either get an ethanol recovery system, or don’t bother recovering it.
your boss paid ~$2k for the solvent (assuming beverage grade), offer to blow it off to atmosphere with a $40 used commercial rice cooker. point out that he will then need to buy more solvent.
you can triclamp a 2" spool to an unmodified beer keg and make a still for less than $200. you’d be done in a week.
http://rainierdistillers.com/stills-for-sale/
yep. that is what you’re doing 
** why a rice cooker? They turn off when they’re done evaporating…if you disable the “warm” feature. I used to use them once upon a time, before switching to Ethanol from Iso.