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In the field of raw materials for chemical production, chlorinated polyethylene (CPE) is an important polymer material with excellent weather resistance, oil resistance, ozone resistance, and chemical corrosion resistance. There are two main methods for manufacturing CPE: suspension method and solution method. This article will provide a detailed introduction to these two manufacturing methods and specific operational steps

1、 Suspension method is a method of chlorination reaction that involves direct contact between polyethylene powder and chlorine gas under stirring. The specific operation steps are as follows: 

1 Ingredients: Add polyethylene powder, dispersant, water and other raw materials in a certain proportion to the reaction vessel

2. Stirring and ventilation: Turn on the stirring device to fully mix the raw materials, and at the same time, introduce chlorine gas for chlorination reaction

3. Temperature control: During the reaction process, it is necessary to control the temperature inside the reactor within an appropriate range to ensure the smooth progress of the chlorination reaction

4. Termination of reaction: When the degree of chlorination reaches the predetermined requirement, stop introducing chlorine gas and end the reaction

5. Post treatment: Centrifuge, wash, and dry the reaction products to obtain chlorinated polyethylene products

2、 The solution method is a method of dissolving polyethylene in an organic solvent and then introducing chlorine gas for chlorination reaction. The specific operation steps are as follows: 

1 Ingredients: Add polyethylene, organic solvents, initiators, and other raw materials in a certain proportion to the reaction vessel

2. Dissolution: Under stirring, the polyethylene is completely dissolved in organic solvents

3. Chlorine gas injection: Chlorine gas is introduced for chlorination reaction, and the reaction temperature and chlorine gas flow rate need to be controlled to maintain a stable reaction rate

4. Termination of reaction: When the degree of chlorination reaches the predetermined requirement, stop introducing chlorine gas and end the reaction

5. Post treatment: Dissolve, wash, and dry the reaction products to obtain chlorinated polyethylene products

The above are the two main manufacturing methods of CPE, each with its own advantages and disadvantages. The suspension method has the advantages of simple equipment, convenient operation, and low production cost, but the product quality is relatively poor; The solution rule has higher product quality, but the production cost is relatively high. In the actual production process, suitable manufacturing methods can be selected based on specific needs and conditions

Regardless of the method used, strict control of reaction conditions is necessary to ensure product quality and production safety. Meanwhile, effective treatment and recycling of waste gases and wastewater generated during the production process are also necessary to reduce their impact on the environment

In summary, the manufacturing method of CPE needs to be selected based on specific needs and conditions, while strictly controlling reaction conditions and waste disposal to ensure product quality and production safety, while also protecting the environment.