Seeking advice on the method for determining the physical properties of NMP+H2O extractive distillates
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I used NMP+h2o to simulate the extraction of butane and butene. Theoretically, water should be present together with NMP, but currently all of the water comes out from the top of the catalytic distillation column and the stripping column; I’m not sure why. I used the NRTL equation for this calculation. After trying other UNFIAC equations, it seems that water also exits from the top of the tower. I would appreciate some guidance from those with more experience
NMP, butane, and butylene are all organic solvents; based on the principle of like dissolves like, NMP may dissolve in butane and butylene, so most of what comes out at the top of the tower is water.
Check whether the binary interaction parameters are complete.