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[Chemical Knowledge]：Production and manufacturing method and process flow of cracking naphthalene fraction

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The manufacturing method
of pyrolysis naphthalene fraction
1. Introduction

pyrolysis naphthalene fraction is an important chemical production raw material, widely used in medicine, pesticides, dyes, plastics and other fields. With the continuous development of science and technology, the manufacturing method of pyrolysis naphthalene fraction is also constantly improved and optimized. This article will introduce a common method for the manufacture of cracked naphthalene fractions.

2. raw materials and equipment

1. raw materials: naphthalene, catalyst (such as alumina, silica gel, etc.), hydrogen.
2. Equipment: cracking furnace, reactor, condenser, separator, etc.

3. Manufacturing Steps

1. Catalyst Activation: The catalyst is activated by introducing hydrogen at high temperature to improve its catalytic activity.
2. Ingredients: The naphthalene is mixed with the catalyst in a certain proportion and then added to the reactor.
3. cracking reaction: the reactor is heated to a certain temperature, so that naphthalene cracking reaction occurs, the formation of cracked naphthalene fraction.
4. Condensation and separation: After the cracking reaction is completed, the gas in the reactor is passed into a condenser to condense it into a liquid. The cracked naphthalene fraction is then separated from unreacted naphthalene and catalyst by a separator.
5. Refining: Refining the cracked naphthalene fraction to remove impurities and obtain a cracked naphthalene fraction with high purity.

4. Precautions

1. Control the reaction temperature and time to avoid excessive cracking to generate unnecessary by-products.
2. Regularly carry out equipment maintenance and overhaul to ensure the normal operation of the equipment.
3. Operators should be professionally trained and familiar with the manufacturing process and operating procedures to ensure safe and smooth production process.

5. conclusion The manufacturing method of

pyrolysis naphthalene fraction involves many links and precautions, and it is necessary to strictly control the reaction conditions and equipment operation status to ensure product quality and production safety. By continuously optimizing the manufacturing method and improving the technical level, the yield and purity of the cracked naphthalene fraction can be further improved, and better raw materials can be provided for the production of chemical products.

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