and note the increased purity isn’t to remove the all-ready removed harmful contaminates (BTEXs), it’s to increase the purity to serve as standards for sensitive analytical instruments or medical device production… but this might be just a guess.
3 Likes
no probs ill send them an email.
of course your not beating the point into the ground.
and I do understand that there are people here that are very closely tied to the industry.
but the whole idea of someone and not just one someone claiming a product is
not what it is and then selling it world wide is something new to me.
I have in the past come across dodgy people but this is starting too look like
it is the entire industry.
Squig,
I gotta believe that the companies offering those little cans of super-pure butane likely started doing so decades ago when A lot of folks were open blasting. The only butane available to them was commercial butane I used to use to fill my nice cigarette lighters (Rosignol?)
That gas was crappy so someone had a great idea to label high purity butane in these same cans. 99%, 99.9%, 99.99% . . . . the more nines the better. Then some other guy copied their business model and did the same. Now Puretane and others are selling 99.999+% butane in 20 and 100 pounders. How can they get away with it??? Because:
-
Few if any users have the ability to test the butane or standards to test it against.
-
Sending gases out for testing is expensive.
-
If the gas works, it works, so why bother? (Although gasoline and pure benzene are also good solvents).
-
Very few people are familiar enough with hydrocarbons to call bullshit I’d bet there’s a market for 99.9999999996% butane.
We all have our strong suits. I wouldn’t be able to recognize a terpene, but I do know quite a bit about gases and chemicals. Also learned the hard way that a 20 mg gummy is way too much for me to take.
Enjoy the weekend.
3 Likes
Ummmm, I’m fond of “cunning linguistics” myself but lets also consider lies, damn lies and statistics.
If the most common pollutant in n-Butane is Iso-Butane, Propane, and n-Pentane, what happens statistically when you offer them in a tri-mix?
8 Likes
just found this.
if you are not sure what to do with bad butane do this with it 
I doubt it will be up on thingiverse for long.
3 Likes
Good Morning Greywolf.
In theory, you make a good point. In practice, it’s a little off - if you’re picky like I am. First, the pentane contamination in n-butane is not n-pentane (normal pentane, with 5 carbons in a row), rather, it’s neopentane (also called 2,2 dimethylpropane, with 1 center carbon as a hub and 4 methanes spoking from it). A claim that the tri-blend is 99.999% pure is horse shit if butane is the major component and has as little as 21 ppm neopentane in it.
A tri-blend will likely mask the purity issues of the components, BUT, every state I’ve checked requires solvents to be 99+% pure. If it’s a blend of solvents, each component must be 99% pure prior to blending. Check the laws in your state. Of course, there is no way to test a final blend to determine the purity of the components prior to blending. No way to verify that the supplier is starting with good components, BUT, the presence of C5’s: neo, iso and normal might be significant enough to take the blends out of the mandated minimum purity of 99%.
Two concerns: The benzene contamination that caused this thread, clearly indicates that there is shitty gas in the marketplace; some company / companies is/are selling hydrocarbons that are high in benzene. Is the primary suspect going to be the companies that fill and blend legit high purity C3 and C4’s from an ISO certified manufacturer OR one of the companies that doesn’t tell the truth about the purity of the gas they sell? To me, the defense of “It’s not our company because our butane is 99.999+% pure” rings very hollow.
Second concern that applies more to commercial operations than to the small operators buying one tank at a time - - does it make sense to have one vendor for tri-blends where cross contamination of C3 and C4s cannot be detected in the blend and another supplier for dual blends and pure gases where the cross-contamination puts the product out of spec?
T-time in 40 minutes - over and out. Cheers, Jim
3 Likes
[quote=“GasGuy-QEG, post:346, topic:151559, full:true”] In theory, you make a good point. In practice, it’s a little off - if you’re picky like I am. First, the pentane contamination in n-butane is not n-pentane (normal pentane, with 5 carbons in a row), rather, it’s neopentane (also called 2,2 dimethylpropane, with 1 center carbon as a hub and 4 methanes spoking from it).
A claim that the tri-blend is 99.999% pure is horse shit if butane is the major component and has as little as 21 ppm neopentane in it.
A tri-blend will likely mask the purity issues of the components, BUT, every state I’ve checked requires solvents to be 99+% pure.
If it’s a blend of solvents, each component must be 99% pure prior to blending. Check the laws in your state. Of course, there is no way to test a final blend to determine the purity of the components prior to blending. No way to verify that the supplier is starting with good components, BUT, the presence of C5’s: neo, iso and normal might be significant enough to take the blends out of the mandated minimum purity of 99%.
Two concerns:
The benzene contamination that caused this thread, clearly indicates that there is shitty gas in the marketplace; some company / companies is/are selling hydrocarbons that are high in benzene.
Is the primary suspect going to be the companies that fill and blend legit high purity C3 and C4’s from an ISO certified manufacturer OR one of the companies that doesn’t tell the truth about the purity of the gas they sell? To me, the defense of “It’s not our company because our butane is 99.999+% pure” rings very hollow.
Second concern that applies more to commercial operations than to the small operators buying one tank at a time - - does it make sense to have one vendor for tri-blends where cross contamination of C3 and C4s cannot be detected in the blend and another supplier for dual blends and pure gases where the cross-contamination puts the product out of spec?[/quote]
Good points and valid concerns.
You are no doubt right on the Pentane, my point was directed at the statistical math.
Also a valid point that you can’t make chicken salad out of chicken manure. It doesn’t matter where the contaminants other that butane and propane came from, they end up in the final mix.
The benzene contamination that started this thread most certainly does highlight a a gas purity issue more serious than how far Madison Avenue can move the decimal point out.
I also believe that claims from companies that take great Madison Avenue liberties with easily discounted ones should be held in suspicion and closely vetted.
8 Likes
“you can’t make chicken salad out of chicken manure” … 
I’m gonna use this one!
7 Likes
Flagged for spam.
You need to have something else to add to the conversation or everything repetitive is spam. The same comments over and over are spam
15 Likes
What if the pot is contaminated… This seems like a Pot contamination as several of you guys are having this issue with processors…
1 Like
We have certifications on our batch or “pot of coffee”. That is why we offer a COD with every COA.
But that batch of gas ie “pot of coffee” is only inspected going in from what I gather. What happens if the pot is contaminated.
This don’t seem like a solvent tank problem but more like a gas distribution problem.
7 Likes
I have a question for the gas guys. What is the relationship between diversified and Kaplan ?
9 Likes
Every time I see this copypasta vs more than one a month I’m flagging it from here on out
15 Likes
Thank you
5 Likes
Kaplan sells diversified gas. Not sure if there is people in the middle between them.
3 Likes
Divirsified is a high purity chemical and gas producer that may or may not supply distributors like Kaplan.
Now Solvent Direct clients can look up their UHP gas and cylinder purity certifications on our website using cylinder serial numbers. Stop wasting time and money distilling toxic mystery oil in your lab.