Hi Reda, I am in a similar sort of situation. Please take a look at the following video: http://www.youtube.com/watch?v=u3Qq6lTFFJw

This might help you a bit.

I have to simulate deep eutectic solvents' VLE. I was thinking to use Aspen plus, but couldn't figure out a way of doing so. So much of thermodynamic property data is missing for these solvents. Nevertheless, in case of Ionic Liquids, I am sure there's a lot of published literature and they can be modeled in Aspen Plus.

I hope this helps.

best wishes.