So we are getting roughly 50% yield on 80% potency CBD 2nd pass distillate using pentane.
Any suggestions on getting a higher yield from my solution?
Hearing wiped film distillate yields upwards of 80% by weight. Can anyone support this?
What kind of yields are y’all getting?
How cold are you getting mixture for crystallization?
As cold as my -80 ultra low freezer gets it. So I’d say probably around -60 or so
Im at about 60-65% recovery by weight, with an unwinterized first pass, coming out of a shortpath.
What are your soak times??
Whats your extraction method??
Refinment filtration methods?
Your 4:1 pentane to distillate ratio is WAY above what I see anyone else mention, yet you seem to be getting better yields than most. Do you think you lose a lot of that pentane to evaporation seeing that you heat the distillate so far above the pentane BP in your procedure?
undoubtably i do lose quite a bit, but i think heating up the solution and letting some boil off increases the supersaturation and increases the yield(hopefully somone more educated can chime in on this). Also i feel letting some of the solvent boil off, means that you achieve that supersaturation level every time.
the trays of isolate i make now start spontaneously crystallizing as soon as i take the heat off. Ie an instant drop in temp(input energy) = instant drop solubility = no place for the material to “go”, it has to crash. I have a cool video id like to share of spontaneous crystalization, ill see if i can figure out how to upload it on to this thread
crystalization happening as soon as the solution is removed from the heat. my potato cell phone camera doesnt do it justice
Oh that is badass! Are you agitating it or is the movement of the liquid just from moving the tray off heat?
thats just from the residual heat(convection currents maybe?) and left over movement from stirring the liquid to get everything into solution
looks wild tho, you can see the streaks of CBD(?) kinda spiraling and converging to a single point where the majority of the crystallization is happening lol. My camera doesnt do it justice
I’ve seen many people using 4:1… what are you normally seeing?
I’m typically seeing 2:1 and even 1.6:1. Now that I looked back at my notes though, I used 2:1 volume crude to pentane when I attempted a crude isolation months ago. Probably explains all the impurities I got in that experiment.
Definitely looks impressive! I’m going to have to order some of those trays. I read on here one guy saying he was agitating after taking off heat and before sticking into the freezer and his yields were almost as good if not a bit less than yours if memory serves me right. So I was wondering if that was a necessary step for good yields or not.
yeah the trays rock, you can scale up with them fairly well, and they are cheap and ubiquitous.
Ive always found that a lower ratio of solvent:distillate yielded discolored crystals, i tried everything and right now at 3.7:1 i think ive found my sweet spot. Try a 3.7:1 and see what you get.
ive yet to try and crash crude, but its certainly an experiment on my radar, what were your results like?
That’s what I got. Though I do still have about 50 grams of that crude at a friend’s house. I think I’ll try it again with a ratio more like what you’re talking about. If he didn’t already smoke it all anyway…
not bad, very dirty but atleast you have crystallization! its just “full spectrum isolate” hahaha:p
you may be able to clean that through washing and recrystalization. Id crush them down and create as much surface area possible, cryo pentane wash it, then throw it in the vacc oven to dry, then recrystallize in pentane.
Clean crystals! Any input for me ? Im using a vta and using 2nd pass dist with a 2:1 with pentane but all my crystals come out with alot of color (untill i crush and rinse but id love to ve able to have crystals woth clarity like that !
Increase the solvent ratio, it should crash cleaner. I get the same yields with 2:1 and 3:1 (heptane:distillate) but the 2:1 has more impurity in the crystal structure if it’s the initial crystallization.
Right on thx , ya im hitting 85% on hplc testing right now but ive got a pure white crystal powder im baffled at the low %
Who did you test with? What was the starting potency of the distillate, if you tested it?
I’ll drop off a samples for testing next week (2:1 followed by 3:1 - instead of a cold rinse 
)
Used vta distillate untested but im sure over 70% when you say 3:1 thats dist to pentane or pentane to dist ?
Heptane: distillate (as noted in Post #16)
