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Purification of Sulfuric Acid by Distillation - Revisited

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In this video we purify sulfuric acid again using distillation but improve our technique using a ceramic hotplate stirrer and PTFE tape to seal the joints.
I start by highlighting the inherent dangers associated with handling sulfuric acid and stress the importance of safety precautions, including wearing protective clothing and performing the procedure in a well-ventilated area or fume hood.
I explain why obtaining purified sulfuric acid is essential for certain chemistry experiments and discuss common sources of impure sulfuric acid, such as drain cleaner or battery acid. I then detail the equipment needed for the distillation process and share improvements I've made, like using a ceramic hotplate stirrer and PTFE pipe threading tape for sealing joints.
Throughout the video, I emphasize safety measures, such as using a containment bin to mitigate potential glassware failure and avoiding direct contact with boiling sulfuric acid. I provide tips for recognizing when pure sulfuric acid begins to distill over and explain the challenges of achieving concentrations higher than 98%.
Additionally, I address safety protocols for handling spills or accidents involving sulfuric acid, including neutralization procedures and the importance of protective gear. I also discuss the chemical properties of sulfuric acid and its various applications in chemistry.
Overall, this video serves as a comprehensive guide to safely purifying sulfuric acid for laboratory use while highlighting the risks involved and the precautions necessary to mitigate them.
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Опубликовано:

30 мар 2024

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Комментарии : 392

@NurdRage 4 месяца назад

Ya know, i keep talking about how dangerous it is, i'm tempted to demonstrate it by pouring boiling acid on something.

@aarocka11 4 месяца назад

Do it. It’s what our Lord and Savior NileRed would want.

@John.Flower.Productions 4 месяца назад

Turning the fume hood off would have demonstrated the most immediate danger.

@custos3249 4 месяца назад

Face reveal?

@Wreaktifier 4 месяца назад

Raw eggs are a good example, they blacken from the reaction in addition to cooking from the heat of the reaction.

@serraramayfield9230 4 месяца назад

@@custos3249never

@adrianpip2000 4 месяца назад

I think it might be worth mentioning that PTFE has a much higher thermal expansion coefficient than borosilicate glass. In practical terms, this means that you shouldn't use too much PTFE tape on the joints, because you might risk cracking the glass joint as the temperature increases. I've had this happen at least one time (though I wasn't doing anything critical or dangerous).

@eccentricelectrician1904 Месяц назад

Doesn't matter if its glass or steel. Too much tape leads to leaks

@richardunruh4035 4 месяца назад

Excellent video, as usual. Tip for distillations that yield corrosive / poisonous gasses (like distilling nitric acid via H2SO4 + KNO3): I modified a small cheap fish tank air pump so it provided vacuum rather than pressure. After the water was driven off in the beginning of the distillation I routed the gaseous byproducts through a sealed glass jar containing NaOH prills and pulled a slight vacuum through the NaOH with the "vacuum pump". The vacuum was only enough to prevent escape from the joints in the apparatus and the NaOH captured the NOx. I did all this because I made my own fume hood and I didn't want to depend on it as my one and only defense against escaping NOx. Please, if any professionals out there note that this method actually creates a hazard I'd love to hear about it.

@ivant5054 4 месяца назад

careful with passing it over solid NaOH since the reaction can be quite violent if, let's say, a bit of acid were to come over, it's better to bubble it through a concentrated NaOH solution with a trap before teflon tape is your best friend

@richardunruh4035 8 дней назад

@@ivant5054 Sorry for the delayed reply. You're right, which is why I had a trap upstream of the NaOH. I experienced a suck-back explosion once (fortunately just water). That taught me the lesson about sealed pressure/vacuum systems. They will bite you if you let them!

@moszeusz 4 месяца назад

In Poland we say: kwas siarkowy to krew przemysłu chemicznego, which means: sulfuric acid is a blood of chemical industry.

@leichenkocher 4 месяца назад

Good saying! It is said the industrial output of a country can be measured by consumption of H2SO4/year.

@phobos1963 4 месяца назад

H2SO4 Is truly an amazing compound, not only its first proton has a negative pKa, but it's perfect for dehydrations, as SO4 2- cannot do substitution reactions, it's one of the pillars of organic chemistry really

@dxdgdhdx 4 месяца назад

Polacy tutaj, tego się nie spodziewałem

@brainandforce 4 месяца назад

@@leichenkocher It's also really, really bad when a lot of blood gets spilled.

