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Passive Butane Extraction and Recovery

Lu lu lu lu lu lu lu lu lu lu!!!!!!!!!!!!!!

All ya'll that have been watching our Passive Butane Extraction and Recovery thread,  at: /passive-butane-extractor-and-reclaimer/ here is some exciting breaking news! I just learned that Glacier Tank has some 6″ diameter X 6″ long sanitary spools due in this month, which you could make a tank out of just by using another end plate and a clamp for the bottom. The only welding would be for the plumbing fittings. Hee, hee, hee, snicker, snark, snort!!!!!!!!!! GW

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  1. Robert G

    What is the consistency of the absolute in the picture above? I've most recently been using a box fan w/an a/c filter on the intake to purge as much of the ethanol as possible after the 48 hour soak, by placing my open topped Pyrex in front of the fan on full speed. I don't get any foreign items in the oil, as the filter is obviously effective in catching any visible contaminates & the air flow keeps anything on the other side of the fan from falling into the dish. This has saved me the headache of changing the vacuum oil out, at all, during the entire oven purge. Also, bubbles have been limited to very few in # @ 115 & my sea level adjusted vacuum level. I feel as if the purge would be complete in 30 mins. This time I came out with hard shatter in the amount of time I would have yielded goo, had I not used the fan purge. Which brings me to my point: I feel as though I've lost flavor & aroma w/the hard shatter vs. the goo. It may be that I had shatter long before I removed it from the oven, but I wanted to find out which you prefer if everything is done properly. Best Regards, Robert

    Reply
    1. skunkpharmresearch

      The absolute in the picture is shatter and flint hard. I had to warm it to scrape it up. Some monoterpenes are lost with winterizing, as they leave with the alcohol whether you use heat or vacuum. It is a trade, as some of them smell and maybe even taste good, but add harshness to the oil when vaporized. Using a fan works well when the humidity is low, but alcohol is hygroscopic and on a high humidity day, you may end up with a lot of water in the alcohol, and a light tan watery solution toward the end.

      Reply
      1. Robert G

        Ah, I see. That would not be good. Luckily, I'm in Colorado. Not much humidity to speak of, but I will keep an eye on it. What humidity level would be a show stopper? I imagine on most days, I'd be fine outdoors. But, if there's a more preferable method, lmk! I also make kava and kratom tinctures, & I use a still to remove the ethanol from those... I'm considering selling it and just getting a cold trap. Do you guys endorse, or have you begun selling, a cold trap such as the one you designed? $500 sounds a lot better than $3500. One more question: Approximately, what amount of time would you say it takes in the oven @ 115 w/vac, considering the ethanol is nearly dissolved at the start? Thank you so much for the info! There are many people enjoying much higher quality, and healthier, medicine because of the time you guys have so generously put into spreading the truth. Best Regards, Robert G

        Reply
        1. skunkpharmresearch

          Probably below 50%. Still playing with our cold trap design but will publish more build information after I have run it longer and tweaked the operating parameters. Cold boiling is slooow. It takes all day to pump off a quart.

          Reply
  2. jesse

    hey guys hope all is well. so people are finding that there is a "mystery oil" in canned butane(possibly a lubricant for the lighters its meant for?) my question is if activated carbon would remove it

    Reply
    1. skunkpharmresearch

      My guess is the mystery oil is Pentane, the closest heavier fraction to butane, that would be a liquid at ambient. The other two fractions present in butane are propane and isobutane, but they wouldn't be a liquid at ambient temperatures. Pentane does a pristine extraction, is easily purged, and of low toxicity. All of the simple alkanes are single bonded carbon atoms, with the remaining bonds filled with hydrogen, including the longer chain alkanes used for lubricating oil. Why anyone would have to add a lubricating oil for the "valve" is the pregnant question, because it not only isn't required using butane, it would not feed well through the small orifices of a butane lighter and would produce poor flame characteristics.

      Reply
      1. Dave

        How would one go about removing the Pentane? A few people are saying that this mystery oil might make open blasting a thing of the past... thoughts?

        Reply
        1. skunkpharmresearch

          We like to purge at 115F and -29.5" Hg. As a tongue in cheek thought, it is certainly one more good reason to use a closed system, but that conjecture before the mystery oil is identified would be premature. It is certainly of concern until it is, but it could easily be things that we already know are in butane, such as oleaginous waxes and sulfur compounds at low levels, which are being concentrated.

          Reply
  3. Chris

    If a column is loaded with frozen material and the extractor is reassembled and then drawn into a vacuum, doesn't the frozen material thaw out? I recently put some dry trim in an open container and put it into the refrigerator rather than using the oven. It seems to have dehydrated the trim nicely. Is this an acceptable technique or is the trim being damaged in some way? I have been getting excellent test results on my oil and owe it to Skunk Pharms! Thank you

    Reply
    1. skunkpharmresearch

      Thanks for the good thoughts Chris! Yes, frozen material thaws out in a column, but the injected butane is close to freezing temperatures, so it still stays cold. It refreezes again during final vacuum recovery. Freezing to tie up the water is an acceptable technique, and one which we use with fresh cut material.

      Reply
  4. skunkpharmresearch

    It means that not everything was volatilized. Periodically you should heat your nail to glowing red to turn all remaining organic compounds to CO2 and water vapor, like you do in a self cleaning oven at about 700F. I lightly brush off the light gray ash that forms during use, but never clean my nail, skillet, or wand beyond that super heat and self clean.

    Reply
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