We have a BHO extraction system and have no problems purging our THC based products. However, due to the liquid nature of CBDa there always seems to be a thin film that is created on top of the oil that locks in butane and we have big issues purging the CBD products. Does anyone have some tips other than jacking the temperature up that would be helpful?
Although I must agree with the three above me, you could give a little more info when dropping that fishing line in these waters.
How do you purge? vac oven, hot plate, fan on oscillate, ect.
What kind of vessel are you collecting/purging in?
My advice pour it up like a slab. Thin layer with more surface area should help you get that solvent out lickety split! Play some old school dubstep with that heavy bass to vibrate the slab and help agitate the oil so that BHO can dance its way to the surface and out of your life.
Since it’s residual and contained in a flask, I doubt there is any potential to reach LEL of butane. I’ve used this to pull ACN from syrupy polyamide intermediates. As long as your vac pump is c1d1 and it’s residual you’ll be fine, I assure you.