@rezzer7918 3 месяца назад

Cool. Poland Rules! 🇵🇱

@dav1dsm1th 4 месяца назад

I put "Caution: Coffee may be hot" and "Warning: Boiling sulfuric acid is extremely corrosive" in the same "If you need telling this, you really shouldn't be playing with it" category 🙂 Thanks for the videos. Always interesting and entertaining.

@MadScientist267 4 месяца назад

Indeed but the joke about modern car maintenance (valves/battery)... Let's just say you never know 🤣

@scrappydoo7887 4 месяца назад

Not just that, there's the "DO NOT EVER HAVE THE CHANCE TO GET WATER IN BOILING SULPHURIC ACID" it's way too fast a way to get to hospital really fast and never look the same again lol

@josuelservin 4 месяца назад

The problem is that we don't know what we don't know, so when someone who knows repeats that something is very dangerous I have learned to pay attention even if it seem annoying, because it probably will save my bacon...

@MadScientist267 4 месяца назад

@@scrappydoo7887 You have a good point. I'm aware of many of the various dangers with sulfuric acid, including not adding water to it at reasonable temperatures... I suppose I never extended that to the extreme case of the acid being already at boiling temp... common sense says it's going to result in flash boiling of the liquid yet the thought hadn't crossed my mind as such. The mention appreciated indeed, just in case there's a day that comes.

@scrappydoo7887 4 месяца назад

@@MadScientist267 it's all good 👍 that's why we are all here. I've seen a single large drop of water going into a beaker of boiling Sulphuric acid and it basically all jumped out of the beaker. It's extremely fast and stupidly dangerous. For context it was the process of "wet ashing" bga chips for the recovery of gold bond wires outdoors. It was done under a corrugated tin shelter that the person didn't realise leaked. A small shower ensued and while we were out of the way the water got into the process and the result was that violent it was heard from ten feet away. We looked around to see white fumes everywhere and multiple spots we had stood soaked in hot sulphuric. Extremely scary

@Tom_Johnsen 4 месяца назад

A stainless steel food tray, commonly known as a hotel pan can be found used practically free, and can be found in sizes about the same as your plastic tub.

@djsnowman06 4 месяца назад

I've also seen them advertised as "Anti-jam pans"

@mernokallat645 4 месяца назад

And concentrated sulfuric acid will passivate stainless steel, protecting it from corrosion. Nitric acid will do the same.

@j_sum1 4 месяца назад

My first major accident in a home lab setting was when boiling down sulfuric acid that I made by copper sulfate electrolysis. I had around 200mL at I estimate 80% when it bumped and the 1 litre beaker landed on the concrete floor. I did get some splashes of boiling sulfuric acid on my ankles and some clothing was ruined. A garden hose prevented serious injury. It was a good lesson to learn, but not the best way to learn it.

@quackerzdb 4 месяца назад

That's a great tip with the teflon tape. Thanks!

@bigjay875 3 месяца назад

I love the safety aspect of this channel and ya saved me from making major mistakes in event I have a major accident. Thanks

@fmdj 4 месяца назад

4:50 ahahah you said PTFE tape right when I opened the comments to write that PTFE tape made a pretty good job at sealing joints for distilling H2SO4 - the trick is to wrap it reaaal tight and to not go further than the stopper / male joint or even to stop slightly before that to limit the quantity of PTFE that gets exposed to the H2SO4 vapors. For plugging openings such as with a 3-neck round bottom flask or other glassware necks that need to be plugged normal chemistry rubber plugs also do a surprisingly good job. The part exposed to the H2SO4 will carbonise, but it does so in a slow manner and once the carbon is there it kinda protects the rest and doesn't pollute the solution (H2SO4 will just convert a bit of it to CO2 I guess). Rubber seals do an excellent job in this scenario, even though they get a few milliliters shaved off each time. I'm currently working on a device that should be able to plug one neck of a round bottom flask hermetically even to H2SO4 vapors while letting a stirring rod stir the H2SO4 during distillation - cuz my homemade heating mantle doesn't have a stirrer and as you said, H2SO4 bumping is one of the most terrifying things I have ever seen.

@knglaser 4 месяца назад

have you tried putting two glass tubes long enough to stand in the round bottom flask, and sanding them down to a opaque white finish ? this worked for me when I did not have stirring.

