artemov
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Sodium nitrite from barium nitrite
Ok an embarassingly simple question. I managed to get some barium nitrite recently, just wondering if I can get sodium nitrite via a simple double
displacement reaction with sodium carbonate
Ba(NO2)2 (aq) + Na2CO3 (aq) -> 2NaNO2 (aq) + BaCO3 (s)
I need the sodium nitrite (aq) for an alkyl nitrite synthesis.
Is barium carbonate difficult to filter (I dun have vacuum filtration)?
How is the stability of sodium nitrite in solution?
I know I probably can use barium nitrite directly in the alkyl nitrite synthesis, but I dun really want to deal with barium in a shaking, frothing,
bubbling situation ...
Also, ppting the barium as a carbonate first gives me a convenient barium salt for future use.
[Edited on 7-2-2021 by artemov]
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itsallgoodjames
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I don't have much experience with barium stuff, but if it's anything like CaSO4, it'd be a pain to filter. Waiting for it to settle and decanting
might be an option, as is often used for CaSO4
Nuclear physics is neat. It's a shame it's so regulated...
Now that I think about it, that's probably a good thing. Still annoying though.
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Fyndium
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CaSO4 sludge is filterable with vacuum or sand pack filter, but needs patience and more water than is desired, which has to be concentrated later. The
hotter the solution can be kept the better.
Clogging frits with CaSO4 is no issue, it is soluble in water at a rate of 1g/L so flushing it with lots after washes it away. Other method is to
flush it with bicarb solution and acetic acid a couple of times. Carefully pushing air from below will cause the particles to flow backwards and this
is my general step when cleaning these. Helps surprisingly lot.
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unionised
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It seems that nobody here knows how well BaSO4 filters.
It isn't a difficult experiment to find out.
Perhaps the OP would be kind enough to try it and post the results.
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artemov
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Quote: Originally posted by unionised  | It seems that nobody here knows how well BaSO4 filters.
It isn't a difficult experiment to find out.
Perhaps the OP would be kind enough to try it and post the results. |
Erm it's actually BaCO3 ... but I guess I'll have to try it then. Cheers.
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unionised
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| Quote: Originally posted by artemov | | Quote: Originally posted by unionised | It seems that nobody here knows how well BaSO4 filters.
It isn't a difficult experiment to find out.
Perhaps the OP would be kind enough to try it and post the results. |
Erm it's actually BaCO3 ... but I guess I'll have to try it then. Cheers. |
Doh!
Let us know how it turns out.
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zed
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React boiling solutions. Higher solubility in hot solution, should result in slower, larger crystal growth.
Producing a product that can be easily filtered. Or, isolated by decanting liquid.
Oh yeah. Not to be underestimated.... Soluble salts of Barium are toxic. Carbonate included.
Sulfate, not such a problem. Highly insoluble.
[Edited on 9-2-2021 by zed]
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artemov
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| Quote: Originally posted by zed | React boiling solutions. Higher solubility in hot solution, should result in slower, larger crystal growth.
[Edited on 9-2-2021 by zed] |
Isn't sodium nitrite unstable in solution, perhaps more so in hot solution?
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