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[Chemical Knowledge]：Manufacturing method and process of vinyl chloride

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The manufacturing method
of vinyl chloride
1. Introduction

Vinyl chloride is an important organic chemical raw material, widely used in the production of plastics, rubber, fibers and other polymer materials. With the continuous development of the chemical industry, the manufacturing methods of vinyl chloride are constantly improving and optimizing. This paper will introduce the manufacturing methods of vinyl chloride, including acetylene method, ethylene method and joint method, and analyze its advantages and disadvantages and scope of application.

2. acetylene method

acetylene method is one of the common methods for the manufacture of vinyl chloride, the main raw materials are acetylene and hydrogen chloride. Acetylene and hydrogen chloride in the role of catalyst, the occurrence of addition reaction of vinyl chloride. The acetylene method has the advantages of simple process, convenient operation and low cost, so it is still widely used in some small chemical enterprises. However, the disadvantage of acetylene method is that a large amount of waste water and waste gas will be produced in the production process, which will cause great pollution to the environment.

3. Ethylene

The ethylene method is a more advanced method for manufacturing vinyl chloride, and its main raw materials are ethylene and hydrogen chloride. Ethylene and hydrogen chloride in the role of catalyst, the addition reaction of vinyl chloride. The advantage of the ethylene method is that it can produce high-purity vinyl chloride, while producing less waste gas and waste water, and less pollution to the environment. However, the disadvantage of the ethylene method is that it requires the use of high quality raw materials and the cost is relatively high.

4. combined method

combined method is a combination of acetylene method and ethylene method, which aims to give full play to the advantages of the two methods and make up for their shortcomings. The main raw materials of the combined method are acetylene, ethylene and hydrogen chloride, and by adjusting the ratio of raw materials and process parameters, the production of high yield and high purity vinyl chloride can be achieved, while reducing environmental pollution.

5. Manufacturing Process

Whichever method is used to manufacture vinyl chloride, the manufacturing process includes the steps of raw material preparation, reaction, separation and purification. Among them, the reaction is the key step in the production of vinyl chloride, and it is necessary to select the appropriate catalyst and reaction conditions to ensure the smooth progress of the reaction and the purity of the product. The separation and purification step is to ensure the quality and purity of the product, and it is necessary to separate and purify the reaction product.

6. safety measures

Because vinyl chloride is a toxic and harmful chemical raw material, it is necessary to strictly abide by safety operating procedures during the manufacturing process to ensure the safety of employees and the environment. At the same time, it is necessary to comprehensively monitor the production process, discover and solve potential safety hazards in time, and ensure the stability and safety of production.

7. environmental protection measures

Because the vinyl chloride manufacturing process will produce a certain amount of waste gas and waste water, it is necessary to take corresponding environmental protection measures for treatment. For example, waste gas combustion, waste water treatment, etc. can be used to reduce environmental pollution. At the same time, it is also necessary to strengthen the monitoring and management of waste water and waste gas to ensure that it meets the discharge standards.

8. Conclusion There are many manufacturing methods for

vinyl chloride, including acetylene method, ethylene method and combined method. Different methods have different advantages and disadvantages and scope of application, and need to be selected according to the actual situation. In the manufacturing process, it is necessary to strictly abide by the safety operation procedures and environmental protection requirements to ensure product quality and production safety. At the same time, it is also necessary to continuously explore new manufacturing methods and technologies to improve the production efficiency and quality of vinyl chloride and promote the sustainable development of the chemical industry.

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