madscientist
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Purification of acetone peroxide
I thought it would be an interesting challenge to attempt to prepare reasonably pure trimeric acetone peroxide. I have read in chemistry journals that
preparing acetone peroxide from acetone, hydrogen peroxide, and an inorganic acid at 0C yields a product that is 90% trimeric acetone peroxide, and
10% dimeric acetone peroxide. Dimeric acetone peroxide, contrary to popular belief, is not identical in composition to trimeric acetone peroxide with
the exception of it being a dimer. The structure of dimeric acetone peroxide is as follows:
I believe that dimeric acetone peroxide would be weakly acidic. And so, here is my proposed method for preparing straight trimeric acetone peroxide:
Place 3.2g of acetone peroxide in 50mL of ethanol. Add 2g of NaOH. Allow it to react for several minutes. Then, allow all of the ethanol to evaporate.
Pour 50mL of toluene onto the crystals (I'm guessing that the sodium salt of dimeric acetone peroxide would be *extremely* unstable - be careful if
you try this!), and filter. Allow the filtered toluene solution of trimeric acetone peroxide to evaporate. The crystals remaining should be
high-purity trimeric acetone peroxide.
The sodium salt of dimeric acetone peroxide would not be soluble in toluene because it would be ionic. The excess NaOH would not dissolve in the
toluene either, because it is also ionic. Trimeric acetone peroxide, however, is non-polar, and so dissolves readily in toluene.
I have added this to my elephantine to-do list.  Results coming someday.
I weep at the sight of flaming acetic anhydride.
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raistlin
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??
My teacher has a slight idea as to what might be able to make it a slightly more stable compound. Ill e-mail the info as soon as I can, or I will
just post it on the board.....
Raistlin
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PHILOU Zrealone
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Peroxydes are unstable in alkaline media!
Then to stabilise H2O2 it is not rare to see in the ingredient list:
H3PO4, CCl3-CO2H, H2SO4 what are strong acids!
If you treat CTAP with NaOH, you will simply loose your batch!
Why would HO-C(CH3)2-O-O-C(CH3)2-OH be acidic?
Why wouldn't it be (CH3)2C(-O-O-)2C(CH3)2?
Since aceton peroxyde formation, cyclisation, polymerisation is catalysed by strong acids like HCl, H2SO4; what do you expect from a strong base, will
it reverse the reaction or help it?
Don't tell me I know the answers! 
PH Z
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Adas
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I strongly disagree. Few days ago, I put HOT! NaOH solution on TATP. I hoped it will destroy lower peroxides, but it didn't, all the AP was
undamaged...
And, madscientist, your structure is incorrect, on one side must be just -OH group, not -OOH at both sides for a simple reason: Upon dehydration,
there would be -OOO- group (impossible)
[Edited on 26-11-2011 by Adas]
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KemiRockarFett
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Separate the dimer from the trimer by using their different sublimation rate. I think this is mentioned in Federof...
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