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[Chemical Knowledge]：Production and manufacturing method and process of butyl cerate

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Manufacturing Method
of Butyl Cereate
Butyl Cereate is an important chemical raw material, which is widely used in coating, printing ink, plastic, rubber and other fields. This article will introduce the manufacturing method of butyl cerate, including raw material preparation, esterification reaction, distillation and purification steps.

1. Raw Material Preparation

The manufacture of butyl cerylate requires the preparation of the following raw materials: ceric acid, n-butanol, catalyst (sulfuric acid or p-toluenesulfonic acid). Among them, wax acid can be extracted from animal and vegetable oils and fats, and n-butanol can be prepared by ethylene hydration.

2. Esterification Reaction

The wax acid and n-butanol are added into the reactor at a molar ratio of 1:1.1-1.2, and the catalyst is added at the same time. The reaction kettle is heated to a certain temperature (generally between 120~140 ℃) and maintained for a certain time (generally 4~6 hours) for esterification. During the reaction, constant stirring is required to prevent the material from coking.
Purification

3. Distillation After completion of the reaction, the reaction solution was cooled to room temperature and then purified by distillation. First, atmospheric distillation was carried out to distill the unreacted n-butanol and water, and then it was changed to distillation under reduced pressure to distill the butyl cerate. In the distillation process, it is necessary to control the distillation temperature and vacuum degree to ensure product quality.

4. post-treatment
The butyl cerate obtained by
distillation needs to be post-treated, including decolorization, deodorization, dehydration and other steps. Generally, the activated carbon adsorption method is used for decolorization, washing and deodorizing with sodium hydroxide solution, and finally drying and dehydrating with anhydrous magnesium sulfate.

In short, the manufacturing method of butyl cerylate mainly includes the steps of raw material preparation, esterification reaction, distillation purification and post-treatment. It is necessary to pay attention to safety during operation, control the reaction temperature and time, and ensure product quality. At the same time, waste water and waste gas need to be treated to meet environmental requirements.
The above
is only a basic method for manufacturing butyl cerate, which can be adjusted and optimized according to specific conditions in actual operation. For example, factors such as the ratio of raw materials, the type and amount of catalyst, reaction temperature and time can be changed to improve product quality and yield. In addition, for wax acid and n-butanol from different sources, their composition and quality may be different, so they need to be adjusted according to actual conditions.

5. quality control

In the manufacturing process of butyl cerate, it is necessary to strictly control the product quality, including color, acid value, ester content and other indicators. Generally speaking, the lighter the color, the lower the acid value and the higher the ester content, the better the product quality. Therefore, it is necessary to conduct regular quality inspections during operation and adjust process parameters in time to ensure stable product quality.

6. environmental protection and safety

The manufacturing process of butyl cerate will produce certain pollutants such as waste water, waste gas and waste residue, so it is necessary to carry out environmental protection treatment. Wastewater can be treated by biochemical treatment, physical and chemical treatment and other methods; waste gas can be treated by absorption, adsorption, combustion and other methods; waste residue can be used for resource utilization or safe landfill. At the same time, it is necessary to pay attention to safety during operation, comply with relevant regulations and standards, and ensure the safety of the lives and property of employees and surrounding residents.

In short, the manufacturing method of butyl cerylate requires comprehensive consideration of raw materials, processes, equipment, environmental protection and safety and other factors to ensure product quality and production efficiency. At the same time, it is necessary to strengthen technological research and development and innovation, continuously improve the level of manufacturing technology and product quality, and contribute to the development of the chemical industry.

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