Meltonium
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Alkali Hydrides; No Catalyst, No High Temperatures
I just read this article
http://phys.org/news/2016-12-solvent-free-catalyst-free-alka...
in it the researchers claim to have made high-grade alkali metal hydrides using a ball mill! They say this reaction requires no high temperatures and
no catalyst.
In addition, they claim, "While increasing the pressure of the hydrogen gas accelerated the hydrogenation process, the research found that the process
will work with high-capacity industrial milling operations with minimal modifications." Meaning you can do it at home!
If anybody has a ball mill and is willing to try this, I would definitely enjoy hearing it.
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Bert
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Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
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| Quote: | | If anybody has a ball mill and is willing to try this, I would definitely enjoy hearing it. |
Yes, I imagine anyone in the neighborhood might hear it if amateur chemists start filling ball mills with alkali metals and H2...
Call me a cynic, but seriously. Handling the feed stocks alone, OR the end products without a fire/explosion is difficult enough for an amateur.
Adding a H2 feed system to a mechanism with a revolving reaction chamber and running the device full of Li, K or Na is going to be one of those things
that industry can do, but is "a challenge" for small scale home applications.
I know there are people here who could do it. But would they?
[Edited on 22-12-2016 by Bert]
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Fulmen
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C'mon, I know you want to. Go on...
We're not banging rocks together here. We know how to put a man back together.
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Chemetix
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Yup! i'm mad enough!
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Texium
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Thread Pruned
22-12-2016 at 16:35 |
Dan Vizine
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The "high temperature" isn't that high. The reaction proceeds well enough at 200 C. Use of an inert reaction medium is more of an advantage than a
disadvantage.
It would be far simpler to build an apparatus to do the reaction at 200 C than to successfully inert the mill and recover an unprotected solid.
This seems to be suited to a manufacturer, not a home lab. Sure, I could do this, but I wouldn't.
"All Your Children Are Poor Unfortunate Victims of Lies You Believe, a Plague Upon Your Ignorance that Keeps the Youth from the Truth They
Deserve"...F. Zappa
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zed
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Well.... If you are a clever tool monkey, you could build such a machine.
But, the older Paar reactor method isn't bad.
Not too hard to produce NaH or NaAlH4. And from there, you can get to many other hydrides.
There are some other references here on Science Madness, try the search engine.
What we are really waiting for, is a low-tech Borohydride Synthesis.
----------------------------------------------------------------------------
OK, that was yesterday. Here is one of the patents we discussed in the past. http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sec...
The bugaboo, was the need for using TriethylAluminum. Hard to handle, and not an easy make.
-------------------------------------------------------------------------------
A later patent application, suggests that TriethylAluminum can be avoided when using an alternate solvent like Diglyme. https://www.google.com/patents/CA1238767A?cl=en
These conditions can be achieved with a standard stirred Paar pressure reactor.
[Edited on 27-12-2016 by zed]
[Edited on 27-12-2016 by zed]
[Edited on 27-12-2016 by zed]
[Edited on 27-12-2016 by zed]
[Edited on 27-12-2016 by zed]
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