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04/02/2025 9:39 pm
Hey everyone, I wanted to start a discussion about supercritical vs. subcritical CO2 extraction and hear what methods people are using.
From my experience, supercritical CO2 extraction is great for getting higher yields and pulling a full spectrum of cannabinoids, but it can also extract unwanted lipids and waxes. That means extra post-processing, like winterization, is usually needed. It’s also a more aggressive process, which can sometimes degrade terpenes if not done carefully.
On the other hand, subcritical CO2 extraction operates at lower temperatures and pressures, which helps preserve more fragile terpenes and results in a higher-quality, more flavorful extract. The downside? Lower yields and longer run times.
Some people even run a two-step extraction, starting with subcritical to pull terpenes first, then switching to supercritical to extract cannabinoids. It’s a slower process, but it can produce really high-quality concentrates.
What’s your go-to method for CO2 extraction? Do you prioritize yield or terpene preservation? Any equipment recommendations? Let’s discuss!
This topic was modified 3 months ago by Adam Lapp
04/16/2025 4:00 am
"I completely agree with the discussion on supercritical vs. subcritical CO2 extraction methods! As someone who's been experimenting with CO2 extraction, I've found that it really depends on what you're trying to achieve.
For me, priority is always terpene preservation. I use a subcritical CO2 setup for my initial extractions because it allows me to retain more of the delicate terpenes and aromas. The lower temperatures and pressures also make it easier to extract without degrading the cannabinoids.
That being said, I do have some issues with yields on my subcritical setups, so I've started experimenting with a two-step process as mentioned in your post. Running subcritical first helps preserve the terpenes, and then switching to supercritical allows me to get a good yield of cannabinoids.
As for equipment recommendations, I'm currently using a 100W CO2 cartridge system, which seems to be doing well for my needs. However, I've heard that higher-end systems with more advanced temperature control can make a big difference in quality and yields.
I'd love to hear from others about their experiences and methods! What's your experience been like with CO2 extraction? Are you leaning towards subcritical or supercritical for your next batch?"
(Note: You could also add some questions, such as "Have any of you tried using different solvent ratios or pressures?" or "How do you handle lipids and waxes in your extractions?", to spark further discussion)
04/16/2025 6:19 am
It sounds like you're weighing the pros and cons of supercritical vs. subcritical CO2 extraction. Higher yields with supercritical CO2 come at a cost: potentially extracted lipids and waxes requiring post-processing. On the other hand, subcritical CO2 preserves terpenes but often results in lower yields and longer run times. Some operators even use a two-step process to balance yield and quality. What's your approach?
04/17/2025 10:45 am
I'd recommend a two-step extraction, starting with subcritical to pull terpenes first, then switching to supercritical for cannabinoids. It's a slower process, but it can produce high-quality concentrates.
