A friend of mine, a big grower, and I (a much smaller one) want to move beyond the usual butane extraction of trim to get cannabis oil. We've talked about how CO2 extraction appears to possibly solve all of the main problems of hydrocarbon solvent extraction---mainly the fire danger, scale limitations and solvent cost.
What we need to figure out, perhaps with your help, are the fundamental physical principles of it so that we can fashion a rig for doing it. "Real" setups are obviously way, WAY too expensive to consider (hundreds of thou$ands).
How could this be done by, for example, modifying an old-school water-shooting stainless steel fire extinguisher body and utilizing a common restaurant soft drink CO2 cylinder and valves/fittings? We do have access to the work of metal fabricators, etc.
The properties of CO2 being what they are, I realize that the liquid form has to be contained to greater degree than butane does so that it won't just escape and instantly turn to gas, but I know also that you can't just pressurize a container without risking an overpressure type explosion. So how would it be done? I know it can, because people are starting to do it (CO2-extracted hash oil is starting to show up in dispensaries, and we just know in our bones that these guys didn't use some $200,000 industrial extractor to do it).
Both my friend and I have put in years of dues doing it the old way and we feel we deserve to be among the more well-informed. But web searches, so far, are not turning up the kind of information we need to get going. Can anyone offer anything to get us over the hump? Safety is still #1.
thanks
MM
What we need to figure out, perhaps with your help, are the fundamental physical principles of it so that we can fashion a rig for doing it. "Real" setups are obviously way, WAY too expensive to consider (hundreds of thou$ands).
How could this be done by, for example, modifying an old-school water-shooting stainless steel fire extinguisher body and utilizing a common restaurant soft drink CO2 cylinder and valves/fittings? We do have access to the work of metal fabricators, etc.
The properties of CO2 being what they are, I realize that the liquid form has to be contained to greater degree than butane does so that it won't just escape and instantly turn to gas, but I know also that you can't just pressurize a container without risking an overpressure type explosion. So how would it be done? I know it can, because people are starting to do it (CO2-extracted hash oil is starting to show up in dispensaries, and we just know in our bones that these guys didn't use some $200,000 industrial extractor to do it).
Both my friend and I have put in years of dues doing it the old way and we feel we deserve to be among the more well-informed. But web searches, so far, are not turning up the kind of information we need to get going. Can anyone offer anything to get us over the hump? Safety is still #1.
thanks
MM