Elementary Productions: Synthesis of Sulfur Trioxide

[giuliodice1]

Un bel metodo per produrre anidride solforica!, molto sbrigativo!

Un altro buon metodo è per pirolisi (cioè riscaldano) del bisolfato di potassio prima a 315°C per sottrarre acqua, poi a 460°C per decomporre il pirosolfato di potassio in solfato di potassio e anidride solforica.

[b1912313]

Is it safe to heat the flask directly on fire? Won't it just break apart?

[gogo311]

@b1912313 It depends on glass quality.

[themert123456]

Hello,

i have Sodium persulfate. Can i make it also with it?

[anuraganimax]

SEXY

[Sviolinist]

Ah yes- --- the lubricants has mucked things up. Well, I do not know if parafilm or teflon will work here. Experiment! Lol. Don't you love being a scientist? I knew something was getting carbonized. Do you think applying vacuum and hooking up a drying filter to the system might cut down on the sulfuric acid content of things? Either way, you are doing splendid work here.

[Sviolinist]

I've found Anhydrous Magnesium Sulfate and Sodium Persulfate to be quite good. The way you are reacting these things in the video seems brutal. I believe the best way to do this sort of reaction is to 1st grind the reactants together into a uniform mixture, and then line the reactants into the flask so that the reaction takes place in a streamlined manner. You seem to have just thrown stuff in a flask... thus insuring that rxns are taking place at different paces. Hence, acid is mucking it up.

[Santrielus]

Sulfur Trioxide -> Sulfur Chloride -> Sulfur Ethylene -> Mustard gas :P

[adriiPortillo]

@Santrielus. How about this one?

Chlorine + Sulfur --> Sulfur dichloride.

Ethylene + Sulfur dichloride ---> Sulfur mustard.

Remember mustard gas is very inespecific to all alquilating agents, including the sulfurs and nitrogen mustards. I'm not sure but it haves some to do with "onion", ammonium, sulfonium, things like that.

[mrgregorio9229]

can i just heat a sample of concentrated sulfuric acid to obtain sulfur trioxide

[adriiPortillo]

Only use for this would be to any other of the synthesis involving sulhpur trioxide, but not to make sulphuric acid.

[zasx20]

isnt it kindof pointless to reverse the reaction that is use to make sulfuric acid?

it iis still a good video!

[Peterditaa]

no its not

this is not about making sulfuric acid, but to make sulfuric acid with dissolved sulfur trioxide

water does react with SO3 to form H2SO4

but H2SO4 does react with it to H2S2O7. It could also just physically dissolve the SO3, this give the acid an extra strengh and purity.

[AreYouWetYet]

mmm, smells good!

[dafioso]

Could ammonium persulfate be a substitute to potassium persulfate?

[YdeckW]

Certainly.

[11to]

what is the difference of SO3 and oleum?

[mabakken]

Oleum is SO3 dissolved in Sulfuric acid.

SO3 is simply the isolated anhydride of Sulfuric acid. =)

[Mrluisao17]

dude how pure was the final product??

[Mrluisao17]

could i use sodium metabisulfate instead of potassium persulfate?

[Assi2004]

oh and its like this:

Me2S2O8 --> Me2S2O7 + O (forming some ozone)

and than Me2S2O7 --> Me2SO4 + SO3

where Me is eg. Na or K

[zasx20]

oleum is any highly concentraited sulfur coumpound right?

[mabakken]

Oleum is basically Sulfuric acid containing an excessive amount of Sulfur Trioxide. =)

[maxyevs]

Its interesting whenever I do an experiment with persulfate, it always seems to surrender a sulfate radical, i.e.

Na2S2O8 + Fe> Na2SO4 + FeSO4

I know this because i got a green result which cannot be iron sulfide or iron oxide but rather has to be iron sulfate.

Maybe the sulfate radical quickly decomposed into sulfur trioxide and oxygen

2SO4 > 2SO3 + O2

If you need help finding where to buy persulfates, try an electronics store like Fry's theyre used for copper etching.

[pyr0pr0]

I have some question for this synthesis:

1. what are the ratio

2.did this distillation will attack my glassware (kantu distillation kit from ebay)

3.what is the yeild of this reaction

4. at wich temperature the reaction occurs

thx

[megafeltch]

could i use sodium bisulfite

[evsonjunior]

K2S2O7 = K2O + 2SO3

or K2S2O7 = K2SO4 + SO3?

