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[Chemical Knowledge]：The production process and preparation method of MMA methyl methacrylate.

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MMA methyl methacrylate is an important polymer material, which is widely used in automobile manufacturing, furniture manufacturing and building materials. This article will detail the production process and preparation method of MMA methyl methacrylate.
1. the production process of MMA methyl methacrylate
The production process of MMA methyl methacrylate mainly includes four steps: monomer preparation, polymerization reaction, separation and purification and deep processing.
1. Monomer preparation
The monomer preparation of MMA methyl methacrylate is the first step of the whole production process, and its product quality and output directly affect the quality and efficiency of the subsequent process. The monomer preparation of MMA methyl methacrylate is mainly obtained by the esterification reaction of methanol and acrylic acid. The ratio of reaction raw materials should be between 1:1.2~1.3, the reaction temperature should be controlled at about 60 ℃, and the reaction time should be 3~4 hours.
2. Polymerization
The polymerization of MMA methyl methacrylate is a process in which monomers are repeatedly polymerized to become polymer materials. The reaction generally adopts a free radical polymerization reaction, and needs to add benzoyl peroxide as an initiator, the reaction is carried out under normal temperature and pressure, and the reaction time is determined according to the needs of the product.
3. separation and purification of
MMA methyl methacrylate polymerization product is a polymer, need to be separated and purified to meet the requirements of the application. Separation and purification mainly includes solvent recovery, coagulation, washing and vacuum drying. Among them, the solidification process is the most important, through which the polymer with small molecular weight can be separated and purified, and the purity and quality of MMA methyl methacrylate can be improved.
4. Deep processing
The deep processing of MMA methyl methacrylate is the key link in the preparation of polymer materials. Through deep processing, the performance of MMA methyl methacrylate can reach the height required by people, including physical and chemical aspects. Deep processing is mainly heating, stretching, forming, coating and surface treatment of MMA methyl methacrylate to form the final product. The preparation method of
2. MMA methyl methacrylate The preparation method of
MMA methyl methacrylate mainly includes the following steps:
1. Preparation of raw materials
MMA methyl methacrylate requires methanol, acrylic acid, benzoyl peroxide and other raw materials, which need to be prepared according to a certain proportion before preparation.
2. Esterification reaction
After methanol and acrylic acid were mixed in a ratio of 1:1.2, esterification reaction was carried out under the action of adding benzoyl peroxide. The reaction time needs to be controlled at about 3 to 4 hours, and the reaction temperature is about 60°C.
3. Purification and vacuum drying
After the reaction, the reaction body is Purification and vacuum dried to remove impurities and improve the purity of the product.
4. Polymerization
The product from which impurities have been removed is polymerized, benzoyl peroxide is added as an initiator, and the reaction is carried out at a certain temperature.
5. Separation and purification
Through coagulation, washing and other steps, the polymer is separated and purified to improve the quality of the product.
6. Deep processing
heating, stretching, forming, coating and surface treatment of MMA methyl methacrylate to achieve optimal performance.
This paper introduces the preparation and production process of MMA methyl methacrylate from two aspects of production process and preparation method, which can provide reference for relevant practitioners.