Abstract
The solubilities of the K2Cr2O7 + CrO3 + KNO3 + HNO3 + H2O system at 0 °C, 25 °C, and 45 °C were determined, and the phase diagrams were constructed. Furthermore, analyses and discussions are made on the crystalline areas in the phase diagrams. Based on the solubility data, the technique of a new cleaner process for manufacturing chromium trioxide and potassium nitrate simultaneously by decomposing potassium dichromate with nitric acid was evaluated.
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