Nitration Reaction

Limitations of Traditional Processes

1. Strong corrosiveness of raw materials;
2. Violent reaction with large heat release, requiring dropwise addition;
3. Complex and uncontrollable side reactions;
4. Unstable nitration products that are flammable and explosive.

Classification of Nitration Reactions

1) By Phase State: Liquid homogeneous nitration, liquid-liquid heterogeneous nitration, liquid-solid heterogeneous nitration.

2) By Reaction Temperature: Low-temperature nitration, ambient-temperature nitration, high-temperature nitration.

For liquid homogeneous and heterogeneous nitration reactions conducted at low or ambient temperatures, the technical improvement for continuous processing is relatively easy to achieve. In contrast, high-temperature nitration and liquid-solid heterogeneous nitration pose greater challenges.

Common Measures for Technical Improvement of Continuous Nitration

1. Temperature elevation to increase reaction rate;
2. Multi-site feeding;
3. Raw material precooling;
4. Product reflux;
5. Staged temperature control;
6. Solvent dilution.