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[Chemical Knowledge]：Formaldehyde production manufacturing method and process

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Formaldehyde Manufacturing Method

1. Introduction

Formaldehyde is an important organic chemical raw material, widely used in phenolic resin, urea-formaldehyde resin, vinylon, hulotropine, pentaerythritol, dyes, pesticides and disinfectants production. In the field of chemical production raw materials, the manufacturing methods of formaldehyde mainly include oxidation method, dehydrogenation method and methanol method. These manufacturing methods will be described in detail in this article.

2. oxidation

oxidation is the main method for the production of formaldehyde, usually methanol as raw material, through the oxidation reaction of formaldehyde. The law is divided into silver and iron law.

1. Silver method

silver method uses silver as a catalyst. After methanol and air are mixed, oxidation reaction is carried out at high temperature to generate formaldehyde and water vapor. The temperature and pressure need to be controlled during the reaction to ensure the smooth progress of the reaction. The silver method has the advantages of high reaction temperature, high formaldehyde yield and good product quality, but the catalyst cost is higher.

2. iron method

iron method uses iron molybdenum oxide as catalyst, methanol and air are mixed, and the oxidation reaction is carried out at a lower temperature to generate formaldehyde and water vapor. The iron method has the advantages of low reaction temperature and low catalyst cost, but the yield of formaldehyde is relatively low.

3. dehydrogenation

dehydrogenation is a method for preparing formaldehyde by dehydrogenation reaction. Methanol is usually used as raw material, heated to a certain temperature under the action of a catalyst, so that methanol is dehydrogenated to generate formaldehyde and water vapor. The advantage of the dehydrogenation method is that the use of noble metal catalysts can be avoided and the production cost is reduced, but the reaction temperature is high and a large amount of energy is consumed.

4. methanol method

methanol method is a method for preparing formaldehyde by methanol dehydration reaction. At a certain temperature and pressure, methanol is heated to a certain temperature to dehydrate formaldehyde and water vapor. The advantages of the methanol method are simple process and convenient operation, but the reaction temperature is high and the energy consumption is large.

5. Conclusion

In summary, oxidation, dehydrogenation and methanol are effective methods for the production of formaldehyde. Different methods have different advantages and disadvantages, and the appropriate manufacturing method should be selected according to the actual situation. In the actual production process, the reaction conditions and operating parameters should be strictly controlled to ensure product quality and production safety. At the same time, waste gas treatment and environmental protection measures should be strengthened to reduce the impact on the environment.

6. Outlook

With the continuous progress of science and technology and the continuous improvement of environmental protection requirements, the manufacturing method of formaldehyde is also constantly improving and optimizing. In the future, the development of more efficient and environmentally friendly formaldehyde manufacturing methods will be an important research direction. At the same time, it is also an urgent problem to strengthen the waste gas treatment and environmental protection measures in the formaldehyde production process and reduce the impact on the environment. It is hoped that through continuous efforts and innovation, the green and efficient production of formaldehyde can be realized, and make greater contributions to the development of the chemical industry.

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