I would mix it (KNO3) with Carbon, and heat to redness to make Potassium Carbonate, and then that with Iron filings, a Nitrogen source (ie: leather,
etc), and more charcoal. That is supposed to form Ferrocyanide when heated to redness for an extended period of time, at which point you cool,
dissolve in water, and evaporate to collect product. I've tried this reaction several times, and I've managed to make it work exactly once. The
product is a pale yellow, a colour that reminds me of Potassium Nitrite. It might be more distinct if your product is better than mine.
[Edited on 7-3-2016 by Daffodile] |