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Ostwald-procedo es kemiala procedo por fabrikar nitrat-acido, developita da Wilhelm Ostwald en 1902.
Amoniako transformesas en nitrat-oxido per oxidizo ye 900°C, uzante katalizivo ek platino konteninta 10% rodio.
- 4 NH3 + 5 O2 → 4 NO + 6 H2O
La nitrat-oxido es pluse oxidigata til nitrogen-dioxido,
- 2 NO + O2 → 2 NO2
qua dissolvesas en aquo por produktar 60% nitrat-acido.
- 4 NO2 + O2 + 2 H2O → 4 HNO3(aq)
Fixiginta nitro en amoniako e nitrat-acido esis klefo developeso en la produciono di dungi ed explozivi. Ante fonti di nitro havis guano e salpetro.
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