Potassium cyanide (KCN) was a significant source of alkali metal cyanides prior to the invention in the Castner process. It had been produced by the decomposition of potassium ferrocyanide. The reaction is as follows: The "Expecting liquor" that contains these ions is separated through the solids, that are discarded to https://potassium-cyanide-for-sal93444.slypage.com/30889203/the-fact-about-is-potassium-cyanide-deadly-that-no-one-is-suggesting