https://en.wikipedia.org/wiki/Solubility_table
This should be of some help. It's a cycling process.
1) Boil down the solution until NaCl crashes out then hot filter.
2) Add 10% more water by volume. This should keep the remaining
NaCl in solution at freezing.
3) Freeze the solution so that NaNO3 crashes out. Note: Solubility of
NaNO3 at freezing is 73 grams per 100 ml water. The amount in your
solution must exceed this value in order to work.
Depending how much NaNO3 you want, or need, repeat the cycle.
Before it became cheap and too time consuming for my lazy ass, I
used this method to obtain KNO3 from NaNO3 and KCl.
[Edited on 2021/10/15 by MadHatter] |