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[Chemical Knowledge]：The production and manufacturing method and process of two-naphthol.

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The manufacturing method
of dinaphthol
1. Introduction

dinaphthol is an important chemical production raw material, widely used in medicine, pesticides, dyes, plastics and other fields. Therefore, it is of great significance to study the manufacturing method of dinaphthol for improving product quality, reducing costs and promoting industrial development. This paper will introduce the manufacturing method of two naphthol in detail, including raw material selection, reaction principle, process flow, equipment selection and so on.

2. raw material selection The main raw material for the manufacture of dinaphthol by

is naphthalene, which is an ideal raw material choice due to its wide range of sources and relatively low price. In addition, it is also necessary to use some auxiliary raw materials, such as acid, alkali and other catalysts, as well as solvents, oxidants and the like.

3. reaction principle

dinaphthol is mainly produced by the oxidation reaction of naphthalene. Specifically, naphthalene is oxidized by an oxidizing agent under acidic conditions to produce products such as dinaphthol and carbon dioxide. This reaction belongs to the oxidation reaction of aromatic hydrocarbons. During the reaction, certain conditions such as temperature, pressure and pH need to be controlled to ensure the smooth progress of the reaction and the purity of the product.

4. Process
The manufacturing process of
two naphthol mainly includes the following steps:

1. Ingredients: naphthalene, oxidant, catalyst and other raw materials are added to the reactor in a certain proportion.

2. Reaction: Under the conditions of specified temperature, pressure and pH, the oxidation reaction is carried out to generate products such as dinaphthol and carbon dioxide.

3. Separation: The reaction product is separated to obtain crude dinaphthol and waste liquid, etc.

4. Refining: Refining the crude dinaphthol to obtain a higher purity dinaphthol product.

5. equipment selection

in the manufacturing process of two naphthol, need to use some key equipment, such as reactor, separation tower, refining equipment. The selection of these equipment needs to be comprehensively considered according to the production scale, process requirements, product quality and other factors to ensure the reliability, stability and efficiency of the equipment.

6. Operation Precautions

In the manufacturing process of dinaphthol, the following operation matters need to be paid attention to:

1. Control the reaction temperature and pressure to avoid too high or too low temperature and pressure to adversely affect the reaction.

2. Regularly check the operating status of the equipment, discover and solve equipment failures in time, and ensure the smooth progress of production.

3. Strengthen the treatment of waste water, waste gas and other wastes to avoid pollution to the environment.

7. conclusion

dinaphthol is an important raw material for chemical production, and its manufacturing method involves raw material selection, reaction principle, process flow, equipment selection and so on. In the actual production process, it is necessary to control the operating conditions of each link to ensure product quality and output. At the same time, it is also necessary to strengthen the management of waste and protect the environment.

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