nitration grade benzene

例句：

1. 1. The process of nitration is crucial in the production of nitric acid.
   硝化过程在生产硝酸酸的过程中至关重要。
2. 2. Nitration is a complex chemical reaction that occurs during the formation of organic compounds.
   硝化是一种复杂的化学反应，发生在有机化合物的形成过程中。
3. 3. During the nitration process, the nitrogen atom is replaced by oxygen atoms, resulting in the creation of nitric acid.
   在硝化过程中，氮原子被氧原子取代，从而产生了硝酸。