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[Chemical Knowledge]：Manufacturing method and process of polyethylene wax

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The manufacturing method
of polyethylene wax
1. Introduction

Polyethylene wax is an important material widely used in the field of chemical production raw materials. Due to its unique physical and chemical properties, it is widely used in plastic processing, coatings, inks, fibers and other fields. This article will introduce the manufacturing method of polyethylene wax in detail, including raw material preparation, synthesis reaction, post-treatment and other processes.

2. Raw Materials Preparation

The main raw materials for manufacturing polyethylene wax are ethylene and polymer wax. Among them, ethylene is the basic raw material of petrochemical industry, and polymer wax is a kind of hydrocarbon compound with high molecular weight. In the raw material preparation stage, it is necessary to ensure the purity and quality of the raw materials to avoid adverse effects on subsequent reactions.

3. Synthesis Reaction
The synthesis reaction of
polyethylene wax usually adopts the method of high pressure polymerization. The specific steps are as follows:

1. Ethylene and polymer wax are mixed according to a certain ratio, and then a catalyst, such as Ziegler-Natta catalyst or chromium-based catalyst, is added.
2. The mixture is fed into a high-pressure polymerization kettle, and the polymerization reaction is carried out under the conditions of high pressure and high temperature. Generally, the reaction pressure is in the range of 1000 to 3000 atm and the reaction temperature is in the range of 150 to 300°C.
3. During the polymerization process, the mixture needs to be constantly stirred to ensure uniform reaction. At the same time, the reaction temperature and pressure need to be strictly controlled to prevent the occurrence of side reactions.

4. Post-Treatment

After the end of the polymerization reaction, the product needs to be post-treated to obtain high-quality polyethylene wax. The specific steps are as follows:

1. the polymer is removed from the polymerization kettle, cooled and pelletized. The pelletized polymer is granular, which is convenient for subsequent processing and use.
2. The polymer particles are dried and sieved to remove moisture and impurities therefrom. At the same time, according to different requirements, the polymer particles can be screened with different particle sizes to meet different application requirements.
Precautions for
5.

In the process of manufacturing polyethylene wax, the following matters need to be paid attention to:

1. Strictly control the quality and purity of raw materials to avoid adverse effects on subsequent reactions.
2. In the polymerization process, the reaction temperature and pressure need to be strictly controlled to prevent the occurrence of side reactions. At the same time, the mixture needs to be constantly stirred to ensure that the reaction proceeds uniformly.
3. In the post-treatment process, the polymer particles need to be fully dried and screened to ensure the quality of the product.

6. conclusion

polyethylene wax as an important chemical raw material, has a wide range of applications in various fields. Through the manufacturing method introduced in this article, high-quality polyethylene wax can be effectively prepared to provide high-quality raw materials for various industries.

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