BHO is a waxy "Concrete" full of lipids (this is why it's solid at room temp). These lipids are far less soluble in Ethanol (at a low temperature) than in a Hydrocarbon (such as butane)
They can be easily removed by re-dissolving the BHO in Ethanol (or 99% Iso) and placing the liquid in the freezer overnight. This will coagulate the lipids.
i believe butane is more non polar than ethanol and therefore would be more selective to the compounds of interest
Greens are not precipitated from the frozen ethanol iirc.What I wanted to know is why use the butane in the first place? Using a cold ethanol wash on your trim/bud in the first place leaves the fats/waxes behind, so you don't have to precipitate them out later. I assume the answer is that you get a higher yield using the butane, but I wanted to know how big of a difference, if it is worth the extra work. In my experience it is not, so I thought I must be missing something.
Thanks Mr. M, but I think you misunderstood my question. I know that stuff.^^
What I wanted to know is why use the butane in the first place? Using a cold ethanol wash on your trim/bud in the first place leaves the fats/waxes behind, so you don't have to precipitate them out later. I assume the answer is that you get a higher yield using the butane, but I wanted to know how big of a difference, if it is worth the extra work. In my experience it is not, so I thought I must be missing something.
Hi Gray Wolf.
What VM is saying is that you miscalculated the pressure at which CO2 is liquid at ambient temperature. He is right. You used the wrong conversion factor. He points out that your vessel would have to be at -70 deg F for the CO2 to be liquid at 75psi, and need to have a pressure of over 900psi at 77deg F for CO2 to be liquid.
The hash oil "Absolute" that I make is so much finer than most other types of oil I have had in my life that I doubt I will ever go back to BHO.
Interesting notes, Mr. Mountain. I too have dabbled in the realm of absolutes. I do find that properly made absolutes are incredibly smooth, but all of what I have considered to be properly purged came out glassy shatter, or maybe a bit tacky at best like fruit leather.I find absolutes (properly made) will almost never be solid, only viscus liquids and have a more "golden" color and generally taste better.
Thanks Mr. M, but I think you misunderstood my question. I know that stuff.^^
What I wanted to know is why use the butane in the first place? Using a cold ethanol wash on your trim/bud in the first place leaves the fats/waxes behind, so you don't have to precipitate them out later. I assume the answer is that you get a higher yield using the butane, but I wanted to know how big of a difference, if it is worth the extra work. In my experience it is not, so I thought I must be missing something.
I did some research on SCFE extraction and designed a front end system that uses liquid C02 to eliminate the pumps and refrigeration required and operates at 1500 psi.
Given that the meds that we seek are in the surface trichomes, vis a vis buried deep within the plant structure, is super critical state even necessary? Why do we need a super solvent?
As we previously discussed in this thread and for which the curves have been posted, C02 is liquid below the super critical point, so can we actually achieve an extraction at anywhere on the curve where the C02 is still in a liquid state?
Did this research include the oft-referenced, rarely read patents on the subject? They seem to be sound sources of information. Large flows of CO2 are prominent.
http://www.google.com/patents?id=kraGAAAAEBAJ
http://www.google.com/patents?id=1N2oAAAAEBAJ
I'm confused, people say that the guy who got banned is some massive troll spewing false information, but his posts saying what was needed to make your own supercritical CO2 came three months before one of the detractors posted a link to someone using that very technology to make the first videotaped private supercritical CO2 experiments.
Also I find GO Joe's story about "The Unfortunate M" to be extremely misleading. Why do you provide false information in order to get people to believe you? M. was NOT his middle name, as you suggest, nor was his nickname "The Unfortunate". It was his first initial. There is NOTHING in the Paris explosion to impugn CO2 extraction. It was a CAST IRON vessel. He was filling it by POURING SULFURIC ACID onto BAKING SODA in another vessel, CREATING CO2 and filling a CAST IRON vessel with NO PRESSURE RELEASE SAFETY from a source that had no control on the rate of reaction. Why do you leave all of these things out? After the explosion the pressure safety burst disc was invented. This has NEVER happened again, and is where we get this safety device from. Don't quote a story that should ENCOURAGE people as if it should DISCOURAGE them.