Sr. Verde's: Concentrate Corner

Originally Posted by Matt Rize

Butane solubility listed with both pressure and temperature because both affect solubility.
Miscellaneous
Solubility in water (1.013 bar and 20 °C (68 °F)) : 0.0325 vol/vol

http://encyclopedia.airliquide.com/E...ia.asp?GasID=8

And:
Solubility of Hydrocarbons in Physical Solvents
"This paper compares the solubility of hydrocarbons in several physical solvents such as ethylene glycol, diethylene glycol, triethylene glycol, methanol, and dimethyl ethers of polyethylene glycol (DEPG, a solvent marketed by Union Carbide, UOP, and Coastal). Most of these solvents are designed to extract unwanted components such as water and acid gases. However, these solvents also have a tendency to remove the hydrocarbon product. Quantifying this amount of absorption is critical in order to minimize hydrocarbon losses or to optimize hydrocarbon recovery depending on the objective of the process. The influence of several parameters on hydrocarbon solubility including temperature, pressure and solvent water content is examined. Suggested operating parameters to achieve hydrocarbon absorption objectives are included. Hydrocarbon solubility is a major factor when considering the use of a physical solvent."
http://www.bre.com/portals/0/technic...20Solvents.pdf

And just to get nerdier. Why would temp (energy) affect the van der Waals force?

"Cohesive Energy Density

From the heat of vaporization, in calories per cubic centimeter of liquid, we can derive the cohesive energy density (c) by the following expression

where:

c=Cohesive energy density

Δh=Heat of vaporization

r=Gas constant

t=Temperature

Vm = Molar volume

In other words, the cohesive energy density of a liquid is a numerical value that indicates the energy of vaporization in calories per cubic centimeter, and is a direct reflection of the degree of van der Waals forces holding the molecules of the liquid together.

Interestingly, this correlation between vaporization and van der Waals forces also translates into a correlation between vaporization and solubility behavior. This is because the same intermolecular attractive forces have to be overcome to vaporize a liquid as to dissolve it. This can be understood by considering what happens when two liquids are mixed: the molecules of each liquid are physically separated by the molecules of the other liquid, similar to the separations that happen during vaporization. The same intermolecular van der Waals forces must be overcome in both cases.

Since the solubility of two materials is only possible when their intermolecular attractive forces are similar, one might also expect that materials with similar cohesive energy density values would be miscible. This is in fact what happens.

Solubility Parameter

In 1936 Joel H. Hildebrand (who laid the foundation for solubility theory in his classic work on the solubility of nonelectrolytes in 1916) proposed the square root of the cohesive energy density as a numerical value indicating the solvency behavior of a specific solvent.



It was not until the third edition of his book in 1950 that the term "solubility parameter" was proposed for this value and the quantity represented by the symbol ∂. Subsequent authors have proposed that the term hildebrands be adopted for solubility parameter units, in order to recognize the tremendous contribution that Dr. Hildebrand has made to solubility theory."
http://cool.conservation-us.org/cool...3/bp03-04.html

Now I just don't know, I'm too high for all this. lol

kept reading:

"Temperature, concentration, viscosity

The solubility window of a polymer has a specific size, shape, and placement on the Teas graph depending on the polarity and molecular weight of the polymer, and the temperature and concentration at which the measurements are made. Most published solubility data are derived from 10% concentrations at room temperature.

Heat has the effect of increasing the size of the solubility window, due to an increase in the disorder (entropy) of the system. The more disordered a system is (increased entropy), the less it matters how dissimilar the solubility parameters of the components are. Since entropy also relates to the number of elements in a system (more elements=more disorder), polymer grades of lower molecular weight (many small molecules) will have larger solubility windows than polymer grades of higher molecular weight (fewer large molecules)."

Solubility, solvency and and polarity are not the same thing. cn

Originally Posted by cannabineer

Solubility, solvency and and polarity are not the same thing. cn

Yes, but they are all related intimately.

I get a call from Ms Kitty this morning, she finds 4 ounces of bubble hash in some old jars that we must have lost and not even noticed..... Bad time to be out of town, I want to go make it into oil!

When putting this in a tube, to "convert" to honey oil, is there anything I should watch out for or do differently? I planned to just add it to the tube when I ran the half pound of endless sky popcorn nugs......... (I never sell popcorn, always sell colas)........

I would mix the bubble with nugget.. So the bubble doesn't gunk up your tube..

Btw how was endless sky to grow? I've been looking at that strain for years

Originally Posted by Matt Rize

Yes, but they are all related intimately.

I've been poking around online, and I cannot find anything one way or another about polarity and temperature in pure liquid phases. What I did find was a suggestion that the dielectric constant of a liquid is dependent on temperature. If that is so, then my entire argument was predicated on a false idea: that the dielectric constant is, well, constant.
I do wish i could find an experieental graph for dielectric constant v. teperature in a liquid alkane hydrocarbon ... my suspicion is that it's pretty flat. For highly polar solvents, like acetone, alcohols etc. ... I can easily see a steeper slope. In any case, please accept this as a concession. cn

Originally Posted by researchkitty

I get a call from Ms Kitty this morning, she finds 4 ounces of bubble hash in some old jars that we must have lost and not even noticed..... Bad time to be out of town, I want to go make it into oil!

When putting this in a tube, to "convert" to honey oil, is there anything I should watch out for or do differently? I planned to just add it to the tube when I ran the half pound of endless sky popcorn nugs......... (I never sell popcorn, always sell colas)........

Since it's old and might have lost some punch, i would extract it separately and evaluate. I would add some filler/filtering aid, either diatomaceous earth or shredded toilet paper, then flush.
Best oil-style extract I ever made was doing a cold pentane solution of some high-quality bubble, and allowing the particualtes to simply settle, then cold vacuum removal of the pentane. cn

Originally Posted by cannabineer

I've been poking around online, and I cannot find anything one way or another about polarity and temperature in pure liquid phases. What I did find was a suggestion that the dielectric constant of a liquid is dependent on temperature. If that is so, then my entire argument was predicated on a false idea: that the dielectric constant is, well, constant.
I do wish i could find an experieental graph for dielectric constant v. teperature in a liquid alkane hydrocarbon ... my suspicion is that it's pretty flat. For highly polar solvents, like acetone, alcohols etc. ... I can easily see a steeper slope. In any case, please accept this as a concession. cn

you're my favorite! make me think about stuff, and last night i stumbled on some gold that explains somethings about why my hash looks the way it does. so thank you for not taking my word as truth. research!

Originally Posted by Sr. Verde

I would mix the bubble with nugget.. So the bubble doesn't gunk up your tube..

Btw how was endless sky to grow? I've been looking at that strain for years

Thanks!

Endless Sky is very nice. 1200ppm max mid flower, 900ppm when you begin flower, 56 days later you've got chunky chunky colas and a great yield. I'll find out how the oil is soon enough. Note I said 56 days, the strain used to be a 42-45 day flower, Greenthumb lost that mother, so now its a 56-60 day flowerer like most others. As a result of this, I'd rather grow Bubblelicious or something (which we happen to have 4 mothers of now ). Fun to try but not for the price.