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[Chemical Knowledge]：Production and manufacturing method and process flow of phenylacetonitrile

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of the manufacturing method
of phenylacetonitrile Phenylacetonitrile is an important organic chemical raw material, which is widely used in medicine, pesticides, dyes and other fields. This article will introduce the manufacturing method of benzene acetonitrile, including the reaction principle, process flow, equipment selection, operation points, safety and environmental protection.

1. reaction principle

The manufacturing method of phenylacetonitrile mainly uses the nucleophilic addition reaction of acetophenone and sodium cyanide to generate phenylacetonitrile. The reaction needs to be carried out at a certain temperature and under alkaline conditions. The specific reaction equation is as follows:

2. process

The manufacturing process of phenylacetonitrile mainly includes the following steps:

1. Feeding: Acetophenone and sodium cyanide are added to the reactor according to a certain proportion.
2. Stirring: Turn on the stirrer to mix the reactants thoroughly.
3. Heating: heating the reaction kettle, control a certain reaction temperature.
4. Reaction: Keep a certain reaction time to make acetophenone fully react with sodium cyanide.
5. Cooling: After completion of the reaction, the reaction kettle was cooled to room temperature.
6. Filtration: The salt by-products formed by the reaction were filtered off.
7. Distillation: The filtrate was distilled to obtain the phenylacetonitrile product.

3. equipment selection

The manufacture of phenylacetonitrile requires the selection of appropriate reaction equipment and auxiliary equipment to ensure production efficiency and product quality. Specific equipment selection is as follows:

1. reaction kettle: selection of stainless steel reactor, with corrosion resistance, high temperature resistance, pressure and other characteristics, to ensure the safety and stability of the reaction.
2. Agitator: The use of efficient, corrosion-resistant agitator, can ensure the full mixing of reactants.
3. Heater: Select efficient and reliable heater to ensure the control accuracy and stability of the reaction temperature.
4. filter: choose stainless steel filter, can ensure the purity of the filter effect and product.
5. distillation tower: the selection of efficient distillation tower, to ensure product quality and yield.

4. operation points

The manufacture of phenylacetonitrile needs to master the following operation points:

1. Control the feeding ratio: According to the reaction equation, strictly control the feeding ratio of acetophenone and sodium cyanide to ensure the progress of the reaction and the purity of the product.
2. Control the reaction temperature: When heating the reaction kettle, control a certain reaction temperature to avoid the effect of too high or too low temperature on the reaction.
3. Control the reaction time: maintain a certain reaction time, so that the reactants fully react, but also to avoid the generation of by-products caused by too long reaction.
4. Timely cooling and filtration: After the reaction is over, the reaction kettle should be cooled in time and the by-products should be filtered out to avoid the impact on the product.
5. Strictly control the distillation conditions: control a certain distillation temperature and pressure during distillation to ensure the quality and yield of the product.

5. safety and environmental protection

need to pay attention to safety and environmental protection in the manufacturing process of benzene acetonitrile, and take the following measures:

1. Strengthen equipment maintenance and overhaul to ensure the normal operation of equipment, and avoid the impact of equipment failure on production and safety hazards.
2. Strictly control the reaction conditions and operation process to avoid the discharge of harmful by-products and waste gas, waste water and other pollutants.
3. The waste gas, waste water and other pollutants are treated and treated, and then discharged after meeting the environmental protection requirements.
4. Strengthen staff safety training and environmental awareness education, improve staff safety awareness and environmental awareness, to ensure production safety and environmental protection.

In short, the manufacture of phenylacetonitrile requires knowledge of certain reaction principles, process flow, equipment selection, operation points, safety and environmental protection, etc., in order to ensure production efficiency and product quality, as well as production safety and environmental protection.

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