UC235 - 2011-12-12
A mixture of branched chain hexane isomers with a boiling range of 50-65C is isolated from an inexpensive electronics part cleaner. This material is an excellent solvent for extraction, recrystallization, and chromatography. Recovery is between 85 and 92%, depending on actual hexanes content (The range is determined from the MSDS). The intro music clip is from "Stealing Fat" by The Dust Brothers. I believe this falls under fair use.
@staratsx I use a thick walled foam cooler with a plastic liner (trash bag). Without the bag, water slowly seeps through the foam. I sit a medium fountain pump in the cooler and fill it with icewater. The bath can be maintained at 0C with reusable ice packs, which I keep a generous supply of in the freezer. Loose ice will drop the temperature much faster though, and if I forget about it for a while and come back to a warm water bath, I will throw a few fistfuls of ice in there.
7:05 You said you found the commercial isohexanes in a "industrial solvents" book - Mind sharing a link to it? I looked on ZLib, but there's quite a few books that have a name like that.
From the temp you cited this could easily have been the azeotrope. I-Hexane and Methanol form a 58:42 azeotrope at 45.6C, which is right at what you said it was boiling over at.
@staratsx I have a chemglass single-stage teflon diaphragm pump that I picked up used off of ebay for $135. No water, no oil, and it's immune to chemical attack. It pulls down to a consistent ~30mm Hg and is thus comparable to an aspirator without any possibility of suckback.
@99Chemicals The pressures needed to liquify it and thus efficiently pressurize cans with it are vastly higher than things like 1,1-difluoroethane and 1,1,1,2-tetrafluoroethane and would necessitate extremely strong (and thus heavy) metal cans. CO2 is sometimes used, however. Starting fluid is often pressurized with dimethyl ether.
Great video! You have some awesome glassware too.
@staratsx A fountain pump is not nearly powerful enough to drive a water aspirator. The problem with looking at flow rate is that it tells you almost nothing, because the flow rate will diminish rapidly depending on how high you pump the water. An aspirator requires that you pump water under pressure, which is mechanically identical to pumping it a lot higher up. A beefy pump is needed to match the typical faucet pressures of 40-60psi, which will likely run you at least $100.
Will these hexane's bond ETFE clear plastic film and remain flexible if not do you know what will?
thanks for educating me on the purifications of hexane isomers. sure will come in handy for constructing a column.
I wish you lived next door. Brilliant. So helpful to my understanding of purification of (xyz)-hexanes! FWIW, in Melbourne, Australia, anyone can buy 20l of ~65% n-hexane from OilChem in Epping, Victoria, for ~AUD$75. Now, I have to learn how to purify THAT!
Dude, chill out, its an amateur procedure for amateur use. No one is claiming this is as good as HPLC grade stuff. This video is more for the educational value of performing a fractional distillation. Alot of amateurs make stuff just for the sake of saying "I did it!" rather than actual cost savings or purity. Take a deep breath, and chill out. And have a little respect, i know what i want, i don't need you telling me what i want. I buy hexanes by the truckload, i know where to get them. :D
I know that this video is a few years old, and it is very good, but hexanes are now available to amateurs on eBay and also amazon.com
Yeah, I was going to say this as well. You can get a 32oz Hexane for $28 (which the product description says its high purity... but idk if that means lab grade, technical grade, etc). It says it's meant for extraction even... lol.
https://www.amazon.com/Hexane-Tech-Grade-Quart-Ounce/dp/B00HVR109U
I try and defend all amateur chemists, there are so few of them out there and they're constantly trashed on and vilified. I know you might not like this vid, but i'd rather it stay as a teaching tool, as imperfect as it may be. The quantum dot synthesis is dangerous, but yes, it's only for education. I clearly warn people at the beginning that it should only be attempted by experienced chemists or under their supervision (like in a college/univeristy teaching lab).
13:00 you missed one last CRUCIAL step: label the bottle! Without proper label this bottle content must be properly utilized to waste immediately as camera turns off!
Why isn't nitrogen used as a propelant in aerosol cans? It would seem like it's cheaper and more enviornmentaly friendly.
Hexane for Fecl3????
