Current Location： Home > News > Chemical Knowledge > The production and manufacturing method and process of 3,4-dichloroaniline.

[Chemical Knowledge]：The production and manufacturing method and process of 3,4-dichloroaniline.

Read： 706 Time：14months ago Source：Transform the World with Simplicity

The manufacturing method
of 3,4-dichloroaniline
1. Introduction

3,4-dichloroaniline is an important chemical production raw material, widely used in medicine, pesticides, dyes and other fields. Due to its unique chemical properties, the study of manufacturing methods has been of great interest. This article will introduce the manufacturing method of 3,4-dichloroaniline in detail.

2. Manufacturing Methods

1. Chlorination

Chlorination is a common method for manufacturing 3,4-dichloroaniline. First, aniline is reacted with a chlorinating agent such as chlorine gas in the presence of a catalyst to produce 3,4-dichloroaniline. Commonly used catalysts include iron, zinc, aluminum and other metal salts. The reaction temperature is generally 50-150 ° C., and the reaction time is determined according to the case. The advantages of the chlorination method are that the process is simple and the cost is low, but a large amount of hydrogen chloride gas is generated, which needs to be treated.

2. Nitration method

nitration method is to nitration of aniline and nitric acid in the presence of sulfuric acid to generate 3,4-dinitroaniline, and then to obtain 3,4-dichloroaniline through reduction reaction. The reducing agent may be metal powder such as iron powder and zinc powder. The advantage of the nitration method is that the yield is higher, but more waste acid is produced and needs to be treated.

3. Acylation

acylation is the reaction of aniline with acid chloride (such as acetyl chloride) to form anilino chloride, and then react with chlorine to obtain 3,4-dichloroaniline. The process needs to be carried out at a low temperature in order to prevent the occurrence of side reactions. The advantage of the acylation method is that the product purity is higher, but the operation is more complicated.

3. Manufacturing Process Optimization

In order to improve the yield and purity of 3,4-dichloroaniline, the manufacturing process can be optimized. The following are some optimization measures:

1. Catalyst selection

choosing the right catalyst can improve the selectivity and yield of the reaction. For example, the yield of the chlorination process can be improved by using a novel composite catalyst.

2. the control
of reaction conditions
controlling the reaction temperature, time, material ratio and other conditions can reduce the occurrence of side reactions and improve the purity of the product.

3. Waste treatment

to produce waste for effective treatment, can reduce the pollution of the environment, but also conducive to the recycling of resources.

4. Conclusion

3,4-dichloroaniline has a variety of manufacturing methods, including chlorination, nitration, acylation and so on. Different methods have their own advantages and disadvantages, and it is necessary to choose the appropriate method according to the specific situation. In order to improve the yield and purity of the product, the manufacturing process can be optimized, including the selection of catalysts, the control of reaction conditions, the disposal of waste, etc. By optimizing the manufacturing process, the production efficiency and quality of 3,4-dichloroaniline can be further improved, and better raw material guarantee can be provided for the development of related fields.

Previous： Production and manufacturing method and process flow of p-nitroaniline

Next： Manufacturing method and process of 2,4-dichlorofluorobenzene

News Categories