Manufacturing method of dibutyl fumarate
I. Introduction
Dibutyl fumarate is an important raw material for the production of chemicals, which is widely used in the fields of plastics, rubber, paints and inks. It has excellent plasticizing properties and can improve the flexibility, processability and durability of materials. In order to meet the demand for dibutyl fumarate in different fields, it is of great significance to study its manufacturing method. In this paper, the manufacturing method of dibutyl fumarate will be introduced in detail, including raw material preparation, reaction process, post-treatment and other processes.
II. Raw material preparation
The main raw materials for manufacturing 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 the raw materials to avoid adverse effects on the subsequent reaction. At the same time, fumaric acid and n-butanol are mixed according to a certain proportion according to the production demand, so as to prepare for the reaction process.
Three, reaction process
The synthesis reaction of dibutyl fumarate belongs to esterification reaction, which needs to be carried out under certain temperature and pressure. The specific steps are as follows:
1. Add the mixed raw materials into the reaction kettle and heat to a certain temperature to initiate the esterification reaction.
2. During the reaction process, the raw materials need to be stirred continuously to promote the uniformity of the reaction.
3. Keep the environment in the reactor stable by controlling the temperature and pressure 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 is no longer increasing, the reaction is basically completed.
4. Post-treatment
After the reaction is finished, the product needs to be post-treated to obtain pure dibutyl fumarate. The specific steps are as follows:
1. Cool the reaction solution to room temperature and precipitate dibutyl fumarate crystals.
2. Separate the crystals from the mother liquor by filtration or centrifugation.
3. The crystals are washed to remove impurities adhering to the surface.
4. Dry the washed crystals to obtain pure dibutyl fumarate product.
V. Precautions
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 process of reaction, keep the environment in the reactor stable, avoid the fluctuation of temperature and pressure which will have adverse effect on the reaction.
3. During post-processing, ensure the purity and dryness of the product to avoid moisture or contamination.
4. During the whole manufacturing process, attention should be paid to safe operation and compliance with relevant regulations and rules to ensure the smooth running of the production process.
VI.CONCLUSION
Dibutyl fumarate, as an important raw material for the production of chemicals, has a wide range of application prospects. By mastering its manufacturing method, 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 raw material preparation, reaction process, post-treatment and other processes to ensure the quality and performance of the product.
