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[Chemical Knowledge]：Production and manufacturing method and process flow of tetrahydrofuran

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Tetrahydrofuran (THF) is an important organic compound, widely used in medicine, pesticides, plastics, solvents and other fields. This paper will introduce the manufacturing method of tetrahydrofuran, including raw material preparation, reaction process, post-treatment and so on.

1. raw material preparation

of raw materials for the manufacture of tetrahydrofuran mainly propylene, acetylene, formaldehyde and so on. Among them, propylene is the most common raw material, because of its low price, wide source and favored. In the process of raw material preparation, it is necessary to ensure the purity and quality of raw materials to avoid adverse effects on subsequent reactions.

2. Reaction Process

1. Synthesis of Acrolein

First, propylene is oxidized with oxygen to produce acrolein. The reaction needs to be carried out at high temperature and high pressure, and a catalyst needs to be added to promote the reaction. The produced acrolein needs to go through steps such as cooling and separation to obtain acrolein having a relatively high purity.

2. Hydrogenation
of Acrolein
Acrolein is subjected to an addition reaction with hydrogen to produce tetrahydrofuran. The reaction needs to be carried out under the action of a catalyst. Commonly used catalysts include metal catalysts such as nickel and palladium. The temperature and pressure need to be controlled during the reaction to ensure the smooth progress of the reaction. The generated tetrahydrofuran needs to undergo distillation, washing and other steps to obtain a product with higher purity.

3. post-treatment

generated tetrahydrofuran needs to be post-treated to ensure the quality and purity of the product. The post-treatment process includes distillation, extraction, crystallization and other steps to remove impurities and by-products. The resulting tetrahydrofuran needs to be quality inspected and packaged to meet customer needs.

In short, the manufacturing method of tetrahydrofuran needs to be controlled and adjusted through multiple links to ensure the quality and purity of the product. At the same time, it is necessary to pay attention to safety and environmental protection in the production process, and comply with relevant laws, regulations and standards. By continuously optimizing the production process and improving the technical level, we can reduce production costs, improve product quality, and create greater economic and social benefits for enterprises.

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