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[Chemical Knowledge]：Production method and process of ethyl phenyl cyanoacetate

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of the manufacturing method
of ethyl phenyl cyanoacetate is an important organic chemical raw material, which is widely used in medicine, pesticide, dye and other fields. This article will introduce the manufacturing method of ethyl phenyl cyanoacetate, including raw material preparation, reaction steps, post-treatment and precautions.

1. raw material preparation

1. Phenylacetic acid: Phenylacetic acid is the main raw material for the preparation of ethyl phenylcyanoacetate and should have a high purity to ensure the quality of the product.
2. Sodium cyanide: Sodium cyanide, as a cyanide source, reacts with phenylacetic acid to form phenylcyanoacetic acid.
3. Ethanol: Ethanol, as solvent and reactant, reacts with phenylcyanoacetic acid to form ethylphenylcyanoacetate.

2. reaction step

1. add phenylacetic acid into the reaction kettle, then add appropriate amount of ethanol, stir well.
2. Slowly add sodium cyanide aqueous solution under stirring, control the feeding rate and keep the reaction temperature within a certain range.
3. After the addition is completed, continue to stir for a certain period of time to allow the reaction to proceed fully.
4. After completion of the reaction, the reaction solution was cooled to room temperature to precipitate a solid product.
5. Through filtration, washing, drying and other operations, ethyl phenyl cyanoacetate product is obtained.

3. post-processing

1. Waste liquid treatment: The waste liquid produced during the reaction should be properly treated to avoid environmental pollution. The treatment can be carried out by oxidation reduction, precipitation and the like.
2. Waste gas treatment: harmful gases may be produced during the reaction process, which should be absorbed and burned to ensure safe production.

4. Precautions

1. Strictly control the feeding speed to prevent the reaction from being too intense and causing safety accidents.
2. Stirring should be maintained during the reaction to avoid the deposition of raw materials and affect the reaction effect.
3. Operators should do personal protection to avoid contact with toxic and harmful substances.
4. Relevant safety regulations shall be followed during production to ensure production safety.

In short, the manufacturing method of ethyl phenylcyanoacetate requires strict control of reaction conditions to ensure product quality and production safety. Through reasonable raw material preparation, reaction steps and post-treatment operation, high-quality ethyl phenyl cyanoacetate can be prepared, which provides support for the development of related fields.

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