Have figured out most of the process but for some reason am getting very acidic crude from our Apeks system. Currently am running 1700-1800psi and 90-100f temperatures and getting good yields but then when mixing the crude with ethanol for winterization is coming back very acidic with the crude testing at 3-4 PH any thoughts? Was thinking maybe it’s the water content mixing with the co2 but am stumped.
Are you decarbing before extraction? Sometimes water from your biomass can mix with the C02 and cause acidic vapor. Are your small micron filters or pipes rusty? Ran into the same issue you have.
This can happen with decarbing etoh crude too from the acid converts to C02. Im just an untrained wannabe though.
We are decarbing after co2 extraction and winterizing in ethanol. So we take flowers to co2 extraction for crude, then mix with ethanol to winterize then filter with no media just a micron screen and decarb on a hot plate. You think we should decarb the flower before? I have no experience on a Apeks but the lab tech here has some so looking for other pointers or knowledge.
How are you testing your crude pH? The pH scale is with reference to equilibrium in water. A measurement from just sticking a pH probe in crude may be misleading. Washing with water and testing wash pH may be more informative…or comparing a direct crude pH meter measurement with a crude that you know is good.
Usually we used 116c or 242F until bubbles stopped. Stir it every few minutes. If you plan on distilling afterwards then you can go to a higher temp to pull more volatile and terps off. Makes the terp strip easier and faster
We do distill after on a WFE so ran a little hotter at 140c but could try lower maybe? Just unsure where the acidic conditions or d8 are coming from. Going to test the decarbed crude and see if it’s changing to d8 in the decarb process maybe?
I think it’s acidic from the extraction side via C02. Maybe a weak grade of C02? What’s the moisture content of your biomass? I usually wfe at 165 fp.
The D8 is most likely from the crude being so acidic in the first place. Are you scrubbing with ac? Any clays?