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[Chemical Knowledge]：The production and manufacturing method and process flow of chlorine chlorine.

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1. of the manufacturing method
of chlorobenzyl chloride Introduction

Chlorobenzyl chloride is an important organic chemical raw material, widely used in pesticides, pharmaceuticals, dyes and other fields. Therefore, it is of great practical significance to study the manufacturing method of p-chlorobenzyl chloride. This article will introduce a common method for the manufacture of chlorobenzyl chloride.

2. experimental raw materials and equipment

1. raw materials: benzene, chlorine, catalyst (such as aluminum trichloride) and so on.
2. Equipment: reaction kettle, condenser, stirrer, etc.

3. experimental steps

1. add benzene into the reaction kettle, start the stirrer and maintain a certain stirring speed.
2. Gradually introduce chlorine into the reaction kettle, and at the same time add the catalyst to control the reaction temperature within a suitable range.
3. During the reaction, the pH value of the reaction liquid and the content of hydrogen chloride are monitored in time, and the chlorine passing rate and the amount of catalyst are adjusted as required.
4. When the reaction is completed, chlorine and stirring are stopped, and the reaction solution is allowed to stand and separate into layers.
5. The organic phase was separated, washed neutral with water and dried over anhydrous sodium sulfate.
6. By distillation method, the fraction of p-chlorobenzyl chloride is collected to obtain the pure p-chlorobenzyl chloride product.

4. Experimental results and discussion

1. Through the above steps, we can get a higher yield, higher purity of p-chlorobenzyl chloride products.
2. In the course of the experiment, we found that the reaction temperature, the rate of chlorine, the amount of catalyst and other factors have a greater impact on the experimental results. Therefore, these parameters need to be strictly controlled during operation.
3. In addition, in order to improve the purity and yield of the product, we also need to optimize the reaction equipment, operation methods and so on.

5. conclusion

This paper introduces a common method for the manufacture of chlorobenzyl chloride. By controlling the reaction conditions and optimizing the operation method, the chlorobenzyl chloride product with high purity and high yield can be obtained. The method has the advantages of simple operation and easy availability of raw materials, and is suitable for industrial production. At the same time, this paper also discusses the problems that may occur in the process of the experiment, which provides a reference for further optimizing the experimental conditions.

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