@MadScientist267 4 месяца назад

@@knglaserHow does that work?

@knglaser 4 месяца назад

@@MadScientist267 nucleation sites distributed through the entire depth, without hindering the convection as a big pile of glass shards on the bottom would do.

@MadScientist267 4 месяца назад

@@knglaser Hmmm interesting... ok cool thanks

@fmdj 4 месяца назад

@@knglaser no but I'm very much intrigued, your idea sounds pretty good and I'm definitely gonna try that! I was thinking of insulating magnets in a glass rod with a bend in the shape of a T at the end and rotate that with a motor and magnets but from the top of the round bottom flask where 1) I have access and 2) the temperature is less insane. But if your method works I'm definitely trying it first, thx.

@EdwardTriesToScience 4 месяца назад

i can vouch for boiling sulfuric acid, it violently dissolves a hot dog until there's nothing left, along with wood, plastic, rubber, nitrile, and basically everything else that is organic. not something to play with, especially without some kinda of thick, non melting glove (leather welding gloves can survive small splashes and prevent burns but dont rely on it) great video as always, ceramic hot plates are the best! i got three of them (two made one commercial, homemade uses corning parts and commercial one is a trusty thermolyne SP131325) and theyve been running the lab nicely for years, i had an aluminum one i built but the aluminum definitely softened at 400c or so, i also simply just didnt like the feel of glass on aluminum

@NautsuJJR 4 месяца назад

its good to see you revisiting classics and updating them

@twocvbloke 4 месяца назад

Here in the UK, wet lead acid batteries now have to be pre-filled by whoever you buy them from because of the alarmingly frequent acid attacks, the logic being that people aren't smart enough to work out to remove the caps and tip it all back out again, gotta love the brains behind the laws... :\

@mfbfreak 4 месяца назад

You overestimate the intelligence of people. It can be done, but it's another hurdle to take.

@robertthabassist 4 месяца назад

By people, you mean muslims...

@oxylepy2 4 месяца назад

Look, during the eclipse people were calling stores to ask if they had eclipse glasses. During the eclipse, when the time to travel to and make a purchase from the store is greater than the time the eclipse takes. There is always a portion of the population that should have failed to thrive by that point in their lives, and it's a government's goal to keep those people thriving.

@Cornz38 4 месяца назад

More of these updated re-runs please for us "prepper chemists". Such as creating the 3 basic acids easily.

@lexer_ 4 месяца назад

I always apprechiate safety disclaimers like theses because telling people not to do something never works. Explaining how to be as safe as possible and providing as much information as possible on not only how to avoid accidents but also how to handle one pragmtically in case it inevitably happens anyway is probably the best possible approach. I am just a bit sad that there is no possible way this is not demonitized right from the start.

@barfbot 4 месяца назад

stuff like that callout about azeotrope actually being sulphur trioxide is what makes these videos awesome!

@friendly_alkali 4 месяца назад

fwiw i think the safety information/discussion of risk mitigation isn't doom and gloom and is actually interesting. i wish more chemistry videos talked through their risk analysis process like that for more procedures

@henrysymes 4 месяца назад

G’day from Down Under - love to see an upload from you brother! As for demonstrating the effect of boiling sulfuric acid my suggestions would be getting a little on a lab coat or an old pair of shoes. Point being, “look how fast it can get through to you”.

@D3ltaLabs 4 месяца назад

I haven't watched one of your videos in years. They are just as I remembered.

@TheIdeanator 4 месяца назад

Ive always wondered if PTFE tape would work for joints. Glad to see it stands up to one of the meaner amateur processes.

@harms123 4 месяца назад

Very nice. I appreciate the safety warnings. Can't imagine the horror of having an accident with boiling sulfuric acid. If you're going to pour it on something then I'd suggest some kind of meat. Then there's even a "Something like this would happen to ya if ya spill it on ya", and more importantly, it would look very neat I think lol.

@timmer9lives Месяц назад

Really a great informative video. I'd love to see your electroplating projects also. Thanks again for posting.

@andrewtreat7371 4 месяца назад

Wow this video is so oddly timed! I’ve been distilling sulfuric acid (with proper PPE and safety precautions mind you) over the past couple days. Weird! Very well done as always, Dr. Lithium.

