First of all, we need to know which link you belong to in the pharmaceutical intermediates industry. Generally, some related trading companies or related sales departments Bai do not directly contact those products, so there is no safety problem. If it's in the first-line factory, it depends on what kind of process is used in the factory, such as the production of butyl acetate, an intermediate of penicillin. The esterification method is to use butyl acetate and esterification in the reactor. It is less harmful to human body, but it is more harmful to human body by one-step Du synthesis. Due to different varieties, sodium sulfite produced by some companies can only be supplied to aliphatic raw materials, which is basically harmless.
Now let's take an example of dye intermediates that are harmful to the environment and the body.
Dye intermediate production process
The production of dye intermediates includes the following processes: sulfonation, nitration, reduction of Dao, halogenation, amination, oxidation, acylation, alkylation and other chemical reactions of basic organic materials such as benzene, naphthalene, anthracene, etc. produce organic compounds with complex structure but without dye characteristics, such as H-acid, earth's acid, J-acid, etc.
The dye intermediate is made into the original dye through the reaction process of diazotization and coupling.
The original dye is then treated with a dye to make a commercial dye.
The dye production process consumes a lot of raw materials, which can reach several tons to dozens of tons per ton. At the same time, in the production process, it often needs one or more washing, resulting in a large number of by-products or wastes, especially waste liquid.
