No, actually I am looking it as a cost effective method for the removal of water from MEG compared to distillation/Evaporation systems.
Although I am not directly answering this thread, I know your intention. You want an alternative method to extract MEG from aqueous MEG instead of the usual multistage distillation at reduced pressure.
According to Baker (BAKER, R.W. (2000). Membrane Technology and Applications. New York: McGraw-Hill), pervaportion with water-selective membranes should do the trick.
I also realised that i cannot extract anything from a mixture that is already frozen. How can you use fractional crystallisation to seperate 2 miscible liquids, especially when ethylene glycerol has a very high affinity for water?
F.R. Chen from Tianjin University developed a pervaporation model in 1997.
Look for this journal:
A diffusion model of the pervaporation separation of ethylene glycol-water mixtures through crosslinked poly(vinyl alcohol) membrane, by FR. Chen & H.E Chen, Journal of Membrane Science 139 (1998) 201-209