Super bump! I discovered this thread through a google search.
This guy I knew did the same thing, except during a mesc (torch) extraction, luckily not with the whole batch. Separating the stuff that had acetone in it into seperate jars, he added a little water to hold onto the acetone while the xylene rose to top, thinking that would work. It appeared to, as there were three distinct layers (basified cactus sediment, an aqueous layer (water + acetone?), and an oily layer (xylene?)).
Would the free mesc go to the xylene layer?