I’ve read a bunch on here that somewhere between -40c to -86c is the ideal solvent temperature for etoh extracts, and a soak time anywhere from 2-20 mins.
I’m curious if anyone’s spent the time isolating variables of time and temperature for efficiencies sake at scale. Going through dry ice, or even the extra time/energy needed on a cryo chiller to get the ethanol from -20 to -30 to -40+ starts to bottleneck any process and the energy use grows exponentially.
I was curious about doing some flash pulls (under 1 min) (maybe in my new panda?) at some easier to hit temperatures (-18, -25, -30). Has anyone tried this kinda thing? I’m trying to make shatter so I’m guessing if i start picking up much waxes it’s going to be problematic.
If it hasn’t been done I’ll eat my hat… However, I haven’t been able to find any publicly available data.
If someone wants to finance my R&D efforts to the tune of about $25k USD I’ll share the room temperature extraction data I plan on generating later this year. Cryo testing might appear on my roadmap at some point in the future.
The metrics I’m most worried about is texture and colour when it comes to shatter. There’s a disconnect in the market between potency and price. People don’t pay per mg of thc, so it’s almost beneficial to have a 70% etoh shatter instead of 85%. I guess there’s theoretically a sweet spot in time and temperature to get the highest shatter yield before it goes waxy.
The notes are long since lost, but I found -40c, using dry ice directly in my solvent, with a 10 minute soak time, solvent reusued 3-4 times before recovering, to be the best bet for the time/place.
Recovering residual solvent from the flower with a centrifuge (washing machine in this case) is crucial to maintaining yields.
Based on color, lack of need to winterize,and residual Cannabinoids on flower (tested by washing a jar of spent flower a second time with fresh solvent, then recovering and analytically testing that crude)
I’d say we were recovering 75-80% of the total available Cannabinoids, which was perfectly suitable for 5+ years of old OMMP biomass “Trashbag Mountain”.