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[Chemical Knowledge]：Production method and process of ethyl difluorobromo acetate

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Ethyl difluorobromoacetate is an important raw material for chemical production, which is widely used in medicine, pesticide, liquid crystal materials and other fields. This article will introduce the manufacturing method of ethyl difluorobromoacetate, including raw material preparation, reaction steps, post-treatment and so on.

1. raw material preparation

manufacturing difluorobromoethyl acetate need to prepare the following raw materials: difluoroacetic acid, sodium bromide, ethanol, sulfuric acid. Among them, difluoroacetic acid and sodium bromide are the main reactants, ethanol is used as a solvent, and sulfuric acid is used as a catalyst.

2. Reaction Step

1. Difluoroacetic acid and sodium bromide are added into ethanol, and stirred evenly to obtain a mixed solution.

2. sulfuric acid is added into the mixed solution, and the reaction temperature is controlled at 50-60 ° C., and the reaction is carried out for about 2-3 hours.

3 After completion of the reaction, the reaction solution was poured into ice water to precipitate a solid product.

4. Filtration gave a solid product which was recrystallized from ethanol to give ethyl bromoacetate difluorobromoacetate in higher purity.

3. post-treatment

1. difluorobromoethyl acetate purity testing to ensure that its purity meets the requirements.

2. Treat waste liquid and waste gas in the production process to ensure environmental protection requirements.
Precautions for
4.

1. Strictly control the reaction temperature and time during the production process to avoid by-products.

2. Carry out regular maintenance and maintenance on production equipment and pipelines to ensure production safety and stability.

In short, the manufacturing method of ethyl difluorobromoacetate requires strict control of reaction conditions and raw material quality to ensure product purity and production safety. At the same time, it is also necessary to deal with the waste in the production process to protect the environment.

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