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[Chemical Knowledge]：Production method and process flow of petroleum naphthalene

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The manufacturing method
of petroleum naphthalene
1. Introduction

Petroleum naphthalene is an important chemical production raw material, widely used in dyes, pharmaceuticals, pesticides, plastics and other fields. Therefore, it is of great significance to study the manufacturing method of petroleum naphthalene for improving the production efficiency of chemical products and reducing the production cost. This paper will introduce the manufacturing method of petroleum naphthalene, including raw material selection, reaction principle, process flow, equipment selection and so on.

2. raw material selection

The raw material for the manufacture of petroleum naphthalene mainly comes from aromatic components in petroleum cracking products, such as benzene, toluene, xylene, etc. Therefore, the selection of petroleum cracking products with higher aromatic components as raw materials is beneficial to improve the yield and purity of petroleum naphthalene.

3. reaction principle

The production of petroleum naphthalene is mainly realized by the dehydrogenation condensation reaction of aromatic compounds. The specific reaction principle is as follows:

1. Dehydrogenation reaction: aromatic compounds react with water vapor to generate corresponding dehydrogenation products under high temperature and low pressure conditions.

2. Condensation reaction: The dehydrogenation product undergoes a condensation reaction to generate polycyclic aromatic hydrocarbons, including petroleum naphthalene, under the action of an acidic catalyst.

4. Process

The manufacturing process of petroleum naphthalene mainly includes the following steps:

1. Raw material pretreatment: pretreatment of petroleum cracking products such as desulfurization and dehydration to ensure the normal operation of the reactor and the quality of the product.

2. Reaction: The pretreated raw materials are sent into the reactor, and dehydrogenation condensation reaction is carried out under high temperature and low pressure conditions to generate petroleum naphthalene and polycyclic aromatic hydrocarbons.

3. Separation: The product in the reactor was cooled and separated to obtain crude petroleum naphthalene.

4. Refining: Refining crude petroleum naphthalene to obtain petroleum naphthalene products with high purity.

5. equipment selection

In the manufacturing process of petroleum naphthalene, the equipment that needs to be used includes reactors, separators, coolers, refining equipment, etc. When selecting equipment, it is necessary to choose according to the requirements of the process and the characteristics of the product to ensure the reliability of the equipment and the quality of the product.
Precautions for operation of
6.

In the manufacturing process of petroleum naphthalene, the following operation items need to be paid attention to to ensure the safety of production and product quality:

1. Strictly control the reaction temperature and pressure to avoid excessive temperature and Pressure causes damage to equipment.

2. Regularly check the operating status of the equipment, and find and solve equipment failures in time.

3. Keep the equipment clean and hygienic to avoid the influence of sundries on product quality.

4. Strengthen the safety management of the production site, abide by the relevant safety regulations, and ensure the safe and smooth production.

7. conclusion

petroleum naphthalene as an important chemical production raw material, its manufacturing method involves raw material selection, reaction principle, process flow, equipment selection and other aspects. In the production process, it is necessary to strictly control the operating conditions and equipment operating conditions, and comply with relevant safety regulations to ensure product quality and production safety and smooth progress.

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