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#Post#: 1061--------------------------------------------------
Extraction of iodine
DIR By: LikeCrazy
Date: November 6, 2012, 9:10 pm
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How do you extract pure iodine from tincture of iodine? I wanna
try this?
#Post#: 1068--------------------------------------------------
Re: Extraction of iodine
DIR By: Shiva
Date: November 8, 2012, 12:09 am
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By heating strongly. I did it once. You can see the faint
beautiful purple vapors of Iodine liberating which can be
condensed to a bluish black crystals.
#Post#: 1082--------------------------------------------------
Re: Extraction of iodine
DIR By: Michel
Date: November 9, 2012, 12:02 pm
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Just some addition here...
If i'm remembering the composition of Iodine tincture correctly,
it should contain at least 70% ethanol by volume, and an even
higher % by mass. With some free I2 and NaI (or maybe KI). Most
of the free Iodine combines with I- to form the triiodate ion
I3-
hence titrating with some Oxidizing agent should do the trick.
You can use HClO or maybe H2O2 to oxidize the I3- to I2, and any
Iodide ion will be converted to free Iodine as well. This is
simply to maximize yield.
Really I do not see you recovering much I2 from Iodine tincture.
You will have to purchase many bottles of the stuff to get any
substantial yield.
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