The black sludge cometh - priceless!

Thanks for showing the cleanup - a lot of these sorts of videos usually don't show that (I guess it's not sexy or something) but I usually have a lot of questions about how to remove that kind of gunk, what to do with it, etc.

9:30 holy crap... I had no idea bumping could be so violent.... Thanks for sharing! Thats the kinda stuff that ppl can learn from but usually gets edited out so the chemist looks better. So thanks for sharing it!

12:00 very refreshing to see glassware cleaning in a chemistry video

Thanks for having so many videos recently, you satiate my hunger because I have no shed.

OMG I finally saw you mess something up! 😂🤣 I was actually thinking "I wonder why he's not using a lab jack this time..." 🤔

Thank you for showing the cleaning excitement. We are often left wondering with you KZfaq magicians always having clean glass for new experiments, there is always that small doubt that you just chuck the dirty stuff out when it looks hard to clean.

Hooray, another volcano! Thanks for detailing the post-gunk purification steps.

Dioxane is miscible with water and forms an azeotrope. Salting out water with NaOH or KOH is about the only effective way to dry it. You should have removed and discarded the tarry lower layer instead of adding it to the flask. This reaction produces another product as well: 2-methyl-1,3-dioxolane (possibly 20-30% of the yield). That is, the ethylene glycol acetal of acetaldehyde, which forms through acid catalyzed rearrangement of the glycol. This boils at 82C and without a very efficient fractionating column is a pain to remove. It will withstand treatment with sodium (which melts, forming shiny metallic globules in refluxing dioxane). However, at the slightest hint of strong acid and water, it comes apart to EG and acetaldehyde and rapidly discolors.

Yet another good video Doug. Keep up the great work.

Fantastic opening minutes, in terms of clarity and conciseness.

Hello, for the fist distillation start slowly raising temperature, throw away anything that coming over before 49 degrees Celsius. Only keep the distillate from 50 degrees Celsius to 103 degrees Celsius. Or you going to get a lot of different byproduct that is hard to separate later.

"You can't screw it up" 10 minutes later..

I really enjoyed this presentation thanks

Hi sir your growing my chemistry knowledge Thanks a lot

You turn off heat but NOT the stirring. In fact, in this case, you should turn the stirring up faster if possible.

I *really* like the way you showed the mishaps, and even more how you managed to recover from them. Things don't always go smoothly when making anything, and being able to recover is important. BTW, I think I made that black product in my kitchen, but acetone wouldn't touch it.

Wow, that was interesting.

I've found K2C03 to be an excellent entrainer. MgS04 seems to be the choice of the u-tubers but pot-carb was what I came up with after reading a few papers. I have a 3 distillation process for ethanol. Kind of overkill but I think I'm getting proud of it. A good 5ml shot of it is an ... experience.

I feel for you, having to clean your columns and trying to save the products. Happened to me a couple of times XD But awesome video anyways! :D

What is the black power supply that you have plugged into the back of your hood for your mantle called? And where can I buy one?

💜💜💜

Doug and 42 Doug should do collaborative KZfaq video. Sweet.

Yay ! Very very nice video, i'm following organic chemistry classes and i find your videos very entertaining :D I've dealt with organometallics before and it's really no joke n_n I have a question : Did you bought all of your apparatus ? Or did you have some contacts that can give you some / sell it to you for a lower price ? I'd like to build myself a little lab and your videos are great for that :D

Cut out a hole in your table where the mantles are, use shelf slotted hanger for adj. plywood table. Or use threaded rod floor stand underneath hole in the table. Or quick clamp stand to vert. riser. Nice to have work at comfortable level.

I have fredrichs condenser and I was wondering: which condenser when and why? Can I use fredriches condenser for all needs? Thanks

What would be the product using 1,4 butanediol instead?

At 15:10 and onward, in the separatory funnel, is there not a layer on top of the 1,4-dioxane? And if so, why was that not separated out?

Estimated Doug, can you kindly help me to get treethylene glycol, either how to syntetize it or where to buy it, thanks before hand J. Audry

I have a question what kind of reaction would form if u mix vineger and 1 4-dioxane?just asking because it has a sweet smell

You should add sulfuric acid to the azeotrope to destroy the 2 methyl-1,3 dioxolane. This will hydrolyze it back into ethylene glycol and acetyladehyde which can be removed by the hydroxide polymerization and a redistilation. There is a lot of 2-me1,3 dioxolane that comes over with the azeotrope at 85-90C

I came across this channel. while looking in to how ether is made. and I'm looking in to home made fuels. like from distillation of wood. I want to run my generator at my off grid home.. methanol with about 10% ethanol. with very little h2o. could you tell me if this will be practical ? or could I run to strait from the still?

makes me wish i was good at chemistry. i was very interested in it at a time but the math that is required killed it for me

Doug, what do you mean by store over base/na metal? you mean put a nugget of sodium in the bottle with it?

