wg48
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Preperation of potassium floroaluminate
I need a few grams of potassium floroaluminate to use as an aluminium flux.
Can I make it by dissolving aluminium powder in a solution of potassium bifloride then evaporating the water to produce the dry product.
I hope I can perform the preparation in a stainless steel beaker.
[Edited on 3-5-2016 by wg48]
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blogfast25
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Ammonium hexafluoroaluminate is prepared by reacting freshly prepared Al(OH)3 with NH4HF2. There's a procedure in
Brauer's 'Inorganic preparations' (see SM library).
Not sure about the potassium version.
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wg48
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Quote: Originally posted by blogfast25  | Ammonium hexafluoroaluminate is prepared by reacting freshly prepared Al(OH)3 with NH4HF2. There's a procedure in
Brauer's 'Inorganic preparations' (see SM library).
Not sure about the potassium version. |
I expect the potassium salt would behave the same as they are both ionic. I will try it micro scale.
I wanted to use aluminium metal to avoid preparing the hydroxide but that should not be a problem.
Thanks for your reply.
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wg48
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| Quote: Originally posted by blogfast25 | Ammonium hexafluoroaluminate is prepared by reacting freshly prepared Al(OH)3 with NH4HF2. There's a procedure in
Brauer's 'Inorganic preparations' (see SM library).
Not sure about the potassium version. |
Brauer's book is interesting. I did search the forum but I think that does not include the library. I have scanned the library previously but most of
the files I wanted to view come up blank on my mobile. I will have to look again. I tried to load the viewer no success.
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