2 answers
Sort By
ChatGPT
Oct 7
The Ostwald process is a chemical process used for the industrial production of nitric acid (HNO3). It involves the oxidation of ammonia (NH3) to nitric oxide (NO) using a platinum catalyst, followed by the oxidation of nitric oxide to nitrogen dioxide (NO2) and the absorption of nitrogen dioxide in water to form nitric acid. The process was developed by German chemist Wilhelm Ostwald in the late 19th century and is still widely used today for the production of nitric acid.
1
Google Gemini AI
Oct 7
Ostwald Process
The Ostwald process is a method for industrial production of nitric acid (HNO3) developed by Wilhelm Ostwald in the late 19th century. It is a three-step process that involves the following reactions:
Step 1: Oxidation of Ammonia
- Ammonia gas (NH3) is oxidized to nitric oxide (NO) by reacting it with oxygen (O2) in the presence of a platinum-rhodium catalyst.
```
4NH3 + 5O2 → 4NO + 6H2O
```
Step 2: Oxidation of Nitric Oxide
- The nitric oxide produced in step 1 is further oxidized to nitrogen dioxide (NO2) by reacting it with more oxygen in the presence of water.
```
2NO + O2 → 2NO2
```
Step 3: Absorption and Hydration
- The nitrogen dioxide gas is then absorbed into water to form a solution of nitric acid and nitrogen monoxide.
```
3NO2 + H2O → 2HNO3 + NO
```
- The nitrogen monoxide produced in this step is recycled back to step 1 to be oxidized to nitric oxide.
The overall reaction of the Ostwald process can be summarized as:
```
NH3 + 2O2 → HNO3 + H2O
```
Features:
- The Ostwald process is a highly efficient and cost-effective method for producing nitric acid.
- It operates at relatively low temperatures (around 500°C) and pressures.
- The catalyst used in the process is highly active and durable.
- The process generates a concentrated solution of nitric acid (around 68%).
Applications:
Nitric acid produced by the Ostwald process is widely used in various industrial applications, including:
- Manufacturing of fertilizers (e.g., ammonium nitrate)
- Production of explosives (e.g., dynamite, TNT)
- Metal etching and surface treatment
- Production of dyes and pharmaceuticals
The Ostwald process is a method for industrial production of nitric acid (HNO3) developed by Wilhelm Ostwald in the late 19th century. It is a three-step process that involves the following reactions:
Step 1: Oxidation of Ammonia
- Ammonia gas (NH3) is oxidized to nitric oxide (NO) by reacting it with oxygen (O2) in the presence of a platinum-rhodium catalyst.
```
4NH3 + 5O2 → 4NO + 6H2O
```
Step 2: Oxidation of Nitric Oxide
- The nitric oxide produced in step 1 is further oxidized to nitrogen dioxide (NO2) by reacting it with more oxygen in the presence of water.
```
2NO + O2 → 2NO2
```
Step 3: Absorption and Hydration
- The nitrogen dioxide gas is then absorbed into water to form a solution of nitric acid and nitrogen monoxide.
```
3NO2 + H2O → 2HNO3 + NO
```
- The nitrogen monoxide produced in this step is recycled back to step 1 to be oxidized to nitric oxide.
The overall reaction of the Ostwald process can be summarized as:
```
NH3 + 2O2 → HNO3 + H2O
```
Features:
- The Ostwald process is a highly efficient and cost-effective method for producing nitric acid.
- It operates at relatively low temperatures (around 500°C) and pressures.
- The catalyst used in the process is highly active and durable.
- The process generates a concentrated solution of nitric acid (around 68%).
Applications:
Nitric acid produced by the Ostwald process is widely used in various industrial applications, including:
- Manufacturing of fertilizers (e.g., ammonium nitrate)
- Production of explosives (e.g., dynamite, TNT)
- Metal etching and surface treatment
- Production of dyes and pharmaceuticals
0
