Manufacturing method of butyl ester
I. Introduction
With the continuous development of chemical industry, butyl ester, as an important organic chemical raw material, has been widely used in the fields of plastics, rubbers, coatings, inks and so on. In order to meet the market demand and improve the production efficiency and quality of butyl ester, the manufacturing method of butyl ester will be discussed in detail in this paper.
II. Properties and Uses of Butyl Ester
Butyl ester is a colorless and transparent liquid with a pleasant fruity aroma. It has good solubility, volatility and water resistance, and is an excellent solvent and plasticizer. In plastics and rubber processing, butyl ester can increase the flexibility, ductility and processability of the material; in coatings and printing ink, butyl ester can regulate the drying speed and viscosity of the product, and improve the leveling and gloss of the coating film.
Three, butyl ester manufacturing method
1. Esterification method
Esterification method is the main method to produce butyl ester, the principle is in the acid catalyst, so that the butanol and acetic acid esterification reaction to produce butyl ester and water. This method has the advantages of easy to obtain raw materials, simple operation and low cost, but the reaction process will produce a large amount of waste acid and wastewater, causing some pollution to the environment.
2. Ester exchange method
Ester exchange method is a new type of butyl ester production method, the principle is to utilize alcohol and acid ester to carry out ester exchange reaction under the action of catalyst to generate new ester and alcohol. This method has the advantages of high atomic economy and low waste emission, and it gradually becomes the research hotspot of butyl ester production.
Four, butyl ester production process
1. Raw material preparation
The raw materials for butyl ester production are mainly butanol and acetic acid, of which the mass fraction of butanol should be controlled at more than 99% and that of acetic acid should be controlled at more than 98%. In order to ensure the smooth progress of production, it is also necessary to carry out pre-treatment of raw materials such as dehydration and desulfurization.
2. Esterification reaction
The pretreated butanol and acetic acid are added into the esterification reactor according to a certain proportion, and the esterification reaction is carried out under the action of acid catalyst. During the reaction, the parameters such as temperature, pressure and acidity should be controlled to ensure the smooth progress of the reaction.
3. Separation and refining
After the esterification reaction is finished, the reaction solution needs to be separated and refined to obtain the butyl ester product with higher purity. Commonly used separation methods include distillation, extraction, etc., and suitable separation methods can be selected according to the actual situation.
V. Quality control of butyl ester production
In order to ensure the stable and reliable quality of butyl ester products, it is necessary to carry out comprehensive quality control of the production process. Specifically, it includes the quality control of raw materials, the control of production process and the testing of product quality. Only by establishing a perfect quality control system can we ensure that the quality and performance of butyl ester products meet the expected requirements.
VI.CONCLUSION
Butyl ester, as an important organic chemical raw material, has been widely used in the fields of plastics, rubber, coatings, inks and so on. This paper introduces the properties and uses of butyl ester, discusses the two manufacturing methods of esterification and ester exchange, and elaborates the production process and quality control measures of butyl ester. Through the introduction of this paper, it is believed that the readers have a deeper understanding of the manufacturing methods of butyl ester, which provides a useful reference for the future production practice.
