by hfmphe 0 comment
Introduction to pharmaceutical technology General pharmaceutical technology mainly includes the following stages: Raw material, pretreatment, chemical reaction, separation, purification, product, preparation, and medicine. Taking the synthesis of nitrobenzene as a pharmaceutical intermediate as an example, the process is introduced as follows: Mixed acid composition: HNO3 5%, H2SO4 68%, H2O 27%; the molar ratio of HNO3 in