12thealchemist
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Constructing a Hershberg stirrer
I've just started a PhD in a new group, and we want to construct a Hershberg stirrer for making sodium sand. However, my PI has been unable to find
any information regarding the construction of one. On this forum, there is this post, with associated paper. However, we're after the unmodified version if possible. Does anyone know anything about the construction of
Hershberg stirrers?
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Sulaiman
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This is the first I've heard of a Hershberg stirrer so I can't help,
but
I use one of these https://www.ebay.co.uk/itm/PTFE-Mixer-Stirrer-Shaft-Stirring...
with one of these https://www.ebay.co.uk/itm/PTFE-Stopper-Plug-for-PTFE-Stirri...
They are very sturdy and can mix almost anything.
The pure ptfe blades are hinged for entry via a narrow neck,
and are easy to shape with a knife or to drill holes through.
The seal is a single rubber O-ring and I've not tried the seal against a vacuum so I can't comment on that.
CAUTION : Hobby Chemist, not Professional or even Amateur
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Praxichys
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Just watch your hair!
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bobm4360
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http://www.orgsyn.org/demo.aspx?prep=cv2p0116#Note57N1
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Steam
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Here is a quick paper I pulled from ACS. Seems simple enough to construct- especially if you use a stainless shaft instead of glass.
Attachment: modifiedhershberg.pdf (445kB)
This file has been downloaded 466 times
DISCLAIMER: The information in this post is provided for general informational purposes only and may not reflect the current law in your jurisdiction.
No information contained in this post should be construed as legal advice from the individual author, nor is it intended to be a substitute for legal
counsel on any subject matter. No reader of this post should act or refrain from acting on the basis of any information included in, or accessible
through, this post without seeking the appropriate legal or other professional advice on the particular facts and circumstances at issue from a lawyer
licensed in the recipient’s state, country or other appropriate licensing jurisdiction.
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S.C. Wack
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Hershberg had a chapter in the 1941 Fieser and his stirrer is shown there as well, but the OS picture speaks for itself. Obviously shaking would be
simpler.
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12thealchemist
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Has anyone made one themselves, or got a photograph of one? Apparently, my PI wants a photograph and isn't satisfied with the diagram that is readily
available on Google or the modified Hershberg paper.
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Sulaiman
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There is a photograph here in the file attached to the post by not_important
http://sciencemadness.org/talk/viewthread.php?tid=8991
CAUTION : Hobby Chemist, not Professional or even Amateur
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rockyit98
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just a thought.you can just make them as a whole unit no need for magnetic joint. watch the thought emporium https://www.youtube.com/channel/UCV5vCi3jPJdURZwAOO_FNfQ
as he make PTFE joint and seals stuff.
[Edited on 26-10-2019 by rockyit98]
"A mind is a terrible thing to lose"-Meisner
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