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

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Adipic acid manufacturing method

1. Introduction

Adipic acid is an important organic chemical raw material, widely used in the production of plastics, fibers, rubber and other polymer materials. With the continuous progress of science and technology, the manufacturing method of adipic acid has been continuously improved and optimized. This paper will introduce the manufacturing method of adipic acid in detail, including the selection of raw materials, reaction principle, process flow, equipment selection and so on.

2. raw material selection

manufacturing adipic acid is the main raw material of benzene, nitric acid and oxidant. Among them, benzene is a common organic chemical raw materials, nitric acid as an oxidant, can be oxidized to adipic acid. When selecting raw materials, factors such as cost, source, and purity should be considered.

3. reaction principle

adipic acid manufacturing process mainly includes two steps of oxidation reaction and neutralization reaction. The specific reaction principle is as follows:

1. oxidation reaction: benzene and nitric acid in the role of oxidant, oxidation reaction to produce adipic acid. The reaction is an exothermic reaction, and it is necessary to control the reaction temperature to avoid the occurrence of side reactions.
2. Neutralization reaction: After the oxidation reaction, the resulting adipic acid solution contains acidic substances such as nitric acid, which need to be neutralized with lye to obtain pure adipic acid.

4. process

adipic acid manufacturing process mainly includes the following steps:

1 ingredients: benzene, nitric acid and oxidant in accordance with a certain proportion of the reactor.
2. Oxidation reaction: In the reaction kettle, control a certain temperature and pressure, so that benzene and nitric acid oxidation reaction to produce adipic acid.
3. Cooling crystallization: After completion of the reaction, the reaction solution was cooled to a certain temperature to precipitate adipic acid crystals.
4. Filtration and washing: The crystallized adipic acid was filtered and washed with clean water to remove impurities.
5. Drying and packaging: The washed adipic acid is dried and then packaged to obtain the finished adipic acid.

5. equipment selection

in the manufacturing process of adipic acid, need to use the reactor, crystallization tank, filter, dryer and other equipment. When selecting equipment, the appropriate equipment model and material should be selected according to the requirements of the production process to ensure the smooth progress of the production process.

6. production control

In order to ensure the production quality and output of adipic acid, it is necessary to control the production process comprehensively. Specific control measures include:

1. Control the quality of raw materials: Select high-quality raw materials to ensure that the purity and quality of raw materials meet production requirements.
2. Control of reaction conditions: In the oxidation reaction process, it is necessary to control the reaction temperature, pressure and other conditions to avoid the occurrence of side reactions.
3. Control of crystallization conditions: In the crystallization process, it is necessary to control the cooling rate and crystallization time to obtain high-quality adipic acid crystals.
4. Control product quality: Quality inspection of adipic acid products to ensure that product quality meets relevant standards.

7. environmental protection and safe production

In the manufacturing process of adipic acid, attention should be paid to environmental protection and safe production. Specific measures include:

1. Strengthen wastewater treatment: Proper treatment of wastewater generated in the production process to avoid pollution to the environment.
2. Strengthen waste gas treatment: purify the waste gas generated in the production process to reduce air pollution.
3. Strengthen safety management: establish and improve the safety management system, strengthen the safety training of employees, and ensure the safety and smooth progress of the production process.

8. conclusion

adipic acid as an important organic chemical raw material, its manufacturing method has been continuously improved and optimized. When choosing a manufacturing method, comprehensive consideration should be made according to the actual situation, and suitable production technology and equipment should be selected to ensure the smooth progress of the production process and improve product quality and production efficiency.

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