@bobdole57 4 месяца назад

Its great you keep posting these videos around the same time I need to purify my acids

@chrisroberts3917 4 месяца назад

Not terrified, but a healthy respect. Edit: I think high levels of fear easily causes mistakes.

@EternalxFrost 2 месяца назад

But too much confidence as well

@imikla 4 месяца назад

Great video on it's own, and excellent follow up to the original! Definitely going to give some of these adjustments a try on my next run.

@9daywonda 4 месяца назад

Great to see you uploading on a fairly regular basis. Happy Easter man.

@olimp231 4 месяца назад

Hi. Thanks for another excellent video. I found on other channels this hint: use a few pieces of broken terracotta pot instead of a stir bar. It worked excellent for me and it's dirt cheap. I've tried other materials like broken glass but it was terrible. Terracotta is the best.

@mapple35 4 месяца назад

for some reason i thought you stopped posting? I watched you so much in early youtube around 2010, im glad your videos are showing up in my feed again!

@jennastephens1224 4 месяца назад

Thanks for the tip about the steel pan! I actually got some deep serving pans for free (they were very dented from heavy use in a resturant for years). If my setup fails, well, at least I know that any stuck on food that I didn't manage to scrub away will just burn away

@ScrapScience 4 месяца назад

Awesome! I've always been too scared to try this, and probably will continue to be for the forseeable future. Great to see how it's done though, especially on a scale like this.

@ransombot 4 месяца назад

PTFE tape decomposes at those temps and produces toxic gasses. You were doing it in a fume hood which is a must have for that. Something you didn't mention and is probably the least major thing doing that but worth noting as it's dangerous and starts at around 260. Even if it's stable and doesn't really have issues till about 400 that are noticable.

@MrMilliemight 4 месяца назад

I was wondering about that as well, but I have some doubts that the PTFE is getting to the full 337C since it's not in the main path of heat flow. Still it should be considered as a secondary hazard though and shouldn't be done around household pets since they're more sensitive to the gases and usual outside or in a fume hood rules apply.

@NurdRage 4 месяца назад

You're not wrong, PTFE degradation releases tiny amounts of toxic compounds. At these temperatures and quantities you're getting a few milligrams of it. While it is toxic, a few milligrams is not a lot (or else the millions of teflon cookware owners would be dead from all the times they accidentally burned their cookware). But let me tell you the much bigger issue of PTFE in boiling hot sulfuric acid: THE BOILING HOT SULFURIC ACID. A lot of these comments are missing the forest for the trees. The 800mL of boiling hot sulfuric acid can take off your flesh and eat you right to the bone... and the bone itself. The sulfuric acid and sulfur trioxide vapors are produced in gram quantities, not milligram, grams. And those vapors burn so bad that the 0.01% of fluorocarbon vapor will just be seasoning. Having good ventilation, containment procedures, and protection is required for the ACID. The PTFE safety just rolls into that. Worrying about the PTFE degradation with boiling sulfuric acid is like worrying about lead poisoning after being shot... yes, lead poisoning is not good... But you kinda have bigger issues like those bullet holes in you squirting blood. Fix that and you'll fix the lead poisoning issue automatically. Lay out and completely handle the boiling sulfuric acid issues... and the PTFE issues will be handled too.

@ransombot 4 месяца назад

@@MrMilliemight I agree. However, I doubt that one layer of PTFE tape is enough mass to elevate it to a significant secondary concern for humans. It might be a concern for birds and small rodents, but probably not for humans in a room, as opposed to a closet. Or done multiple times a day. That said, this is just my speculation, and not to be taken as advice. Nurd's protocol made it a non-issue. The real issue is when someone sees someone using PTFE at high temperatures on the internet and thinks it's ok and doesn't do their own due diligence. But I doubt they read the comments anyways. 🤷

@ransombot 4 месяца назад

@@leocurious9919 6:04 he talks about why he likes stirring. He then elaborates on it and talks more about that point at 16:25 and talked about why he used a PTFE one. It may change due to elevation but if you don't need to make your own it's more accessible.

