Manufacturing method of POM (o-chlorophenol)
o-chlorophenol (POM) is an important organic chemical raw material, which is widely used in the fields of pesticides, pharmaceuticals, dyes and so on. In this article, we will introduce the manufacturing method of POM, including the steps of raw material preparation, reaction process, and post-processing.
I. Raw material preparation
The main raw materials for manufacturing POM are phenol and chlorine. In order to ensure the smooth progress of the reaction, it is necessary to purify the phenol and chlorine gas first to remove the water and impurities.
II. Reaction process
1. Chlorination reaction
Purified phenol and chlorine gas are added into the chlorination reactor according to a certain ratio, and the chlorination reaction is carried out under the action of catalyst. The reaction temperature and pressure need to be controlled during the reaction to ensure the smooth progress of the reaction. The chlorination reaction mainly produces two products, o-chlorophenol and p-chlorophenol, which need to be separated by separation operation.
2. Separation operation
After the chlorination reaction, the reaction solution needs to be cooled to precipitate the solid products. The solid products are then separated from the mother liquor by centrifugation or filtration. The solid product obtained needs to be further purified to remove impurities from it. III. Post-treatment
1. Purification
In order to obtain POM products with higher purity, the separated solid products need to be purified. Commonly used purification methods include recrystallization, distillation and so on. During the purification process, attention needs to be paid to controlling the operating conditions in order to avoid decomposition and loss of the product.
2. Product packaging and storage
Purified POM products need to be packaged and stored. Packaging materials should have good sealing and oxidation resistance to avoid product deterioration and contamination. Direct sunlight and high temperature environment should be avoided during storage to ensure the stability and quality of the product.
In conclusion, the manufacturing method of POM includes steps such as raw material preparation, chlorination reaction, separation operation and post-processing. Care needs to be taken to control the operating conditions during the manufacturing process to ensure the purity and quality of the product. At the same time, it is also necessary to strengthen the safety management and environmental protection measures in the manufacturing process to ensure the smooth running of the production process and minimize the impact on the environment.
