Manufacturing method of polyethylene wax
I. Introduction
Polyethylene wax is an important substance widely used in the field of raw materials for the production of chemicals, which has a wide range of applications in the fields of plastics processing, coatings, inks, fibers and so on due to its unique physical and chemical properties. In this paper, the manufacturing method of polyethylene wax will be introduced in detail, including raw material preparation, synthesis reaction, post-treatment and other processes.
II. Raw material 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, the purity and quality of the raw materials need to be ensured to avoid adverse effects on the subsequent reaction.
III. Synthesis reaction
The synthesis reaction of polyethylene wax usually adopts the method of high pressure polymerization. The specific steps are as follows:
1. Mix ethylene and polymer wax according to a certain proportion, and then add a catalyst, such as Ziegler-Natta catalyst or chromium catalyst.
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 1000-3000 atmospheres and the reaction temperature is in the range of 150-300 degrees Celsius.
3. During the polymerization reaction, the mixture needs to be stirred continuously to ensure that the reaction proceeds uniformly. 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 polymerization reaction, the product needs to be post-treated to obtain high-quality polyethylene wax. The specific steps are as follows:
1. Remove the polymer from the polymerization kettle for cooling and granulation. The pelletized polymer is in the form of granules to facilitate subsequent processing and use.
2. The polymer granules are dried and sieved to remove water and impurities therein. At the same time, according to different needs, the polymer particles can be sieved with different particle sizes to meet different application needs.
V. Precautions
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 in order to avoid adverse effects on the subsequent reaction.
2. During the polymerization reaction, 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 stirred continuously to ensure that the reaction proceeds uniformly.
3. In the post-treatment process, the polymer particles need to be sufficiently dried and sieved to ensure the quality of the product.
VI.CONCLUSION
Polyethylene wax, as an important raw material for the production of chemicals, has a wide range of applications in various fields. Through the manufacturing method introduced in this paper, high-quality polyethylene wax can be effectively prepared to provide high-quality raw materials for various industries.
