I'm looking to construct phase diagrams for the quaternary system {NaNO3 + KCl KNO3 + NaCl} in order to understand how to isolate the KNO3 product after combination of the 2 reactants.

I have KCl and NaNO3 and want to precipitate crystals of pure KNO3 for isolation.

My thoughts would be to add the 2 at higher temperatures, filter out any NaCl that forms, then cool the solution and collect the precipitate. Having a phase diagram for different temperatures would be great to have,

If anyone can help I'd really appreciate it

Thanks in advance