The EnJYN (At Home CO2 Extractor)

**Disclaimer: EVERYTHING about this process is dangerous, period. The purchaser assumes ALL liability for safety. There is a lot that can go wrong with this process. Especially if care is not taken with each step and respect is not given to the hazards of liquefied gas in pressure vessels.**

Low Pressure System In Action Below:

This is my technique for an AT HOME supercritical CO2 extraction system.

Rosemary Oil

 High Pressure Transfer Assembly That Comes With The High Pressure Tank


  1. I have an Idea i would like to run by you. Put everclear in the collection tank before you start and fill the whole system with a third tank. this way you can keep most of the co2 for future as the oil will be dissolved in the alcohol. I think this would also help keep dissolved oils from the collection tank from returning to the extraction tank. maybe even using some smaller 20oz paintball tanks for extraction and collection. Any comments or suggestions are appreciated.

  2. after the extraction is finished transfer as much of the co2 from the collection tank to the original tank as possible. first transfer from extraction tank to collection tank and then to the clean original tank. repeat process. this way you can recycle most of the co2.

  3. Those are some great ideas, and thank you for commenting!

    Concerning a reclaiming system, I have one designed using a three-way valve so that all of the tanks can be connected at the same time with two hoses. Consider that maybe instead of so many disconnects. You have the right idea on how to go about reclaiming the co2.

    When I clean my collection tank with everclear and some is left behind I end up with a perfect puddle of oil/ethanol in the bottom. So it does make it a little neater. As far as it aiding in retaining oils during expression or reclaiming of the co2, that seems sensible to me. As the gas is released and the pressure drops the co2 holds less and less oil in solution leaving it for the ethanol to pick up. Maybe some agitation during the venting would aid in this.

    However, as long as the collection chamber is properly cooled to send it below supercritical ranges, the escaping molecules of gaseous co2 should not be able to hold the oils in solution. Even when heat would be necessary as in the case of reclaiming co2, the system should not be allowed to reach supercritical pressure, once the pressure rises in the warmer cylinder the gas will escape to the cooler and lower pressure reclaiming cylinder. I don't know enough to affirm whether or not the ethanol would actually aid in retaining oils while transferring the co2. The co2 should not be carrying the oils as long as care is taken, in my mind anyways. Maybe someone else can chime in.

    Paintball tanks are a good idea, many can be found up to 5000psi for compressed air. I haven't looked into whether or not the materials are suitable in those for liquid co2. The smaller co2 paintball tanks go up to 3000psi so even they will give a step up in solubility, which is what I'm getting at. Since they are smaller they can not hold the same mass of co2, which is ok if the the solvency of the co2 is high enough to still collect an acceptable amount of oils. 5000psi may be the better choice if they are co2 compatible because you can dissolve more oils at higher pressures. One other thing on paintball tanks, I believe they have some spring pin valve on the tip making them harder to find parts that will allow transfer of the co2. They need a screw down pin on whatever connection you use. Do not let my negativity stop you, it seems like some have had success using paintball canisters. I am not sure how much plant they were processing, or how good the end results were.

    A scientist by the last name of Perrotin wrote a good research paper on solubility across various temperatures and pressures. This is a good start on weighing the pressure capability vs capacity of a cylinder.

    I hope I answered your questions, I tend to ramble - JY



  4. cool thanks a lot. I am an engineer and welder. when I get co2 I own the tanks but I exchange the empty ones for full ones. with a third tank You would only exchange the one tank while keeping your extraction and collection tanks.

    I think I might do some experiments with paintball tanks to see if there is a difference between using alcohol in the collection tank. If you try it please post.

    Another thought, I saw how you mentioned the use of a vac-chamber. It seems to me to be a great Idea in fact when I started ordering equipment to build my system I ordered a vac chamber. It should boil off the alcohol pretty quickly and completely.

    Keep up with the blog you are the only person i found that seems to know what they are doing with extractions. It is great to have someone to bounce ideas off of. Your blog inspired me to buy my own system.

  5. That is awesome! I wanted to make it known that co2 extractions are easily achievable in the home. Especially with all of the negativity surrounding hydrocarbons. I am glad you decided to take a chance on it.

    I am going to make a vacuum chamber out of a pyrex dish, and the whole thing should cost less than $50 (and hopefully less than that) to make not including the pump. I will post a full write-up with pictures when I am done. Obviously it won't be meant for strong vacuum situations but should be fine for my needs.

    Thanks again for commenting on here and I look forward to bouncing ideas around as well.

    I will throw some everclear in my collection tank soon. Good luck with the paintball tanks. - JY

  6. if you want to go really cheep on the vac chamber check out the pump and seal I have one. It is great for vacuum sealing mason jars. It might work for small amounts.

    I have ordered all the equipment for my system including 3 20# tanks, 2 20oz tanks(for experiments and small runs), a commercial vac unit, and generally what you used to make your kit. I will post when I get everything together.

    I think your kit will work very well especially for people that have little experience with this sort of thing. If you put a nice box around it and some automatic controls you could sell it for $18,000

  7. Have you studied the issue of decarboxylation. I was thinking that after the extraction is complete you could let most of the co2 out of the collection tank. you would may also have alcohol in the collection tank. At this point you would heat the tank. there would be little danger heating the tank to 200 F or more because you would have let most of the co2 out already. You would heat the tank at a specific temp for a specific time period (Many different views on how long and how hot). Once the extraction is decarboxylated, you would let it cool and evacuate the co2. Then the extraction should be very high in delta-9. The theory is by doing the decarboxylation under pressure with co2 and dissolved in alcohol there would be little chance of oxidation and degradation from the process. Do you have any comments on the matter?