[evsonjunior]

At the end of reaction you made potassium sulfate?

Or potassium oxide?

[Traly0]

potassium peroxydisulfate and Amonium peroxydisulfate are used for etching circuit boards. and does what happens if the sulfuric acid isnt that concentrated

[megafeltch]

do you know where i can buy some

[nirvanafan833]

couldn't you just heat copper sulfate to about 650 degrees celcius and get the sulfur trioxide off that? leaving copper oxide? sounds cheaper...

[tTatmosT]

nice vid but one question, I want to be sure I'm not wrong...

if u inhale sulfur trioxide in a gaseos (I can't spell the word) state u will die or sufer great burns to ur lungs right?

[mabakken]

Depends on how much Sulfur Trioxide we're talking about, but you would for sure suffer great burns, and most likely a very unpleasant death!

[tTatmosT]

so I was right! because a guy on youtube said he made SO3 from flash powder and inhaled cubic meters of it and said he could taste it making H2SO4 in his mouth... but I told him he was crazy...

[Entress]

Well, next time you try this:

First of all, clean all glassware with acetone twice and let it dry. Use only a minimum of lubricant, preferably silicon grease, even better is a drop of 85% H3PO4 (its viscosity makes it a suitable "lubricant", you have to clean the glass joints immediately after procedure however, to prevent "freezing").

[Sebbass69]

FP791, you're completely wrong.....

The only chemicals in that are restricted in the States are DEA List I chemicals, and a few list II. Even so, they can be found - as for nitrates, they are ridiculously easy to obtain without any special permits. And nitric acid can easily be bought at 70% concentration in for around $35 a bottle. And what is this garbage about NaOH? NaOH is laughably easy to find at very high purity - it plays no chemical part in making meth - it's not on any of 4 DEA Lists

[lukepalmer8]

well that was great but were the hell did you get potassium peroxydisulfate?

[mabakken]

Thank you very much!

I got the Potassium Perox. disulf. from a chemistry supplier...it isn't that hard to get a hold of, is it?

[FP791]

WRONG.

North America restricts 99% of the chemicals you're using. Even pure basic chemicals (NaOH) are restricted as they're used in crystal meth synthesis. Nitric acid is restricted and most nitrates are also restricted.

[mabakken]

Again...the world of Chemistry does NOT revolve around the laws and limitations for PRIVATE citizens in North- America.

NaOH is still sold in the US as Drain Opener, although maybe not for long.

Ammonium Nitrate can still be bought in Instant Cold Packs, as well as a fertilizer.

The government is trying to ban these substances, but they know they can't due to their use in plumming and agriculture.

[darkcurrent]

Yes, they are available in the supermarkets under different names, eg. salt peter or potash for KNO3 but they are not pure.

quick example, would you drink laboratory ethanol? No, because they're denatured. Same thing when it's used as drain cleaner and instant cold pack. They've got a lot of impurities and must be purified. In canada even water usage is monitored to prevent grow ops. This obviously limits reflux times and distillation times. (I'm ochemist)

[nirvanafan833]

tell the australian government that they can't do that then, because it's happened here. all nitrates have been banned unless you have a license, or if you look up auschems you can get KNO3, but we still get sodium hydroxide etc-and I believe that's only used as a catalyst in drug production, so there are worse things to worry about really. but it is hard to get chems in some places.

[y2k042000]

that's a great experiment...but will the whole quitfit system become scrap after the exp.?

[mabakken]

Thank you.

No, the carbonation has no effect when it comes to re-use.

[y2k042000]

Can I use Ammonium persulfate instand of Potassium persulfate?

[mabakken]

That should not be a problem. I would just be a bit more careful when heating it, as to ensure that it does not decompose into Ammonia gas.

[Sebbass69]

what concentration of sulfuric acid is needed to catalyze the decomposition of the persulfate (could it be decomposed without the acid)?? And, could you add the sulfur trioxide to water to gain back the sulfuric acid? And how do you know when to turn up the heat in order to melt the persulfate?

[differens]

nice bunsen burner

[derkozten]

Hey, don't be ashamed ;)

Sometimes, shit just happens :S

[mabakken]

I second that! ;)

[Basco36]

cool.

[rustytama]

Wonderful. :)