…and I was merely wondering why our robot with a bomb would make such a request…
so what we need is a membrane that will pass N2 and not butane...giving folks the ability to actually recover the solvent driven off in this manner.
another approach is compressing the N2/solvent mix into a secondary tank at say 20 bar, and pulling (pushing!!) the (~400ml) liquid at the bottom of said tank after an appropriate waiting period…corken should do it.
how hot is your N2?
20bar will get you liquid butane at 110C…
saves solvent & N2