White Yeti
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Leeching H2O2 from sodium percarbonate.
I've been thinking about experimenting with peracetic acid and explore its properties, but in order to make some, I need large amounts of fairly
concentrated H2O2.
So, I was wondering how could I separate the hydrogen peroxide from the sodium carbonate in sodium percarbonate and subsequently react it with glacial
acetic acid and H2SO4 to make appreciable amounts of peracetic acid.
"Ja, Kalzium, das ist alles!" -Otto Loewi
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Adas
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You can't get H2O2 from sodium percarbonate, because it spontaneously decomposes (Na2CO3 is basic). You can use 3% H2O2 and distill it at lower
pressure, or you can evaporate the water, but this takes too much time.
Rest In Pieces!
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hissingnoise
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| Quote: | | You can use 3% H2O2 and distill it at lower pressure, or you can evaporate the water, but this takes too much time. |
Much easier to buy 35% on ebay - prices have shot up steeply of late, I notice though.
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White Yeti
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So, 35% would do the trick for this kind of synthesis? I've tried concentrating 3% before up to what I think is about 10% concentration. Would that do
the trick as well? I'd rather distil the 3% than buy some 35% at the moment.
"Ja, Kalzium, das ist alles!" -Otto Loewi
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Bot0nist
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If all you need is 10% it is really simple to get it from 3%. Check the search engine. Even without the ability to distill under reduced pressure the
highly available and cheap 3% H<sub>2</sub>O<sub>2</sub> can be concentrated with minimal effort and equipment, IMO.
Here's two.
http://www.sciencemadness.org/talk/viewthread.php?tid=15881
http://www.sciencemadness.org/talk/viewthread.php?tid=16726
[Edited on 18-12-2011 by Bot0nist]
U.T.F.S.E. and learn the joys of autodidacticism!
Don't judge each day only by the harvest you reap, but also by the seeds you sow.
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White Yeti
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Quote: Originally posted by Bot0nist  | | If all you need is 10% it is really simple to get it from 3%. Check the search engine. Even without the ability to distill under reduced pressure the
highly available and cheap 3% H<sub>2</sub>O<sub>2</sub> can be concentrated with minimal effort and equipment, IMO.
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That's the thing, I don't know how concentrated the peroxide has to be in order for this synthesis to work well. Theoretically, 3% would work, but my
product would be incredibly dilute. I wish I could get 35%, but I don't have access to it at the moment. All I have is sodium percarbonate and 3%
H2O2.
"Ja, Kalzium, das ist alles!" -Otto Loewi
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hissingnoise
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| Quote: | | I wish I could get 35%, but I don't have access to it at the moment. |
http://www.ebay.co.uk/itm/500ml-Hydrogen-Peroxide-35-Technic...
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