Process for mixing an acidic aqueous solution comprising hydroxyl ammonium and phosphate with nitric acid
The invention relates to a process for mixing a first acidic aqueous solution comprising hydroxyl ammonium and phosphate with a second acidic aqueous solution comprising nitric acid at a temperature between 20 and 80 DEG C resulting in a third acidic aqueous solution comprising hydroxyl ammonium, ph...
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| Hauptverfasser: | , |
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | The invention relates to a process for mixing a first acidic aqueous solution comprising hydroxyl ammonium and phosphate with a second acidic aqueous solution comprising nitric acid at a temperature between 20 and 80 DEG C resulting in a third acidic aqueous solution comprising hydroxyl ammonium, phosphate and nitric acid, wherein in the third acidic aqueous solution the total acid concentration minus the phosphate concentration is lower than 0.523 In(Ähydroxyl ammoniumÜ/1.25) + 422/(T + 81) whereby Ähydroxyl ammoniumÜ is the concentration of hydroxyl ammonium in the third acidic aqueous solution, T is the temperature of the third acidic aqueous solution expressed in DEG C and all concentrations are expressed in mol/l. |
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