Has anyone dialed in an RPM/lb of biomass optimal ratio?
Bench scale testing maybe? Amazon.com
yes, you ARE. you are extracting straight into oil.
because they want a higher concentration tincture?
for oil? not I
the correct metric is not RPM/lb
its g-force.
although I have played with that juicer…
The other big advantage that @sdog21 has, is a lack of explosive vapor and associated head aches. Oil based extraction is probably the safest solvent based extraction.
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If you’re looking for more potency… The solubility of mct is deff higher than 15mg/ml. What I would do is this.
- Decarb your flower at 230f for one hour
- Place your flower in some sort of bubble bag that will fit in your instanpot and still be able to be fully submerged in oil
- Set your instantpot on what ever setting it has to achieve a liquid carrier oil temperature of around 160f
- Agitate everyonce in a while for several hours.
- take the bubble bag out of the pot and add another one filled with new decarbed material.
- Start a timer for your several hour steep.
- Squeeze the shit out of that bubble bag or spin it in a panda
- Repeat as needed until it’s potent enough. You will eventually run out of carrier however b.c. you’ll always lose some inside of that flower so I’d say dunk until you can’t fully submerge the next bag or something.
Long story short if you keep reusing the same initial volume of carrier and using new decarbed flower you can increase your potency.
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yep. seems like the right tech for (many) home users to me…
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This is what we’re spinning bags at, and we’re still leaving 1-2gal in the biomass:
Edit: Radius should have been 2 feet, put in the diameter by mistake. See below post for correct numbers.
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Awesome response ky_cbd, @Sdog21 “panda” is a cheap amazon “centrifuge” that people use for reclamation.
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Spinng bags with etOH or MCT in them? Interesting data
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2600G sounds awesome, but something isn’t right…
how long are you spinning for?
do you really have only 70lb of cannabis in an 8ft diameter rotor?
I can fit 30lb in a rotor only 24" across.
in a 16" rotor at ~1000G I was seeing 1-1.5lb of ethanol in 10lb of biomass. which is not inconsistent with your numbers (density of ethanol 6.8lb/gal). when we hit 1.5lb, it was time to clean the filters.
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Ethanol
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derp, let me update that. should be 2 ft radius not 4
Edit: Spin time is 15 mins. Attempts at going longer yielded minimal <100ml of additional tincture.
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Yep. 1300G same as a panda.
Which is why our numbers are consistent with each other.
And why I tend to turn things up to at least 11 at every opportunity 
I did run a tiny fuge that might have been spinning harder, but never bothered calculating my solvent losses in that one.
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at $20 gal, our financial loss $1000-2000 a day in ethanol. That number sucks, but it does open up funding for improvement.
Comes with a VFD?
10HP motor?
Rated for 100kg?
You got a mezzanine you can observe from?
Try feeding it 75hz…or 90.
Ours came with a Siemens control panel with agitate and multiple spin settings. fairly nice rig for the money.
Run it like you stole it.
Open the box and explain to it you want to go faster!
Observe from a safe distance.
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Nice! thanks for all the responses.
I’m currently using a noodle press for reclamation. It works really well, leaves behind these cool looking cake discs of biomass. There is still loss though. for a 150ml batch, i get about 130ml back.
I like the idea of a centrifuge… I had not thought of that, will have to look into it.
For higher concentrations, I can add more biomass to the same amount of oil. But yes… at a point, you become limited to how much you can fit, in which case I agree the solvent extraction method would be better. right now seems I can comfortably fit about 28-30 grams into 150ml of oil. I could probably go as high as 36-38g. My current problem is my 17.5% biomass ended up testing to about 10%cbd. This will work well for 15mg/ml solutions, but not so much for 30mg/ml solutions… Im receiving some new biomass that should be a higher cbd concentration. Hopefully this one will be good for targeting a 30mg/ml solution. I like @ky_cbd idea about repeating the steps with the same oil, but like you point out, you lose oil each time.
Ultimately, I’d like to develop a process using simple oil extraction to have a 15 mg/ml and a 30mg/ml product.
Does anyone have data on “extraction efficiency” of different carrier oils and their maximum solubility?
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I’d skip the decarb and go straight into oil. Cook for 60min, possibly a little longer based on 3rd party test results.
It should improve the taste, retain more of the terps, and simplify your process.
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Interesting, and it would still convert enough cbdA to cbd?