What color tank is best for passive closed loop extraction going onto short path distillation? Each color r600 refrigerant is 99% pure of different solvent mixes. I have only used the grey r600 (70%Butane30%Propane) and want to switch to 99% Butane. Can someone explain the different types of r600 and what blend is for what application? I havent had any luck with google! Thanks Everyone!
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What color tank??
I like stainless 
A quick search demonstrates that tank color is vendor specific rather than blend specific…
above are both 99+% n-butane.
@Dred_pirate and @Soxhlet both run passive, and could perhaps address the blend they prefer.
What differences can you point to between propane, n-butane, and iso-butane?
How might those differences affect the process you’re planning to implement?
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I believe he’s using the xtane solvent. They paint them seperate colors for different blends or what have you.
@b.laz-e415 what type of setup do you have and what do you use to recover?
sure…but pointing out that color of the can is not universal and therefore a lousy discriminator or descriptor is part of the information OP should have.
…called you in to provide the rest 
Your picture totally didn’t pop up the first time. Oops
the real question is about the physical properties of the solvents, and their blends.
thinking about those aspects, rather than accepting “use the blue can” as an answer will serve the OP and others behind them…
not having played passive since playing with blends, I have only first principles to work from…and I’d use straight n-tane. because BP (condensation).
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I’m with you.
I asked what setup and means of recovery he’s using.
Not the op. I’m using passive. What would be the ideal gas to run for a 4x48 tube. Ideally ending with shatter. I’ve only used 70/30 and am not digging the outcome.
currently i am using the x-tane silver (70%butane30%propane) and recovering into the yellow 25lb (both seen in the pic above) I think id like to switch to 99%butane. Thoughts?
Am OP, SAME EXACT SITUATION! I hear that different mixes do different things such as higher yields of lesser quality, lower yields of higher quality, some make a brighter, clearer product… does anyone know these specifics?
I had a feeling that’s what you were meaning. Solvent use is all up to personal preference. But, I have ended up with using isobutane as my primary solvent. Few reasons. @anon60420198 as well.
Isobutane is made from propane, they isolate out something and it turns into a butane. It’s the same chemical structure as butane, but a different molecule shape. It works like a blend, without having to deal with a blend. It extracts similar to propane, as in giving a “golder” extract, being as it grabs less fats. It has a 20f lower boiling point and recovery is extremely easy. But, it has a lower boiling point, so it can’t be condensed as easy. You’ll need to use more dry ice than normal. Did I mention it recovers really quick. Along with the lower boiling point, it’s obviously colder, which is one reason it grabs less fats giving a better color. It also acts like a butane in grabbing a large assortment of cannabinoids, along with a little bit more terpenes than regular (Normal) butane.
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Highly interesting as I worked with whip-it premium as my first canned butane to use with closed column and then switched to puretane later on but then noticed a shift in colour and terpene content. So… That makes sense.
I also noticed a higher psi on my gauge hitting 60psi instead of 30 when I was doing closed column. So automatically I knew whip-it was probably getting more terps and acting as a heavier solvent.
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You’d love a real 70/30… It’s a different BEA$T!!!
I made the switch to big boy tanks last year, shipped, best thing I ever did! All I ever used was 420ml whip it premium, Good God sir I went through tons of those!
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I was thinking about getting a tank to have the option of a 70/30 extraction. I heard 70/30 blends and 100% propane runs are great for live resin runs so I was thinking after I grow a.few plants I’ll do a live resin run with 70/30.
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so what can you tell us about the physical properties of the three gasses in question?
how might those effect what you’re trying to achieve?
which would help? which would hinder?
You’ve read some stuff. what is your interpretation?
none of the bro-science hand wavy stuff.
actual physical properties.
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I’m not sure you can recover into those tanks
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One thing to be concerned with, if going from butane to propane or a blend, is the higher pressures. For the guys at home, this means high pressure clamps etc. Make sure your set up is safe for the pressure increase.
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