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[Chemical Knowledge]：Manufacturing method and process of epoxy methyl ester

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Epoxy methyl ester is an important organic compound, which is widely used in chemical industry, medicine, pesticide and other fields. In the field of raw materials for chemical production, there are two main methods for manufacturing epoxy methyl ester: chloromethylation and hydrogen peroxide oxidation. This article will detail these two manufacturing methods.

1. chloromethylation

chloromethylation is a commonly used method for the manufacture of epoxy methyl ester, the main raw materials are formaldehyde, hydrogen chloride and methanol. The specific steps are as follows:

1. Formaldehyde and hydrogen chloride are mixed to react to generate chloromethyl ether.

2. Chloromethyl ether and methanol are mixed, heated to reflux, and the reaction generates epoxy methyl ester and hydrogen chloride.

3. The epoxy methyl ester is isolated by distillation and further purified to give the high quality epoxy methyl ester.

chloromethylation method has the advantages of easy access to raw materials, mild reaction conditions and high yield, so it is widely used in industrial production. However, this method will also produce a large amount of hydrogen chloride waste gas, causing certain harm to the environment and equipment, and the waste gas treatment needs to be strengthened.

2. hydrogen peroxide oxidation method

hydrogen peroxide oxidation method is a relatively new method of manufacturing epoxy methyl ester, the main raw materials are methanol and hydrogen peroxide. The specific steps are as follows:

1. methanol and hydrogen peroxide are mixed, and an acidic catalyst is added to react to generate formaldehyde and water.

2. formaldehyde and hydrogen peroxide are mixed again, and alkaline catalyst is added to react to generate epoxy methyl ester and water.

3. The epoxy methyl ester is isolated by distillation and further purified to give the high quality epoxy methyl ester.
The
hydrogen peroxide oxidation method has the advantages of green raw materials, mild reaction conditions, and no exhaust emissions, and is considered to be a promising manufacturing method. However, the yield of this method is low, and it is necessary to further optimize the reaction conditions and catalyst to improve the production efficiency.

In general, chloromethylation and hydrogen peroxide oxidation are both effective methods for the manufacture of epoxy methyl ester, and each has its own advantages and disadvantages. In actual production, a suitable manufacturing method can be selected according to specific conditions. At the same time, in order to improve production efficiency and reduce the impact on the environment, it is necessary to further explore and optimize manufacturing methods to promote the green development of chemical production raw materials.

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