ISCGora
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Concentrating H2O2
I know many people use boiling off water method which is not really ideal, but I've known the method of freezing(freeze the water that is contained in
3%solution and you get a block of ice and H2O2) for a while but wasn't sure what was the final concentration on H2O2.
Thanks!
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Molecular Manipulations
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Boiling it down is better than freezing it out as far as yids are concerned. I think 15% w/w is the best you can get from freezing.
-The manipulator
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BromicAcid
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Search
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And search some more. Probably one of the top 15 topics covered on this forum involves ways to concentrate peroxide.
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hissingnoise
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For hydrogen peroxide of 35% conc., I'm inclined to follow the path of least resistance!
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vmelkon
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Personally, I tried with evaporating instead of boiling. I would heat it to 80 to 90 C and let it sit until cool and repeat. Density went from 1.00
g/cm3 to 1.07 / 1.08.
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DFliyerz
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I just stuck a bottle of 3% hydrogen peroxide in the freezer for a while, and I actually got a small flow of liquid as soon as I took it out of the
freezer. It certainly seemed pretty viscous compared to water, and when added to a beaker containing 31.45% hydrochloric acid and some copper it
heated up and reacted the copper pretty quickly.
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ISCGora
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Thanks for info.Yesterday I used two batches of 1L(3%)
First one i used evaporation and after I tested it it was very near 10M.Which is pretty good
Second one I used freezing didn't work out so well it was something like 4M which is far worst.
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