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Re: Super-dry Ethanol.
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NWC
Jan 17, 2007, 5:29:21 AM1/17/07
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would you use Mg turnings, powder or ribbon? does it matter?
"Dave Munzuno" <mun...@charter.net> wrote in message
news:d6hepe$a7c$1...@ikaria.belnet.be...
> "Peter Jason" <P...@PJ.com.nz> wrote in message
> news:d6ck6b$as$1...@ikaria.belnet.be...
>> Is it possible to produce this by azeotropic extraction of water traces
> with
>> hexane/heptane?
>
> Actually the benzene/ethanol/water azeotrope is the most commonly used.
> But
> a much better technique is a to take 1 L of ethanol and add 25 g of
> magnesium metal. Reflux until the metal is consumed (add a few drops of
> chloroform if it doesn't start to get cloudy). It will take a good 24 h
> to
> convert the metal to magnesium ethoxide.
>
> Then just distill the ethanol off. It will be very dry.
>
> Dave
>
NWC
Jan 17, 2007, 5:29:42 AM1/17/07
to
after distilling over CaO, right?
<dudle...@gmail.com> wrote in message
news:d6hen4$a6c$1...@ikaria.belnet.be...
> Drying over 4 angstrom molecular sieves is the way to go.
<dudle...@gmail.com> wrote in message
news:d6hen4$a6c$1...@ikaria.belnet.be...
> Drying over 4 angstrom molecular sieves is the way to go.
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