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

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of Manufacturing Methods
of Butyl Methacrylate Butyl methacrylate (Methacrylate, referred to as BMA) is an important chemical raw material, widely used in polymer synthesis, coatings, adhesives, printing inks and other fields. This article will detail the manufacturing method of butyl methacrylate.

1. Raw Material Preparation

The main raw materials for the manufacture of butyl methacrylate include methacrylic acid (Methacrylic Acid, abbreviated as MAA), butanol (Butanol), and sulfuric acid (Sulfuric Acid). Before starting production, it is necessary to ensure that the quality and purity of the raw materials meet the requirements, and at the same time prepare the required equipment and tools.

2. Esterification Reaction

1. Methacrylic acid and butanol are added into an esterification reactor according to a certain molar ratio, and the molar ratio of methacrylic acid to butanol is usually 1:1.05-1.10.
2. Add an appropriate amount of sulfuric acid as a catalyst, the amount of sulfuric acid is usually 0.5-1.0 percent of the mass of methacrylic acid.
3. The esterification reaction is carried out at a certain temperature and pressure, usually the reaction temperature is 60-80 ℃, and the reaction pressure is 0.2-0.3MPa.
4. The water produced by the esterification reaction and the unreacted raw materials are separated by distillation, the butyl methacrylate and the unreacted butanol are distilled off, and the water is left at the bottom of the kettle.

3. Purification

1. A mixture of butyl methacrylate obtained by distillation and unreacted butanol was cooled to precipitate solid impurities.
2. The solid impurities were removed by filtration to give a relatively pure mixture of butyl methacrylate and butanol.
3. The mixture is subjected to rectification to separate butyl methacrylate and butanol.

4. product quality inspection

carries out product quality inspection on refined and purified butyl methacrylate, including purity, acidity, chroma, moisture and other indicators to ensure that the product meets relevant standards and requirements.

5. packaging and storage

to package butyl methacrylate that has passed the test, usually in plastic drums or iron drums, with a net weight of 200kg or 1000kg. After packaging, store the product in a cool, dry and ventilated warehouse, avoid direct sunlight and high temperature environment.

6. waste treatment
The waste generated in the production process of the
, such as waste acid, waste water, waste residue, etc., should be properly treated in accordance with relevant environmental protection requirements to avoid harm to the environment and human health.

summary: The manufacturing method of

butyl methacrylate mainly includes raw material preparation, esterification reaction, refining and purification, product quality inspection, packaging and storage, and waste treatment. In the production process, it is necessary to strictly control the process parameters and quality indicators of each link to ensure product quality and environmental protection requirements. At the same time, strengthen the maintenance and maintenance of production equipment to improve production efficiency and product quality.

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