hash oil made with supercritical co2 extraction

[heady blunts]

nothing's finer.

 

[Blue Tail]

Heady Blunts,

Could you possibly post your process and equipment used for Supercirtical CO2 Extraction? A methodology that isn't through-the- roof expensive would be revelatory (for me anyway).

Thanks,

BT

 

[kerlito]

show something

 

[Tokingham]

I am working on a pressure cooker design for the extraction. It is similar to the CO2 d-limonene extraction on YouTube. I am trying to figure out how to make something that rests inside the pressure cooker. I am thinking a Pyrex glass dish on the bottom to catch the goodies. I also though about wrapping the flowers inside a pouch to keep them in place and have dry ice rest above the pouch.

 

[Tokingham]

^^^I forgot to say its the same idea, not same exact set up as the video. This would be for larger scale and to be able to get the oil out if the container it is left inside.

 

[Tokingham]

I am going to try and replicate this idea, but set it up so that I can do larger amounts and have the results be easy to collec

A unique liquid CO2 extraction laboratory developed for a greener organic teaching lab curriculum provides an effective, inexpensive, and convenient procedure for teaching natural products extraction concepts and techniques using modern green extraction technology. The procedure is appropriate for the teaching lab, does not require any special equipment, and allows the students to see the phase change and extraction as they occur. Students learn extraction and spectroscopic analysis skills, are exposed to a dramatic visual example of phase change, and are introduced to commercially successful green chemical processing with CO2.

 

[dope_roor]

interesting, i suppose in theory it could potentially work

whats the cost of dry ice like? how much do you need per g of plant material? any estimated costs as you're not going to be able to recirculate the CO2.

 

[Gray Wolf]

The graph you've posted seems to agree that C02 reaches critical state at 31.1C/88F and 72.9 atmospheres, or about 1086 PSI.

By agreement, pressure cookers vent excess pressure at 15 psi (about ~1 atmosphere), so assuming it has been replaced by a 1100 psi back pressure regulator, what is the burst pressure of the pressure cooker that you are using?

Have you also checked your material selection at the cryogenic temperatures that you are operating at when you release the pressure? Some materials, such as carbon steel, turn into fragmentation grenades at cryogenic temperatures.

 

[Tokingham]

The graph you've posted seems to agree that C02 reaches critical state at 31.1C/88F and 72.9 atmospheres, or about 1086 PSI.

By agreement, pressure cookers vent excess pressure at 15 psi (about ~1 atmosphere), so assuming it has been replaced by a 1100 psi back pressure regulator, what is the burst pressure of the pressure cooker that you are using?

Have you also checked your material selection at the cryogenic temperatures that you are operating at when you release the pressure? Some materials, such as carbon steel, turn into fragmentation grenades at cryogenic temperatures.

1 atm = 14.6959488
Liquid CO2 forms at 5.1 atm or 74.94933888 psi.
(A little data for those looking to try this, use it however you will)

......1086 psi you say?


I guess that means I will need to use a pressure paint pot to hold the extraction. I thought Pressure cookers could hold up to 80 psi but I found they only hold about 15-20psi then fail to work, so no boom, just failure to do anything at all.

 

[foaf]

 

[Vector Mung]

Yeah I love when someone busts a veritable orgasm of poor planning all over a forum. Someone on Jokecity right now has pictures of a supercritical extraction system they're buying piece by piece. He took pics next to his plants. Huge computer looking components, a BPR, a pump, stainless capillary tubing everywhere, a 20 lb. CO2 tank strapped in the corner. On top of one of the dusty old computer shits: a pressure vessel. Its size: like 20 ml. Smaller than a stainless steel baster.

foaf clearly knows what types of vessels are needed for this operation and DIY. Any real man does. But what about your thermocouple? Heating mantle? LOL @ your centrifuge tube design working for weed, that thing is about as airtight as a well-pegged ass. Pressure vessels, foaf. "Mine are basically special and you can't get them." What about some that rock over 200 bar, can you get those with the same ease.

 

[Vector Mung]

LOL. Plans for a grand CO2 extractor based on a loose-capped centrifuge tube that leaks gas so hard that it spins at mad RPM in its water bath. Now, let's talk split ring non-stirred reactors.

They ain't cheap, so people can stop asking the great "heady blunts" for an inexpensive DIY.