@MrMilliemight 4 месяца назад

@@NurdRage fair enough 😂

@broregret Месяц назад

I remember getting a design constraint when i was designing equipment for the semiconductor industry that said my containment should hold against all spills for at least 5 minutes to allow building evacuation. Over the next month, I became educated as to how difficult this requirement was to meet. And that's how i became a hobby chemist. 🙂

@ianbottom7396 4 месяца назад

Just spent nearly a month working on a sulphuric acid plant, not sure exactly it’s product capacity but they export 3000 metric tonnes daily. Fortunately the risks during the shutdown are much lower although there were still repairs inside in several of the reaction vessels and also the replacement of the Vanadium Pentoxide catalyst in the converter. The suits and decontamination requirements for those working inside seemed very thorough, fortunately that didn’t include me 😂. I’ve always been careful with the small quantities I keep but this experience has only increased my awareness and I’m quite happy to leave distillation of it to someone else 😂. Also thought I’d mention the product that is used in the event of inadvertent skin or eye contact is called Diphoterene apparently it is very effective at neutralising acid (and alkali) and I was told will also neutralise the nasty oleum residues that I believe is more dangerous than the acid 😳

@nunyabisnass1141 4 месяца назад

What I like most about this channel is that you explain the safety concerns pretty well. As an amateur/hobby chemist, distilling sulfuric acid is not something I will ever attempt due to the safety concerns. Not will I ever work with chromates or mercury.

@neutronpcxt372 4 месяца назад

It's very nice that you're revisiting this. Regarding electroplating, do you think it'll ever be possible for you to make a video on electroplating copper on aluminium? It's one of the holy grails of electroplating.

@NurdRage 4 месяца назад

Electroplating? like solid aluminum onto a solid part at room or slightly warm temperature? or just making aluminum by electrolysis? which comes out as a liquid since the electrolyte is molten hot? The two processes require radically different approaches. it can be done, but i don't think by amateur means.

@neutronpcxt372 4 месяца назад

@@NurdRage Sorry if I wasn't very clear. I meant plating a metal onto an aluminium sheet like copper. Copper plating on aluminium is a notoriously difficult thing to do outside of industrial processes and a lot of them are hidden by trade secrets.

@flomojo2u 4 месяца назад

@neutronpcxt372 Plating metals directly onto aluminum is tough, so usually a basic zincate pre-plating step is employed, then copper, then whatever metal you're interested in, assuming it's not copper. You must use alkaline plating solutions when working with aluminum, which unfortunately means cy*nide copper plating vs the more accessible acid plating solutions. There are many examples of how to plate aluminum out there, including on YT, so a few searches help. Electroplating/electrodeposition can be a complicated process once you get away from working with vinegar and salt solutions, so you need to do some work to understand what's going on, as often you'll get unusable results due to stresses or other issues. It also often involves highly toxic and carcinogenic metal salts, so an awareness of how to treat them AND dispose of them is critical, ie don't dump them down the drain.

@neutronpcxt372 4 месяца назад

@@flomojo2u Yeah, I know about all of this. I found a paper which I managed to replicate and get to plating on aluminium. The issue is that importing the necessary chemical was expensive and therefore not available to the general public. To be fair, that was done years ago when I wasn't nearly as good as chemistry and when I had rather... suboptimal plating equipment. I now have a MMO electrode and large pyrolitic graphite sheets which make plating so much easier and simpler. One surprising thing for pyrolitic graphite is that it seems to be more chemically stable than normal graphite, which is weird. I haven't seen this in litterature (I am likely blind).

@5467nick 4 месяца назад

@@neutronpcxt372 Pyrolitic graphite has stronger bonding between the graphene sheets than normal graphite, so they're less prone to breaking apart. Even better is amorphous carbon or "glassy" carbon, though it's not as easy to make. Do you have a specific project in mind with trying to plate copper onto aluminum? I've never tried electroplating anything onto aluminum.

@erikhartwig6366 4 месяца назад

OMFG! that bump @3:21 made me flinch!!!

@kaboom4679 4 месяца назад

That was a rare moment . All the voices yelled " NOPE " at the same exact moment .

@gtb81. 3 месяца назад

This makes me glad i was able to just order some online, had to get some for a soda acid fire extinguisher recharge.

@NicholasA231 3 месяца назад

I think I recognize that hotplate. 🙂 I'm glad it's getting put to good use!

@NurdRage 3 месяца назад

Thanks man 😊

@ElectronPower 4 месяца назад

As always, great video! One thing I'd like to point out, regarding the use of PTFE tape is, that it can start decomposing and give off toxic fumes at the temperatures of boiling sulfuric acid. How much and whether that would pose a threat or not, I don't know, but the rate of decomposition increases significantly, above around the b.p. of H2SO4.