The funniest thing about this experiment or demonstration is in the beginning you said you can't mess it up sounds like a jinx you can always prove yourself wrong it made the video more exciting at least

so, what exactly do we need that column for? Can't we just distill it without it? btw, nice video ;)

You should make a video on the extraction and purification of 1,3,5 trioxane from solid fuel tablets.

Doug I love your videos. I wonder if you could do a video where you go over some of the finer points about your lab? Thank you.

What about using it to make glacial acetic acid - it forms an azeotrope with water that boils below acetic acid ? Just a crazy idea ;)

It's fully saturated, not unsaturated.

Short Path distillation may be better?

SUPERB LY DESCRIBING VIDEO COULD I GET PROCESS DETAILS FOR PRODUCING DI BUTYL ETHER

Would this work with sodium carbonate? Seems easier to get.

What if I have a mixture of ethylene glycol and diethylene glycol. They come as chafer burners. Would the reaction not change were no sulfuric acid would be needed. But maybe another acid to still keep the reaction on the right path?

I actually cringed when the goo came up... reminded me of something that happened to me once in org synth lab back in UG ;) btw - how come your Keck clips are orange, if you have 24/40 glass ground joints - aren't the 24-size Keck clips suppose to be green?

hi. just one thing i don;t get @0.36 "Oxygene has a lone pair of electrons". what do you mean by that? afaik O has 2 valence e- (2px,y) which are used with the 2 C and remains only a full 2pz. so what do you mean by lone? maybe it's just a matter of interpretation from my side. And as always "thanks for producing such videos" ;) EDIT think i got it, it related to Dative Bond right? i find it ambiguous to call 2e- in a full orbital a lone pair, as they are not so alone... comment?

can I use sodium sulfate or magnesium sulfate to dry it?

As a layman, I'm completely fascinated by chemistry. Could someone enlighten me on the issue of "bumping"? What is it and how does the stir bar prevent it?

How dose 1,4-Dioxane's chemical properties compare to 1,4-Dioxin, Is it as different as benzene compared to cyclohexane? I know hydrogen saturation can make a big difference in chemical properties.

You're putting sodium in end bottles for storage?

Can you store with copper wire to keep the peroxides down?

Where does your sink drain go?

21:05 turn on captions

isin't ethylene glycol a vicinal diol?,so the acid didin't cause a Pinacol rearrangement to produce Acetaldehyde

Any updates?

Wouldn't it be better to keep stirring? When that happens to me, I just stir a lot, the foam doesn't rise!

Hehe, but I feel your pain there, but love the narration

WHERE IS THE LINK???

"Dude's Red Hot Devil Potash"

Can you purify it by crystallization instead of distillation?

Why do you need to use sulphuric acid? Can't you use hydrochloric acid or other types of acis?

Rub acetone-wet paper towels against your reaction flask to cool it down faster

If your dioxane and water both come off together you haven't really driven the reaction to completion have you? I guess the lack of acid in the receiving flask would limit the rate of hydrolysis, but surely there's a way to reduce the effective water concentration.

"Ohhhhh, dear......"

' you can't screw it up' Wanna bet? I managed to screw it up. I believe my acid was too dilute, about 70% after measuring density.. i redistilled it but still, adding naoh made everything a goopy tarry mess with polymerased stuff at the bottom and black liquid which i believe it's water and tarr... I have to check my thermometer too, I don't think it's calibrated..

Oh yea, one last thing, stabilize with BHT and 3A sieves.

15:39 you should have poured it from the top

shoulda used a lab jack... lol thanks for the awesome videos. Lol, you just said use the lab jack after I wrote that

No lab jack!

man, you turn the stirring UP to stop foaming lol.

look like Venom coming out

what you can do is use Allihn column with either no cooling or just slow air flow from a fish pump. Also, the biggest thing is to insulate your junction with tin foil. That will eliminate excessive reflux.

2HO-CH2-CH2-OH->C4H4O2(benzene cycle with oxi is on the top and the bottom )+2H2O

Old school yt videos.

Could you please tell me your Facebook I am a chemistry lover and I have a home lab ,I want to talk to you on Facebook!

11:25 you get a small tutorial on how to clean a bong. Drugs are bad kids