Co2 Extracted Concentrait.

morfin56 said:

Im sorry, I was drunk earlier and (was being a smart ass) added instead of subtracted which led to the wrong temperature.
Anyways someone (like me) will put dry ice in a metal container that is not nearly strong enough and heat it up a little resulting in an explosion.
My explanation for Co2 canisters not exploding in pockets?
They are only like 37% liquid and the rest gas, also made of high grade aluminum,
Not only that but they certain rupture points to vent in the case of high temps increasing pressure to much.
If you put dry ice into a less then ideal container, which someone might try, it will explode.
Only thing is I've done it on purpose, and if someone were next to that they would have been blown to pieces.

Sorry for being a dick.

Click to expand...

Thanks man... Hope you know my rudeness was strictly superficial, I hate being an ass (but you have to stand up for yourself/others once in a while, otherwise you come off as a pushover).

I looked into the working and burst pressures of the pipes I was speculating about using, they are within technically safe limits for the pressures we would be working with using Co2.

Keep in mind that we are talking about using dry ice "nuggets" (as they are sold locally to me) so it would be nearly impossible to fill the entire volume of your pipe with solid Co2 (at the most 75% assuming they were perfect identical spheres) .. Its kind of like filling a pipe with marbles, there will be plenty of gas space (voids) left inside (like your Co2 cartridge). Besides I never advocated filling the pipe more than 1/2-2/3 full of dry ice nuggets as the density of unconfined dry ice is about 2-3 times that of liquid at the temperatures and pressures we have discussed, meaning the liquid it should take up around twice the volume @ 1100psi and 90F if I'm not mistaken. As long as your vessel is less than half fill of solid Co2 (or 3/4 full of nuggets) you should have sufficient space to avoid pressure issues as the solid converts to a gas.

I have advocated using the "burst disks" from Co2 tanks for safety purposes, they have a failure point between 2500-3000psi which is high but only around twice the working pressure and half the burst pressure of the pipe I suggested using to make your vessel...

I'm not advocating to anyone to do anything on blind faith in my word.. Only offering the information needed to begin their own independent research/development.. Always double check the specifications of your components (then triple check)..

I think the biggest concern would be that the unconfined density of dry ice is around 1.562 g/mL.
At the critical point of Co2: 31.3C (88.34F) @ 72.8 bar (1056psi) density is 0.467g/ml (about 1/3 as much as dry ice).
As pressure increases so does density however as temperature increases density lowers (making volume and temperature key considerations)
If you don't account for the space necessary to accommodate the volume of liquid Co2 (at temperature) your pressures could rise exponentially leading to containment failure.

Hope you didn't wake up with a hangover, and that you are having a good weekend...
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looks like at around 1300psi & 100c (212F) Co2 will have a density around 0.2g/ml
At around the same pressures but 32c (90F) Co2 will have a density around 0.7g/ml

looks like at around 1100psi & 100c (212F)Co2 density will be around 0.15g/ml
At around the same pressures but 32c (90F) Co2 will have a density around 0.6g/ml

Using those figures as guides you can figure out how much dry ice is safe to put into your pressure vessel..

For instance if you used a 4" sch 40 pipe 6 foot long it would have a volume of around 900 cubic inches (about 14750 cubic centimeters). If you wanted to heat it to 100C @ 1100psi you could only fit in 0.15 grams dry ice per cc/ml giving you about 2,200 grams (about 4.75lbs) of dry ice..

However, using the same chamber If you wanted to heat it to 32C @ 1300psi you could only fit in 0.7 grams dry ice per cc/ml giving you 10,000 grams (about 22lbs) of dry ice. This is in the ballpark of my last idea before considering phase change systems, however one could be built around this vessel as a condenser/high pressure reservoir. Obviously you would need a compressor and evaporator/catch container for your extracts (the rest is just pluming, gauges and valves).

By the way, brake lines and fittings are made to handle these kinds of pressures (double flare everything for good measure).

These are all estimates and best guesses... I would still recommend doing more research and adding Co2 tank burst disks, not to mention every bit of care/caution you can muster if you plan to try this.



The second drawing depicts a setup that allows you to continually recycle your Co2 by diverting it into a second extraction chamber while refilling the first (such a system would not need the addition of dry ice with every batch of trim)...

Remember when you were a kid and people said "anything is possible" then you grew up disappointed because you couldn't just do whatever you wanted...

The world didn't change (other than the progress of time), your perspective did...

There's a "right" (meaning legal/safe) way to do anything... Anything as log as you aren't hurting anybody (just be creative/resourceful)..

You know the saddest thing about that Waco Texas incident is that it was all over a couple permits (taxes) that he didn't file for.... That is no shit, we (our government, the "people" who represent "us") were there because we believed they had "unregistered" weapons biased on a sound heard coming from their property.... That's the impression I got anyway.. The thing is, even if he (David Koresh) were a convicted felon he could have machine guns there if he "incorporated" his "church" and filed for the permits that way.

We live in a very free country... But uncle Sam takes his tribute (Taxes) very seriously Unless you're a corporation ofcourse... Think of the moonshiners on TV, that's about taxes too, and we used an unavailable Tax stamp to keep marijuana "outlawed" so to speak. Al Capone was taken down over taxes (that was the worst he did in our eyes)... If we just started issuing the stupid pot stamp it would be beneficial all around.. Think of the tribute..... Think of the freedom...

The biggest difference between organized government and organized crime is simply a matter of who is making the laws... Gang leaders are technically political revolutionary's if you think about it, why do you think we pursue them with such interest (we don't want to destabilize the current government).. Currently speaking "we" make the laws (or elect the people who do).. So we have say in things like corporate freedoms and responsibility as well as things like taxes and reasonable law enforcement.

Sorry about the rant, I'm a little stoned.....

my first rig was a oxygen vessel rated at 2100 psi, and unknown cf probably about2.5 lbs tank or 10cf. I always liked the gauge for reliability, and ease of use coupled w an digital thermometer. then i thought saftey and compromised a gauge for a burst disk and i knew it was gunna blew, so all i could do was recover what was still being exshausted from the burst disk. but rather than speed up production, i prefer to just throw it in a large trash can, pool, or washing machine, if you really wanted protection, one could burry it in the ground and wait? jk no i havent the foggiest how to get the 2% mole, since all my scientific research was tainted from the begining with my american scientific scale. yes thats right, gallons, pounds, and ounces, psi, etc. vs liters, grams, kilos, bar, etc. so if you want it in english, its your lucky day as im fluent in american. but if you want scientific explanations, you asked king of backyarders. idk about alot of formulas you write about, but the math is law, and dont lie. so i got some new vessels today w gauge and ruture disks. best of both worlds. i even got a soxhlet extractor, and two supply vessels rated at 6,000 psi near 480 bar. now thats some pressure w needle valves up to 30,000 psi smooth as sin.s so heres some numbers for you. 3,500 kg #5 co2 tank 1800 psi max, 7 lbs of crushed dry ice was put into the vessel. at 70F degrees, what would your absolute pressure be? what would your gauge pressure be? co2 has 44.01 g mole and a vapor pressure of 846psi i do believe. can you shoot me the answer? i want to know. thanks.

so my personal w-4 is of interest to you? fuck you if your getting anymore formulas that work from me again. figure that shit on your own, or search back onmy posts and try from their. thank you for not buying technical info from me as i now am not giving that shit away anymore. good luck in the dark w no real starting point.