@DangerousLab 4 месяца назад

I always have concerns about using PTFE tape and a stir bar for this experiment as 337C is well above the recommended usage for it, it's good to see that it actually works to an extent, I will definitely try using PFTE tape as a joint seal as conc. sulfuric acid as grease is a little bit unreliable. On a side note, I have tried broken clay pot pieces that seem to work best as makeshift boiling chips, while broken glass is the worst as I think it induces more superheating spots in the flask.

@ethanmye-rs 4 месяца назад

Man, I tried this a while ago, and managing the heat is difficult. I used a mantle with a stir bar directly below. Even with stiring, I still saw bumping issues. Did not know about drain cleaner being g a waste product, very interesting!

@charlesurrea1451 4 месяца назад

I use the same type of bin on doing this process as well. However, I like to walk around a bit so I line the bottom with calcium carbonate to give it a fighting chance if I do get a boil over

@jackmclane1826 4 месяца назад

I don't have a stirrer at this temps, so I put the whole setup on a shaky table with a magnetic actuator (a big solenoid switched by a relay controlled by arduino to tune it to resonance). It swirled around the hot acid very nicely and prevented bumping. But you need clamps on your setup, or it will wiggle itself apart. I also didn't know stir bars would survive 350°C.

@jamisontaylor878 4 месяца назад

Love the videos as always! And I understand that some people can't get 98% sulfuric acid . But 20.00 a bottle for cup of acid for about six hours labor lol and 89.00 for four cups is only good math without all that heat dangerous fumes/deadly fumes. Love the tape idea thank you😊

@DonnyHooterHoot 4 месяца назад

Great video! You have, IMHO, really improved your cadence and pronunciation. Very nice.

@-Chooka 4 месяца назад

I use thread tape for everything with a joint, it has always worked well.

@samham3408 4 месяца назад

Churp thanks... the deats r great.

@TruthresonatorWWJD 2 месяца назад

I have to take chemistry, and I need help understanding chemistry, good job with the video

@wvcruffler123 3 месяца назад

Love the channel. Been trying to make antimony trichloride from antimony oxide (because Antimony III Cl is expensive as hell). Thus far I am still getting too much antimony oxychloride. My guess is distillation is the answer but I haven’t bought that bit of chemistry set yet!

@kazeswift7412 4 месяца назад

good job

@Mr-yf5tl 4 месяца назад

Thank you for what you provided, and I hope for the ammonium perchlorate episode

@mikepettengill2706 4 месяца назад

You are brave!

@borhex 4 месяца назад

I was fascinated when introduced to SARU - Spent Acid Regeneration Unit, erection of all components was just about to be complete, and we are to commission the unit... the spent acid comes in the form H2SO3, we burn it to get SO2 and catalytic react to get SO3, participate the soot and then run the gas through a glass tube with water dripping down the walls and absorbing the SO3 to become H2SO4... I realised then that it is actually, as pointed out, a solution of sulfur trioxide in water up to 98% concentration. (Of course I pored it on sugar to get the black worm of doom...I don't work there anymore)

@mackdog3270 4 месяца назад

Honestly, I'm not a chemist, beyond the everyday chemistry most people perform. It kind of surprises me that more chemists don't use teflon tape. You can get it anywhere and it's inert (I think) to most chemicals and it has a reasonably high temperature range. Personally, I use it for all sorts of things outside of standard plumbing and it works well.

@greenleaf6513 4 месяца назад

finally u comeback

@superdupergrover9857 4 месяца назад

Get the highest quality PTFE tape available. Not just for the lab, but in general. It's still cheap, and it's so important in it's use that it makes sense to do so. Generally, you want to look for the yellow gas line rated tape. It is very thick, so you need far less wraps than cheaper tapes. It contains a variety of preservatives and anti-corrosive agents as well.

@parcydwr 4 месяца назад

This is a great video. I am wondering if you could use hot water as the cooling water to get less thermal stresses in the distillation tube?... and how hot could that water be?

@djdrack4681 4 месяца назад

great video as always...The tissue method is classic 'tried and true'. How can you store pure sulphuric acid on molecular sieves w/o the acid destroying the sieves? I've always found that to be interesting.

@fireworkstarter 4 месяца назад

Its probaly a made of a ceramic thats more favorable than the sulphates it can make and so wont react to form anything.

