BauArf56
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potassium persulfate purification help?
i found some relatively cheap tablets for cleaning dentures. Here are ingredients:
sodium bicarbonate 26 - 28 %
potassium monopersulfate 24 - 26 % (can't figure out if it refers to potassium persulfate K2S2O8 or to potassium peroxymonosulfate KHSO5)
anhydrous citric acid 7 - 9 %
sodium carbonate 10 - 12 %
sodium perborate 4 - 6 %
sodium percarbonate 3 - 5 %
other stuff in low concentration (blue dye, magnesium sterate, sodium lauryl sulfate and other)
Now how can i extract potassium persulfate? putting it in water would turn citric acid and sodium bicarbonate in sodium citrate, but i don't really
know how to separate it then. Any help will be much appreciated.
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woelen
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Monopersulfate is SO5(2-) (or HSO5(-)).
This does not sound very useful. I would not spend money on it. You can easily buy pure (NH4)2S2O8 or Na2S2O8, e.g. as etching agent in electronics
shops. You can also buy nearly 100% oxone as swimming pool oxygenator (replacement for chlorine, for people who are allergic for chlorine,
hypochlorite, or cyanuric acid). IIRC, oxone is a double salt of KHSO5, K2SO5, and KHSO4. It does not contain S2O8(2-).
That mix, you mention in your post will not be stable in solution. The citric acid will be oxidized.
[Edited on 8-10-21 by woelen]
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macckone
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leisure time renew. available all over the US.
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