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[Chemical Knowledge]：Production method and process of vinyl acetate

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The manufacturing method
of vinyl acetate
Vinyl acetate (VAc) is an important organic chemical raw material, which is widely used in synthetic resins, coatings, adhesives, fibers and other fields. This article will introduce the manufacturing methods of vinyl acetate, including acetylene method, ethylene method and ethanol method.

1. acetylene method

acetylene method is a classical method for the production of vinyl acetate, mainly acetylene and acetic acid as raw materials, in the presence of zinc acetate catalyst, the addition reaction to obtain vinyl acetate. The process is simple and easy to operate, but the purity of the generated vinyl acetate is low and further purification is required.

2. ethylene method

ethylene method is based on ethylene, acetic acid and oxygen as raw materials, through the oxidation reaction to generate acetic acid and acetaldehyde, and then acetaldehyde and acetic acid addition to obtain vinyl acetate. The reaction conditions of this method are relatively harsh and need to be carried out under high temperature and high pressure, but the generated vinyl acetate has a high purity and is suitable for large-scale production.

3. ethanol method

ethanol method is based on ethanol and acetic acid as raw materials, through esterification reaction to generate ethyl acetate, and then ethyl acetate and ethylene addition reaction to obtain vinyl acetate. The raw materials of the method are easy to obtain, the reaction conditions are mild, but the yield of vinyl acetate is low, and subsequent separation and purification are required.

No matter which method is used to manufacture vinyl acetate, it is necessary to comprehensively control and optimize the production process to ensure product quality and yield. At the same time, we should pay attention to safety and environmental protection in the production process, abide by relevant laws, regulations and standards, and ensure the sustainability and stability of the production process.

In short, there are many methods for manufacturing vinyl acetate, and different methods have their own advantages and disadvantages, which should be selected and optimized according to actual conditions. In the future, with the continuous progress and application of science and technology, the manufacturing method of vinyl acetate will continue to improve and perfect, and make greater contributions to the development of chemical production.

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