wtf is going on in that video? sounds like a bunch of crackheads with no teeth and their place pretty much confirms it!
His other vids are pretty bizarre, too. The strange part is there is some logic to his method, but it is so haphazardly performed I have to wonder if he actually understands the underlying thermodynamic issues.
A key equation in calculating what is going on here is the following:
PV = nRT
Where
P = pressure (in N/m[SUP]2[/SUP] = Pa)
V = volume (m[SUP]3[/SUP])
n = number of moles
R = 8.31 J mol[SUP]-1[/SUP] K[SUP]-1[/SUP]
T = Temperature in Kelvins
From this equation, many thermodynamic properties of materials can be calculated, which leads to the
phases of materials:
This chart is interesting in that it shows the phase relations of both CO2 and Water; however, there is a slight backwards slope for water from the Triple Point, although after a certain Pressure, it behaves more like an ideal gas. So for the purposes of Sub/Super-Critical analysis, it's fine.
The point of this is when one starts adding "modifiers" into the matrix, their relative phase diagrams ALSO need to be considered.
Unfortunately, I am not an Organic Chemist; I don't know what sort of chemical reactions are taking place. But I do know how to calculate the Entropy/Enthalpy of a system along with Gibbs Energy (which leads to chemical potential), and can see there are going to be some strange
interactions between the various
solvents. For example, how much energy is being lost to heating water/ethanol during the pressurization?
And here's another issue that needs to be considered by these "mad scientists":
The supercritical solvent is a rule CO2 and the SFE process usually adopted consists of one separation stage only. This process arrangement revealed to be not suitable to obtain essential oils: it produces concrete like extracts, due to coextraction of cuticular waxes. Moreover, when the SFE has been conducted in non optimized conditions, the simultaneous extraction of some further families of unwanted compounds like fatty acids and their methyl esters has been produced. It has been demonstrated that it is necessary to adopt more complex process schemes to realize a better extraction selectivity [6].
http://gw-chimie.math.unibuc.ro/anunivch/2005-2/AUBCh2005XIV2287290.pdf
So when you see these pics of "green oil" and whatnot, you can bet it is because of these hokey, single-stage setups where a little knowledge can do a lot of damage...
Even though CO2 extraction is a fascinating subject, I wouldn't hold my breath expecting any of these
garage chemists to be doing anything that can be considered
value-added.
They'd be better off sticking to dry-ice and bubble bags... But hey... even I am willing to change my mind if presented with a good demonstration.
So... maybe when oilmkr decides to be more forthright and detailed in his methodology, the subject can be reconsidered more respectfully.
But for now, the only oil I am seeing is
snake-oil.
clean yo house mother fucker