@Steevo69 4 месяца назад

Ace hardware sells a double bagged sulphuric acid drain cleaner at 90% and 10% water. Its double bagged, for good reason. I needed some to clean drains but the double bag caused it to slip from my hand, about 6 Oz spilled on the ground and started interacting with the calcium based rocks in asphalt and heating the asphalt binder. I had a leaking gallon jug of high grade sulphuric acid with the bag half full, I put it into the bed of my pickup truck. It ate the white paint off and the primer, about 12 Oz escaped. I made 5 gallons of baking soda water that was oversaturated, the sulphuric acid went directly into a 5 gallon bucket that was clean and empty, with a bare hand. 5 minutes on my hand and it only felt like a tingle and the skin wasn't damaged. I rinsed the bed of my pickup with a gallon of my saturated water and I drove it back to the pavement it was on, it bubbled a lot and about 3 gallons and it was done and left a light mark on the asphalt.

@Enjoymentboy 4 месяца назад

For some reason I take comfort in knowing that NurdRage uses the exact same drain cleaner acid as I do. :)

@64Pete 4 месяца назад

I'm curious what metal you will be plating with. Looking forward to the process anywho. ✌🇦🇺

@demandred1957 4 месяца назад

Nice!!

@RedDogForge 4 месяца назад

you're by far the best chemistry demonstrator on youtube. thank you for emphasizing safety practices. as an aside id love to see your take on metal chemistry like chromium. also really looking forward to your metal etching project that your working on.

@woofy1988 4 месяца назад

Man, I've seen teflon tape used for so many sealing applications now that I'm convinced it can be used to seal anything

@TheEsseboy 4 месяца назад

Too bad it is a forever chemical, I collect it in a special marked container for when I need to get rid of it, shouldn't be thrown into regular trash :( Such great polymer, why are they always bad somehow )

@seansingh4421 4 месяца назад

A new NurdRage video ? My day (fck even week) got a lot better

@AxGxP 4 месяца назад

What about distillation under vacuum? May by it will be not so dangerous, by lowering temperature. How about quality of it?

@drmarine1771 4 месяца назад

Legend. Best chanel. Don't know what it is . I'm fascinated with acids.

@BigMyz 4 месяца назад

So others use PTFE tape instead of messy grease? Awesome!

@ninogomes6721 4 месяца назад

Благодарим ви!

@NurdRage 4 месяца назад

thank you so much!

@Zulu87351 4 месяца назад

Would definitely like to see you recover those base metal sulfate salts from your copper nitrate nitric acid recovery video.

@MathewTitus 4 месяца назад

Using Sulphic Acid might be a great way of making charcoal without having to burn anything. It also is a great way to keep the cellular structure intact enough to make super-capacitors after the carbon is changed into graphene.

@yassersalah81 2 месяца назад

Can we use a vacuum in the case with the short path condenser apparatus?

@JamesJohnson-kw9gh 4 месяца назад

Havent seen your videos in awhile does this mean your back?

@anotheruser9876 4 месяца назад

Interesting video. Question, how do you clean the glassware afterwards, considering to add acid to the water and not the other way around?

@NurdRage 4 месяца назад

First I dump the residue into water, a little at a time. Then once the flask is empty, I can pour water into it. There is so little that pouring water changes the temperature very little.

@shaunkarr5641 4 месяца назад

It's none of my business and haven't finished the entire video but was that ptfe disintegrating at 1:20 or distillate? This is awesome

@jimmystikx 4 месяца назад

Would ptfe pipe dope work, like the Blue Devil pipe dope?

@alch3myau 4 месяца назад

How many hours did that take? Need a stop watch!

@Teukka72 4 месяца назад

Potential research topic for lab techniques: Are there patterns of wrapping the PTFE tape that are more likely to be air/vapor/gas tight than others?

@michaeldomansky8497 3 месяца назад

Pondering, can the freeze drying method be useful for this??

@anthonycabrera6318 4 месяца назад

Can you disolve copper or silver in that concentraded acid?? Never see that reeaction

@jacobcoates8761 4 месяца назад

Bro that sulfuric acid blow out was wild

@chemicallust77 4 месяца назад

I'd like to see this used for electroplating

@ferminenriquezamorapineda2832 4 месяца назад

In my region it's pretty hard to get sulfuric acid, but pure sulfur is cheap and available, so I'm thinking of making the acid by burning the sulfur in a glass tube or vial, and pumping air or even ozone to further oxidize the sulfur dioxide to trioxide, and finally dissolving it in water by bubbling with some porous glass stone

@charlesurrea1451 4 месяца назад

Is there such thing as a boiling flask with laser etched nucleation points?

