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[Chemical Knowledge]：Manufacturing method and process of butyl stearate

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Manufacturing method

of butyl stearate Butyl stearate is an important chemical raw material, widely used in plastics, rubber, coatings, cosmetics and other fields. This article will introduce the manufacturing method of butyl stearate.

1. Raw Materials Preparation

The main raw materials for the manufacture of butyl stearate are stearic acid and n-butanol. Before starting production, the quality of raw materials needs to be inspected to ensure that their purity and stability meet production requirements.

2. Esterification Reaction

Stearic acid and n-butanol are fed into an esterification reactor according to a certain molar ratio, and the esterification reaction is generally carried out at a temperature of 60-80°C. Constant stirring is required during the reaction to promote uniform reaction. At the same time, the pH value of the reaction solution needs to be controlled between 7 and 8 to avoid the side reaction of the esterification reaction in the acidic environment.

3. Dehydration Treatment

After completion of the esterification reaction, the reaction solution needs to be subjected to dehydration treatment to remove residual water. Generally, a desiccant such as molecular sieve or magnesium sulfate is used for dehydration treatment, and the moisture content in the treated reaction liquid should be controlled below 0.1%.
purification
4. distillation

impurities such as unreacted stearic acid and n-butanol are contained in the reaction solution after dehydration treatment, and purification by distillation is required. Generally, butyl stearate is distilled out at a lower temperature by vacuum distillation, while avoiding decomposition of butyl stearate at high temperatures.

5. quality inspection

After distillation and purification of butyl stearate need to carry out quality inspection, including purity, color, acid value, moisture and other indicators. Butyl stearate that meets the quality standards can enter the finished product tank, and those that do not meet the standards need to be purified or processed again.

The above is the basic manufacturing method of butyl stearate. The specific production process needs to be adjusted and controlled according to the actual situation to ensure the quality and stability of the product. At the same time, it is necessary to pay attention to safety and environmental protection and abide by relevant laws, regulations and regulations during the production process.

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