Re: ORGLIST: molecular sieves

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From: Alexey Gromov (alexey.gromov$##$univie.ac.at)
Date: Wed Nov 26 2008 - 12:56:42 EST


I think there is no answer on this question. According to one
investigation, for example, MeOH drying over powdered MS 3A gives much
worse results than over beads. At the same time, for EtOH and t-BuOH
using powder gives substantially superior results:
http://chemknowhow.com/forum/viewtopic.php?p=562#562
But in general, what i have seen people use equally often powder (one
has to crash beads first and then activate the powder, not vise
versa!) and beads.
I personally prefer powder, but have never studied the difference for
my reactions.

About some issues with mol. sieves see here:
http://chemknowhow.com/forum/viewtopic.php?t=124

Best regards,
Alexexy
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