  8. Thank you for the compliment on my kit. It is developing and I will be able to put out the appropriate media for all of my systems soon.

    I drown myself constantly with new projects and my butane extraction systems have stirred up the most interest consumer wise. I am working on a large capacity reclaiming system for a Canadian customer currently.

    I have decarboxylated a lot for tinctures. The cylinder could certainly be heated up to accomplish this. I would feel safer warming the vacuum chamber up if it is possible, however. This would also require less energy. The mason jar vacuum would be great for the votive holders I use to hold my oil. I would place the oil after most of the ethanol is purged in a small glass dish like my little candle holder. Then place that in the mason jar, put the jar in a pot of water on a warmer. Warm the water as hot as you are comfortable with and place the jar under vacuum. As the oil decarboxylates it will release carbon dioxide so additional suction will be necessary to maintain the vacuum. The only gas that should be in the jar in large amounts is carbon dioxide.

    Truthfully I never could get into the edibles bit. Too much required for effect and never the same bang. However, there is an interesting article on an actual methods to turn your favorite essential oils into their esters making them water soluble. In the process they are decarboxylated using chemicals. Care would have to be taken to prepare this and would put you in the realm of yucky chemicals again. But, I have sourced all of the precursors necessary so it is definitely doable. Oh and the point would be you could place the product under your tongue, mix it in you favorite kool-aid flavor, etc. It makes the oils MANY MANY times more bio available and likely would change their experience and or effects substantially. Anyways, interesting article. Google your favorite essential oil and hemisuccinate if you are interested....

    I am excited for you and your system and wish you success. It is nice to hear my thermostat relay clicking off and on in the distance to heat up my next batch of co2 extract! I can taste it now. - JY

  9. @extractor1

    Ever since Graywolf from Skunkpharm put me on to transferring the co2 as a supercritical fluid, I have created a need for a more intense heat source to provide energy for faster fluid transfers. The smaller heating pad I have is having a hard time keeping up with the refrigeration from the transfer. A larger one 500w works better with my 20# cylinders but I sometimes feel that the heating pad is susceptible to error and overheating. Looking into affordable alternatives I have found several tankless water heater options to cycle water and keep it warm in a small bucket making it easier for the heating system to provide the desired temperatures. One option is a tankless that is propane heated and the other that I felt reasonable is a 120V system. Both could be hooked up outside to a garden hose to provide pressure but that would leave the issue of recycling the water. They are both about $140 and would allow much warmer temps than say aquarium heaters designed for sensitive livestock. I think a water pump that can handle warm water would work best for re-circulation. A small cost however, because low flow is all that would be needed.

    Warm water transfers heat much more quickly and consistently to the cylinder than a heating pad. I have noticed that the pressurizing happens MUCH quicker with warm water. I'm pretty sure due to its higher specific heat and ability to hold thermal energy.

    What do you think of this option for providing heat for extraction as well as solvent transfer?

  10. Im going to be buying your 4500psi system. I was wondering if you could make it a recapture system and how much additional it would cost.

    Thanks, andrew

  11. Hi Andrew, I get excited when I see comments on my blog!

    I do build reclaim systems and in fact have submitted patent applications.However, they are considerably more expensive and look nothing like the system you see above you.

    These at-home systems are designed to get the most oil from each run because the CO2 is NOT reclaimed. That is the reason for high pressures like 4500PSI, more solubility and so more savings with CO2.

    Reclaiming with relative low expense can be accomplished with some labor as well as the right temperature application. The reclaiming vessel would be chilled in a bath of, well essentially radiator fluid, and dry ice. The sending container would be warmed gently and kept below supercritical pressure. Sadly, this is not cost effective. Because of the nature of carbon dioxide, high vapor pressures for one thing, the expense is high in closed loop systems.

    If you are interested in larger scale closed loop systems let me know. If you have any questions, about any of my systems email me

  12. I love this system! It is exactly what I have been looking for! I will be purchasing the 4500 psi system and I cant tell you how excited I am to start doing co2 sfe at home. I have been researching this for quite some time now and your system is both legitimate and cost effective. I have used butane for years, along with every configuration of dry ice, and I am moving away from hydrocarbons for good now, thanks to your design. I also like that I wont have to winterize, unless an absolute is the goal. Keep up the good work!

  13. I do have a few questions about the system and capacaties, for example, how much dried material are your filling the extraction chamber with? What is the max? Can I use a larger extraction vessel? Perhaps as large as the supply tank? Have you tried ethanol in the collection chamber yet? I have used ethanol at 2% in a scuba tank with dry ice and had some pretty great results at 115f.

  14. Hi Adam, thanks for the comment and compliments. The 4L high pressure tanks can be filled with quite a bit of material but I think 16oz or less is good for efficiency. I do as little as 2oz at a time of flowers.

    Larger tanks are possible but they require a higher wattage of heating power and are much more cumbersome. I have used 13L tanks and they work great as far as getting more oil per run, just not the most ideal for working with in this manner. I do believe larger systems should be stationary with a removable collection container.

    I have used alcohol before, but in my experience it lowers the total vapor pressure of the solution so much that I need more heat to achieve decent pressures. One solution to that is fill the extraction volume very full with CO2 using ice water and a lot of heat on the storage container. Truthfully I have not done much experimenting with cosolvents beyond the alcohol a few times.

  15. Hello! do you sell these kits and for how much?

  16. If I have a terpinator mkiii with the recovery and vacuum pump can I also convert to co2?

  17. Hi Nick, no because butane has a much lower vapor pressure than carbon dioxide and the Terpinator is not designed to withstand it.