I’ve been running distillates for a few years now. I just had buddy bring me CBG crude processed with cold ethanol extraction. Starting level COA listed as 45.6%.
When I get to around 180°C it starts to very rapidly bubble and climbs right to the neck of the boiling flask. I’ve let it run right at that threshold for over 2 hours with little change. There is a very slow dribble into my head, but not really any obvious reflux on the vigruex.
Setup is a 2L SPD with a precision D-25 pump (.9cfm, .1micron).
So, I just said to hell with it and pushed on temp. Boiling did not breach the neck, but stayed at that level for quite a while even as fraction collected.
So is this common with CBG or do I need to speak with extractor to find out what methods he is using?
when CBG crude is free of solvent it rocks up pretty bad, the phenomenon you are experiencing happens because the vapors cannot escape the crude as the viscosity is way low and surface tension is high, so it foams up. We call this muffining.
The way to get around this is to Increase the heat. When you increase the heat, viscosity rises, everything melts, and it becomes much much easier for the vapors to escape the organic matrix and saves you from bumping.
Yep, makes sense. I kinda had a feeling this was the case, as I noticed how what was left in original packaging that was spilled during delivery turned solid pretty quick.
CBG allegedly has a much lower boiling point than CBD or THC. I’ve seen charts showing somewhere between 120F-130F. Not sure if this could be relevant to your process.