I've had good success evaporating
aqueous solutions using an arrangement thus:
* Place solution in a wide dish (e.g. pyrex baking dish) on top of (optional) a reptile heating mat.
* Use a fine metal mesh (frying pan splatter guard works well) to cover the dish. This helps keep out random flying debris.
* Cut a hole in the bottom of a cheap plastic bucket and fit a computer fan inside so that the air flow is upwards through the bucket.
* Place the fan bucket on top of the mesh and switch it and the heating mat (if used) on.
* Diligently await results.
I would
NOT use this for evaporating a litre of heptane, maybe 20mL or so of ethanol or IPA in a well ventilated area.
Shame the OP was deleted, is the old version of this thread archived somewhere?
“There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work."
― Jacques Bergier, quoting Fulcanelli