Is it ok to salt out water saturated butanol with Potasium Carbonate and then fractionally distill it
Yea its ok, but what are you trying to do?
Salt it out, then separate with a seperatory funnel.
Then dry it with a drying agent(dry MgSO4).
This will give you dry butanol.
If your worried about other contaminates then distill, but if I was you I would dry it before distilling.
What butanol do you have?
normal, secondary or tertiary?