Manufacturing method of p-chlorobenzyl chloride
I. Introduction
p-chlorobenzyl chloride is an important organic chemical raw material, which is 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. In this paper, a common manufacturing method of p-chlorobenzyl chloride will be introduced.
2. Experimental raw materials and equipment
1. Raw materials: benzene, chlorine, catalyst (such as aluminum trichloride), etc.
2. Equipment: reactor, condenser, stirrer, etc.
3. Experimental steps
1. Add benzene into the reactor, turn on the stirrer and keep a certain stirring speed.
2. Gradually pass chlorine gas into the reactor and add catalyst at the same time, control the reaction temperature in the appropriate range.
3. During the reaction process, monitor the pH and HCl content of the reaction solution, and adjust the chlorine flow rate and catalyst dosage as needed.
4. When the reaction is completed, stop chlorination and stirring, and leave the reaction solution to stratify.
5. Separate the organic phase, wash with water to neutral and dry with anhydrous sodium sulfate.
6. Collect the fraction of p-chlorobenzyl chloride by distillation to obtain pure p-chlorobenzyl chloride product.
4. Experimental results and discussion
1. Through the above steps, we can get the product of p-chlorobenzyl chloride with higher yield and higher purity.
2. During the experiment, we found that factors such as reaction temperature, chlorine passage rate and catalyst dosage have a greater influence on the experimental results. Therefore, these parameters need to be strictly controlled during the operation.
3. In addition, in order to improve the purity and yield of the product, we also need to optimize the reaction equipment and operation method.
V. Conclusion
In this paper, a common manufacturing method of p-chlorobenzyl chloride is introduced, and by controlling the reaction conditions and optimizing the operation methods, p-chlorobenzyl chloride products with higher purity and higher yield can be obtained. The method has the advantages of easy operation and easy availability of raw materials, and is suitable for industrialized production. Meanwhile, this paper also discusses the possible problems during the experimental process, which provides a reference for further optimizing the experimental conditions.
