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Author: Subject: LAH from LiH and AlCl3
nickec
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[*] posted on 28-12-2014 at 10:16
LAH from LiH and AlCl3


"LAH was first prepared from the reaction between lithium hydride (LiH) and aluminium chloride:[2][3]

4 LiH + AlCl3 → LiAlH4 + 3 LiCl"

For the purposes of another experiment I need a very small quantity of Lithium Aluminum Hydride. After reading the above quote on Wikipedia I began to wonder if I could make some since the budget is tight.

Could a beginner reasonably do this?
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bismuthate
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[*] posted on 28-12-2014 at 11:34


You could do that reaction without too much trouble, but making LiH and AlCl3 would be very difficult.



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dermolotov
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[*] posted on 28-12-2014 at 12:48


Quote: Originally posted by bismuthate  
You could do that reaction without too much trouble, but making LiH and AlCl3 would be very difficult.

Lithium Aluminium Hydrate is also ridiculously difficult to work with. Hydrophoric if I can remember...

have you looked into just getting the borohydride reducing agent? Or seeing if you can just use calcium metal??
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[*] posted on 28-12-2014 at 13:12


Perhaps detailing your "other experiment" would lead to suggestions on a safer and easier alternative.




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nickec
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[*] posted on 28-12-2014 at 13:44


Quote: Originally posted by Bert  
Perhaps detailing your "other experiment" would lead to suggestions on a safer and easier alternative.


Thank you.

This researcher: A. Parkhomov

wrote this paper: Thermogenerator Study

Because of debates re his preliminary results I wish to do a similar experiment.

My reference for safety issues includes: Prudent Practices in the Lab

I appreciate any and all help.

nc
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[*] posted on 28-12-2014 at 13:46


Quote: Originally posted by bismuthate  
You could do that reaction without too much trouble, but making LiH and AlCl3 would be very difficult.


Thanks Bismuthate.
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nickec
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[*] posted on 28-12-2014 at 13:48


Quote: Originally posted by dermolotov  
...
Lithium Aluminium Hydrate is also ridiculously difficult to work with. Hydrophoric if I can remember...

have you looked into just getting the borohydride reducing agent? Or seeing if you can just use calcium metal??


If only another reducing agent would work. Unlikely.

Perhaps after I replicate the original experiment, I can investigate whether borohydride can serve.

Thanks Dermolotov.
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[*] posted on 28-12-2014 at 13:55


In a nutshell I will place "pure" nickel powder and lithal inside a sealed reactor, just a hard bronze brazed stainless steel pipe cap and plug, heat it and allow it to cool. As a control I will heat the same vessel with no powder inside first.

Careful data gathering of the temperature and analysis of the trends is the goal.

Limited funds mean I must compromise on equipment and material. This is a first pass at procedures.

I seek to simplify the experiment. Instead of using electricity to heat the reactor I plan to use a torch.

This is a dangerous experiment and great care is advised.
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[*] posted on 28-12-2014 at 14:11


Perhaps a collated & edited post of all your information sources and proposed experimental procedure could be used to start a thread in technochemistry?

Most people looking for LiAH in "beginnings" have a very different purpose in mind.




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[*] posted on 28-12-2014 at 14:19


Quote: Originally posted by Bert  
... a collated & edited post of all your information sources and proposed experimental procedure could be used to start a thread in technochemistry ...


I appreciate the guidance Bert. :)

I will post to technochemistry my proposed experimental procedure.
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[*] posted on 28-12-2014 at 21:46


Quote: Originally posted by Bert  
Most people looking for LiAH in "beginnings" have a very different purpose in mind.

Just out of sheer curiosity (and now that the thread has birthed another, more relevant one) ...... what is that purpose?
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[*] posted on 28-12-2014 at 22:42


Some may consider that I overemphasize the threads that are sent to detritus?


image.jpg - 14kB

If someone makes a first post here on acquiring it, apparently has not a clue how to make or handle Lithium Aluminum hydride- and refers to needing it for an unspecified "other project", they may have an interest in cookery. Hence my gentle inquiry as to the nature of "other project", and pleasure that it was not so.

Site policy absolutely allows discussion of these areas of organic chemistry. But not requests for spoon feeding by drug cooks.

[Edited on 29-12-2014 by Bert]




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3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.

Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).

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