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[Chemical Knowledge]：The production and manufacturing method and process of acrylic acid methyl ester nitrile.

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The manufacturing method
of methyl acrylate nitrile
1. Introduction

methyl acrylate nitrile is an important organic chemical raw material, widely used in synthetic fibers, plastics, rubber, coatings and other fields. Due to its unique chemical properties and wide range of applications, the manufacturing method of methyl acrylate nitrile has attracted much attention. This paper will introduce the manufacturing method of methyl acrylate nitrile in detail, including raw material preparation, reaction process, post-treatment and so on.

2. Raw Material Preparation

The main raw materials for the manufacture of methyl acrylate nitrile include acrylic acid, methanol and sodium cyanide. The ratio of acrylic acid and methanol is generally 1:1.1-1.2, and the amount of sodium cyanide is 1.0-1.2 times the number of moles of acrylic acid. In the process of raw material preparation, it is necessary to ensure the purity and quality of raw materials to avoid adverse effects on subsequent reactions.

3. Reaction Process
The manufacturing process of
methyl acrylate nitrile mainly includes two steps: esterification reaction and nitrilization reaction. The specific steps are as follows:

1. esterification reaction: acrylic acid and methanol are added into a reaction kettle according to a certain proportion, a small amount of acid catalyst, such as sulfuric acid or p-toluenesulfonic acid, is added, and the esterification reaction is carried out by heating to a certain temperature. The temperature and pH value need to be controlled during the reaction to ensure the smooth progress of the reaction. After completion of the esterification reaction, methyl acrylate is obtained.
2. Nitrilization reaction: methyl acrylate and sodium cyanide are added into the reaction kettle according to a certain proportion, a small amount of phase transfer catalyst, such as tetrabutyl ammonium bromide or triethyl benzyl ammonium chloride, and heated to a certain temperature for nitrilization reaction. The temperature and pH value need to be controlled during the reaction to avoid the formation of by-products. After completion of the nitration reaction, methyl acrylate nitrile is obtained.

4. Post-Treatment
After completion of the
reaction, the product needs to be post-treated to obtain pure methyl acrylate nitrile. The post-treatment process mainly includes distillation, washing, drying and other steps. The specific steps are as follows:

1. distillation: the reaction solution is distilled to separate unreacted raw materials and by-products to obtain crude methyl acrylate nitrile.
2. Washing: The crude methyl acrylate nitrile is washed with a dilute alkali solution to remove acidic impurities therein. It is then washed with clean water until neutral to give pure methyl acrylate nitrile.
3. Drying: The pure methyl acrylate nitrile is dried to remove moisture and other impurities.

5. precautions

In the process of manufacturing acrylic acid methyl ester nitrile, the following matters need to be paid attention to:

1. Control the quality and purity of the raw materials to avoid adverse effects on the reaction.
2. Control the reaction temperature and pH value to ensure the smooth progress of the reaction and avoid the formation of by-products.
3. In the post-processing process, it is necessary to ensure the purity and quality of the product to avoid affecting subsequent applications.

6. conclusion

acrylic acid methyl ester nitrile is an important organic chemical raw material, its manufacturing method mainly includes esterification reaction and nitrilization reaction two steps. In the post-treatment process, distillation, washing and drying steps are required to ensure the purity and quality of the product. In the manufacturing process, it is necessary to pay attention to control the quality and purity of raw materials, reaction temperature and pH value and other factors to ensure the smooth progress of the reaction and avoid the formation of by-products.

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