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[Chemical Knowledge]：Production and manufacturing method and process flow of POM (o-chlorophenol)

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The manufacturing method
of POM (o-chlorophenol)
o-chlorophenol (POM) is an important organic chemical raw material, which is widely used in pesticide, medicine, dye and other fields. This article will introduce the manufacturing method of POM, including raw material preparation, reaction process, post-treatment and other steps.

1. Raw Material Preparation

The main raw materials for the manufacture of POM are phenol and chlorine. In order to ensure the smooth progress of the reaction, the phenol and chlorine gas need to be purified to remove the water and impurities.

2. reaction process

1. chlorination reaction

add purified phenol and chlorine gas into the chlorination reactor according to a certain proportion, and carry out chlorination reaction under the action of catalyst. During the reaction, the reaction temperature and pressure need to be controlled 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 a separation operation.

2. Separation Operation
After completion of the
chlorination reaction, the reaction solution needs to be cooled to precipitate a solid product. The solid product is then separated from the mother liquor by a centrifugation or filtration operation. The resulting solid product requires further purification to remove impurities therein.

3. Post-Treatment

1. Purification Operation

In order to obtain POM products with higher purity, it is necessary to purify the separated solid products. Commonly used purification methods include recrystallization, distillation, etc. During the purification process, care should be taken to control the operating conditions to avoid decomposition and loss of the product.

2. Product packaging and storage
POM products after
purification need to be packaged and stored. The packaging material should have good sealing and oxidation resistance to avoid deterioration and contamination of the product. During storage, direct sunlight and high temperature environment should be avoided to ensure the stability and quality of the product.

In summary, the manufacturing method of POM includes the steps of raw material preparation, chlorination reaction, separation operation and post-treatment. In the manufacturing process, attention should be paid to controlling the operating conditions 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 production process to ensure the smooth progress of the production process and minimize the impact on the environment.

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