Acyl
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Removing sodium nitrate from sodium hydroxide.
I cant seem to think up any feasible routes for this, any help is much appreciated.
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not_important
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Depends on the ratios of the two. I suspect that if the nitrate is only 10% of the total then it's not worth recovering.
Is it the sodium nitrate as such, or the NO3(-) you are after? If it is just recoving nitrate then consider adding KOH or K2CO3 in equal molar
amounts with the NaNO3, KNO3 is less soluble which will may separation easier.
Assuming this is a solution, and that it's just the nitrate you're after and so have added a potassium salt, if the nitrate is in high enough
proportion you can crystalise some of it out by evaporation. You'll need to keep air away, or at least CO2. And remember that strong hydroxide
solutions etch glass and silicate ceramics. Decant the liquid from the crystals.
If you want as much of the nitrate as you can recover, then evaporate to dryness. Then add dry alcohol, use MgSO4 to dry ordinary denatured alcohol.
It will take about 7 ml of alcohol to dissolve 1 g of NaOH, add a little extra. Warm and stir the mix, then let it settle and cool. Again, decant off
the solution. Stir the solid nitrate with a little cold, dry alcohol, filter and wash it with more cold, dry alcohol.
evaporate to dryness, note that this will etch glass and ceramics and might best be finished
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zeppelin69
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Actualy, I think he is after the hydroxide. If he is having the same problem I am, his only source for NaOH is draino, but it is contaminated with the
nitrate. (and aluminum turnings, but that is easily removed.)
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