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[Chemical Knowledge]：Manufacturing method and process of dibutyl fumarate

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The manufacturing method
of dibutyl fumarate
1. Introduction

Dibutyl fumarate is an important chemical production raw material, widely used in plastics, rubber, paint, ink and other fields. It has excellent plasticizing properties, which can improve the flexibility, processability and durability of the material. In order to meet the demand for dibutyl fumarate in different fields, it is of great significance to study its manufacturing method. This article will introduce the manufacturing method of dibutyl fumarate in detail, including raw material preparation, reaction process, post-treatment and other processes.

2. Raw Material Preparation

The main raw materials for the manufacture of dibutyl fumarate are fumaric acid and n-butanol. In the process of raw material preparation, it is necessary to ensure the purity and quality of raw materials to avoid adverse effects on subsequent reactions. At the same time, according to production requirements, fumaric acid and n-butanol are mixed in a certain proportion to prepare for the reaction process.

3. reaction process

the synthesis of dibutyl fumarate is an esterification reaction, which needs to be carried out at a certain temperature and pressure. The specific steps are as follows:

1. the mixed raw materials are added into a reaction kettle and heated to a certain temperature to initiate the esterification reaction.
2. During the reaction, the raw materials need to be continuously stirred to promote the uniform progress of the reaction.
3. By controlling the temperature and pressure, the stability of the environment in the reactor is maintained to ensure the smooth progress of the reaction.
4. Monitor the amount of water generated during the reaction to determine the progress of the reaction. When the amount of water does not increase, the reaction is almost complete.

4. post-treatment
After the end of the
reaction, the product needs to be post-treated to obtain pure dibutyl fumarate. The specific steps are as follows:

1. The reaction solution was cooled to room temperature to precipitate dibutyl fumarate crystals.
2. The crystals are separated from the mother liquor by filtration or centrifugation.
3. The crystal is washed to remove impurities attached to the surface.
4. The washed crystals were dried to obtain pure dibutyl fumarate product.
Precautions for
5.

In the process of manufacturing dibutyl fumarate, the following matters need to be paid attention to:

1. Strictly control the quality and purity of raw materials to ensure the quality and performance of the product.
2. in the reaction process, to maintain the stability of the reactor environment, to avoid the temperature and pressure fluctuations on the reaction of adverse effects.
3. During the post-treatment process, ensure the purity and dryness of the product to avoid moisture or contamination of the product.
4. During the entire manufacturing process, pay attention to safe operation, comply with relevant laws and regulations, and ensure the smooth progress of the production process.

6. conclusion

dibutyl fumarate as an important chemical production raw material, has a wide range of applications. By mastering its manufacturing method, the effective production and quality control of dibutyl fumarate can be realized to meet the needs of different fields. In the actual production process, it is necessary to pay attention to the operation points and precautions of the raw material preparation, reaction process, post-treatment and other processes to ensure the quality and performance of the product.

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