 

[Tokingham]

LOL. Plans for a grand CO2 extractor based on a loose-capped centrifuge tube that leaks gas so hard that it spins at mad RPM in its water bath. Now, let's talk split ring non-stirred reactors.

They ain't cheap, so people can stop asking the great "heady blunts" for an inexpensive DIY.

lets talk about over kill. You attempt to discourage me has failed. I will continue but I will take my results to another place than here.

 

[Vector Mung]

LOL @ overkill when all but the one at far left is actually rated for only 200-300 bar. You'd think someone as skilled in extraction as yourself would know that your centrifuge tube design is actually a low-flow liquid CO2 extraction, not supercritical.

 

[Gray Wolf]

1 atm = 14.6959488
Liquid CO2 forms at 5.1 atm or 74.94933888 psi.
(A little data for those looking to try this, use it however you will)

......1086 psi you say?


I guess that means I will need to use a pressure paint pot to hold the extraction. I thought Pressure cookers could hold up to 80 psi but I found they only hold about 15-20psi then fail to work, so no boom, just failure to do anything at all.

Actually about 1071psi, as I mistakenly used 14.9 psi instead of 14.69, if we are indeed talking about super critical fluid extration.

Are you talking about super critical fluid extraction, or liquid C02 extraction?

 

[Vector Mung]

1 atm = 14.6959488
Liquid CO2 forms at 5.1 atm or 74.94933888 psi.
(A little data for those looking to try this, use it however you will)

And there's a little "science" from your ethanol extraction Messiah. Gray Wolf, why would people be keeping their CO2 tanks at 216.592 Kelvin? After all, it's not until that low temperature that saturated carbon dioxide's pressure decreases to 0.51796 MPa (Span and Wagner 1996). At room temperature, everyone knows the pressure is more akin to 5.1 MPa, the figure you have decided to change to ATM / Bar for no good reason. There's a lesson for you, kids: using the royal "we" doesn't make someone know science.

At 298 Kelvin, saturated CO2 will possess a pressure of 6.4121 MPa. The fact that I actually have to explain this suggests, as I initially stated, that I only care about talking to foaf.

tldr; Gray Wolf forgot to multiply by 10. Liquid CO2 is fuck-high pressure too.

 

[gaiusmarius]

so can anyone tell us ignorant non scientists the difference between co2 extraction and super critical co2 extraction? in plain old english. is the super critical referring to doing it under pressure?

 

[Vector Mung]

It's just like it sounds, it's doing it at supercritical pressures and temperatures. Above the critical point for the solvent. You could extract with supercritical Vector gas if you angried it up with enough heat and pressure. The liquid would want to turn to gas but the pressure would force it not to. The result would be a supercritical fluid. Critical point of CO2 is relatively low. Differences between a subcritical and supercritical CO2 extraction would depend on thermophysical properties of any given extraction parameters. Any supercritical extraction will penetrate its target better due to the unique transport/diffusion/viscosity properties of this state of matter.

 

[Gray Wolf]

And there's a little "science" from your ethanol extraction Messiah. Gray Wolf, why would people be keeping their CO2 tanks at 216.592 Kelvin? After all, it's not until that low temperature that saturated carbon dioxide's pressure decreases to 0.51796 MPa (Span and Wagner 1996). At room temperature, everyone knows the pressure is more akin to 5.1 MPa, the figure you have decided to change to ATM / Bar for no good reason. There's a lesson for you, kids: using the royal "we" doesn't make someone know science.

At 298 Kelvin, saturated CO2 will possess a pressure of 6.4121 MPa. The fact that I actually have to explain this suggests, as I initially stated, that I only care about talking to foaf.

tldr; Gray Wolf forgot to multiply by 10. Liquid CO2 is fuck-high pressure too.

Not sure I understand your question brother VG. Could you elaborate?

Actually I didn't forget to multiply by 10. I just reposted Tokinghams numbers so that it was clear that we were talking oranges and apples.

Clearly C02 is not in a critical state at 75 psi.

 

[Gray Wolf]

so can anyone tell us ignorant non scientists the difference between co2 extraction and super critical co2 extraction? in plain old english. is the super critical referring to doing it under pressure?

Both liquid C02 and super critical C02 extraction require pressure. Liquid C02 at atmospheric pressure, is known as dry ice.

At the right pressure and temperature, solvents like C02 become super solvents.

You can extract with the liquid solvents at temperatures and pressures below critical state, it just isn't a super solvent.