PeterAB;
In the south of the US, we use peanut and cotton seed oil for everything. These oils should have BTUs & ignitability should be low. There's nothin smells better than fresh hot roasted peanuts so your environmental compliance man will turn his head when it comes to this regulated...
Substituting IPA for acetone does not improve ignitability issues. It does provide management the option to dispose of their excess IPA as rubbing alcohol where everyone walks out wearing the waste. (This is a joke. Do not rub on the skin nor smoke around either solvent.)
I'm trying to concentrate or condense methylene chloride air or vapor stream back to liquid form. Solvent is carried through pipes with nitrogen.
We've used 20 degree chillers on shell & tube exchangers channeled to a water stripping column. Pitiful capture results with the concentration of...
Could you use a low or non volatile organic liquid, oil? as your collection material. When the oil becomes saturated, fuel blend it at relatively low prices.
It's very likely you work in a boat or fiberglass production facility. Upon these assumptions, you can forget any of the chlorinated solvents as substitutes. You'd be swapping more expensive solvent and health concerns for less expensive,not including fire insurance, but flammable acetone...