Methyl methacrylate in acrylic acid production: Specifications and sources

Methyl methacrylate: Specification and source analysis

Methyl methacrylate (MMA) is an important inorganic chemical intermediate, widely used in plastics, coatings, glass manufacturing and other fields. In this paper, the characteristics of MMA and its important position in chemical production will be analyzed in detail from two aspects of specifications and sources.

1. methyl methacrylate source

The main sources of methyl methacrylate include the following:

1. Raw material sources

The production of MMA requires propylene as the main raw material. Propylene can be produced by petroleum refining, ethylene polymerization or propylene oxidation. Among them, ethylene polymerization reaction is a common method for preparing propylene, and propylene can be obtained by dehydrogenation of the product. The quality and purity of propylene directly affect the production efficiency and product quality of MMA.

2. Catalyst Source

The catalyst plays a key role in the synthesis of MMA. Common catalysts include iron dioxide, copper dioxide and other metal catalysts, which can accelerate the reaction of propylene and acrylic acid and improve production efficiency. The performance of the catalyst (e. g., activity, stability) also has a significant impact on the yield and selectivity of MMA.

,3. Acrylic source

Acrylic acid is another important raw material of MMA. Acrylic acid can be produced by the reaction of ethylene with a acrylic ester or by the oxidation of propylene. The quality and purity of acrylic acid directly affect the final product quality of MMA.

2. methyl methacrylate specification analysis

1. Physical properties

The appearance of MMA is a colorless transparent liquid with a high viscosity and a density of about 0.85g/cm³. Its boiling point is high, about 190 ° C, and it is liquid at room temperature, but it will gradually volatilize under heating.

2. Chemical properties

MMA is a colorless transparent liquid, odorless and non-toxic, but may decompose at high temperatures. Its chemical properties are stable and suitable for production processes in high temperature environments. MMA may react with certain substances under acidic or alkaline conditions, so it is necessary to control the reaction environment when using it.

3. Chemical composition

The molecular formula of MMA is C3H4O2, which is composed of three elements: carbon, hydrogen and oxygen. Its molecular structure contains two double bonds, which makes MMA have good processability and wide applicability.

3. methyl methacrylate production technology

1. Process flow

The production of MMA typically employs an emulsion polymerization process. The process flow mainly includes the following steps:

• Propylene and acrylic acid according to a certain proportion of mixing;
• adding catalyst and emulsifier;
• in a specific polymerization reactor emulsion polymerization;
• Finally, through filtration, separation and other steps to obtain MMA liquid.

2. Quality control

In the production process of MMA, strict quality control measures are required to ensure product consistency and stability. Including raw material testing, catalyst performance testing, control of reaction conditions.

3. Environmental protection measures

With the enhancement of environmental awareness, the production process of MMA needs to pay attention to reduce the production of harmful substances. For example, the recycling of catalysts, the treatment of production waste, etc., can significantly reduce the environmental impact of the production process.

4. methyl methacrylate applications

1. The plastics industry

MMA is an important intermediate of polypropylene plastics, widely used in the production of HDPE, LDPE and other plastic products. Its excellent processing performance and stability make it a key raw material in the production of plastics.

2. Coatings industry

In the coatings industry, MMA is used as a crosslinking agent to improve the film-forming properties and durability of coatings. Its non-toxic and tasteless characteristics make it an ideal choice for environmentally friendly coatings.

3. The glass industry

MMA is used in the glass industry as a decolorizing agent and as a glass reinforcing material. Its excellent physical and chemical properties make it play an important role in the glass manufacturing process.

5. summary

As an important intermediate in chemical production, the research on the source, specification and production technology of methyl methacrylate is of great significance to the whole chemical industry. By optimizing the source of raw materials and production processes, the output and product quality of MMA can be significantly improved, thereby providing higher quality products for downstream applications. In the future, with the improvement of environmental protection requirements, MMA will pay more attention to green technology and catalyst recycling in the production process, which will be an important direction in its future development.