°C and the water mole fraction becomes 0.5647. Separation is possible using a double column setup, though it may require some energy
Okay, thank you! ! ! ! ! ! I’ll give it a try