I'm already jealous of your glassware and equipment...
"shop clean" is a solvent i use at work, it is a mix of hexane and naphtha
I tried this same extraction for other solvents in commercial spray bottles and found the condensing a problem when gasses are exiting the condenser, some of the solvents will escape with the gas and wont condensate. I guess this is due to dew point of a vapor in a gas. I have a chiller that has no problem of maintaining a temperature of well below -10C. Great vids btw (:
Awesome video! I just wanted to add, I found pure iOS hexane at an auto store here in Canada. I just emptied it out after taking from the freezer and there it was -easy.
I just went to Canadian tire looking for these chemicals. I wasn't successful but I found a pure form of haptane. It is an aerosol product for cleaning breaks on vehicles. It contains nothing but heptane and co2. I just emptied it out into a beaker and got pure heptane while the co2 went into the air. Never knew how light heptane was compared to chloroform. Just thought I'd let everyone know.
heptane does not boil at 70°C
@@jeanpierredaviau7478 he never said that it did. Lmao!
There is a can for blowing out dusts from electronics at the dollar store. It says difluroethane. I assume it is 1,1-difluoethane and boils at -25 °C. I wonder if it is pure. Would be good to use as an inert gas.
UPDATE : yes, it is 1,1-difluoroethane.
Vrej Egon Spengler
Except that 1,1-difluoroethane isn't inert. HFCs are actually very reactive.
@staratsx Nope. You should buy a dewar type condenser for that sort of work (which looks rather unlike any normal condenser). The cooling liquid need not circulate in that sort of setup
Is this purity adequate for use as a solvent to extract non-polar plant oils for human consumption, assuming that the hexane would be properly evaporated before the oils were used?
As I told another commenter, don't use recovered hexane to extract your THC oil, man. You pot heads are something else. Lol!
"Didactic Value"
Wouldn't a fractional distillation setup be better for separating the mixture?
Sean...
I Just Commented On The Same Thing, I Didn't See Your Comment? But, Right On!
Dude, check the comment chain, you ARE talking to me when you replied to my original comment.
niceeeee condenser btw 👌🏻👌🏻👌🏻
Wait this isn’t a homestuck fan comic
If you use hexane as a plant solvent, can you then burn off that hexane after the extraction?
Don't extract your THC oil with hexane man.
fire bad, beer good
Very informative! Can this be done with any other alkane solvents?
UC235
Why Not Just Buy 1 Gal. Of HEXANE From eBay?
This can be done with any solvent actually......
@edgecaseify And this has made me quite jealous of your local industrial lubricant supplier...
will you please tell me how to test hexane because I got a PCB cleaner which forms a cloudy mixture with water and burns like alcohol
Where to you pick up your glassware at? I have issues finding anything greater than 3 neck unless I go straight to fisher or somewhere you pay top dollar.
How to use hexane in purifying essential oil or absolute oil? Please respond, or if you have a video on this topic please send it to me.
Интересное видео, только долгое очень...
What fucking vid? i didn't make any video on hexane.
Show me the oil then bud!!! From your contact cleaner,lol
shane brady i prefer to use contact cleaner. Different can, different method. Good taste though dont knock until you try it.
lol, yes, i realize that, you came off like it was your vid, i see your a chemist with a brain, how unusual in the states, the quantum dot vid was very interesting, but a dangerous process, just for education i assume!
Your not wrong about trashed and vilified,lol Try and make people see sense and logic when their empty heads are full of misinformation, they just shit on you,lol. Oh well, its their health:/ I just wish he had left the contact cleaner out, BHO is bad enough without adding shit hex extracts to the mix, especially when its one of the best when used right:)
What purity, 99% or nothing!!!
Kinds loopy is hardly a proper warning!!! RESPONSIBILITY!!
@NurdRage - 2011-12-30
this is pretty cool. I never knew i could find hexanes in electronics part cleaner. very informative!
@davidrobinson2210 - 2018-05-02
NurdRage yep, forrums will teach you more that youtube will. I found out this info on icmags. About the contact cleaner.
@BackYardScience2000 - 2020-02-21
@@davidrobinson2210 , I'm pretty sure that he already knows that. Lol!