@DJTomEGun 4 месяца назад

After purification, what is the preferred method of disposal of any waste product left behind from the drain cleaner? Can it just be washed with e.g. some alconox and poured down the drain (I mean, it was originally drain cleaner, so I assume its safe to just...send to the sewer?)

@SharpAssKnittingNeedles 4 месяца назад

Wow all my favorite creators are uploading today! Best Easter in years 🥳

@WindowsTutorial772 3 месяца назад

Make Zinc Powder by Electrolysis : Q. for aluminum, same process can be done with sodium aluminate ??

@JoshuaPalley 4 месяца назад

It looked like the transition from water to sulfuric acid could be seen with a color change of the PTFE tape in the ground glass joint. Was that just caused by a temperature change?

@nazmulislam6300 4 месяца назад

nice ❤️

@AndrewMerts 4 месяца назад

One important thing to watch out for with the PTFE tape. Don't let it get above 250C or it'll start decomposing and releasing the notoriously toxic PTFE fumes. If it's in a fume hood you'd probably be fine but I don't think I'd want to be handling the tape afterwards and any pet birds in the house if it's an amateur setting are particularly sensitive to it.

@urgtuiop5455 4 месяца назад

Would it be practical to deliberately add water continuously to the drain cleaner whilst distilling so as to remove a purified but dilute acid. Then boil off the water. Might it help keep overall time spent at high temperatures down.

@TheEsseboy 4 месяца назад

Adding water to boiling acid is not a safe idea, it will make it flash boil and give you dangerous trouble.

@Max_Chooch 4 месяца назад

Could the gasses be safely vented through a flaring torch? Like, a bunsen burner with a secondary inlet that would guide all the fumes through the flame, would that help decompose them into less harmful byproducts?

@TheEsseboy 4 месяца назад

No, there should be a scrubber in the fumehood. Suplhuric acid needs water and a base to neutralize, not heat.

@Refertech101 4 месяца назад

I save my tail ends to make Sulfur trioxide, I oft noticed crystals grow in it once I had a good deal of them collected

@thierrycombot7110 3 месяца назад

How the avoid bumps to shoot in the reciever flask? Would a larger flask avoid/limits this? Is it possible that a bump make explode the erlenmeyer? Also, 337C is quite high, we can reduce this temperature by vacuum distillation. Would it be more secure to make this distillation under vacuum around 200C?

@hanleypc 4 месяца назад

What stir bar do you use that withstands 330 deg C?

@therealjammit 4 месяца назад

FYI they sell a PTFE plumbers thread sealant. It's the "liquid" form of PTFE tape.

@jimsvideos7201 4 месяца назад

The earlier apparatus having a sneeze was good for a genuine flinch.

@tahallium 4 месяца назад

does the battery acid unopened contain any ions? like lead? or is it good for analytical chemistry

@NurdRage 4 месяца назад

It should be good. Sometimes there are additives, but those should be listed somewhere. Otherwise it should be pure.

@kaboom4679 4 месяца назад

Battery manufacturers have very stringent requirements for the acid they use , and require very low levels of metal ion contaminates . They will absolutely reject any prospective seller that even has periodic , random , issues with their acid testing out of spec , even if individual batches DO meet the spec . This often happens in large process capture of sulphuric acid as a byproduct of ore smelting , which typically employ electrolytic anti corrosion measures on their bulk storage tanks . Inconsistencies caused by a fault or failure will tend to produce out of spec ( for battery grade acid ) levels of nickel and chromium contamination in the acid , and , it can be a major PIA to identify the source / cause , if they do not have any monitoring / data logging of their anti corrosion systems . Even when they do it is often the last thing they think to check when this problem arises .

@Dowhap 4 месяца назад

What do you think about adding few grains of cat litter to form nucleation points and prevent bumping? It's works very well for me, since I don't have a magnetic stirrer hot plate :) Edit: Also I dont find so much information of what happend when heating a solution of drain cleaner H2SO4 and few milliliters of H2O2 for oxydize the impurities. I thinks that the formation of H2SO5 decomposed to H2SO4. This is my low risk method for purification of drain cleaner H2SO4.