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

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Dicyclopentadiene (DCPD) is an important chemical raw material, widely used in synthetic rubber, plastics, fine chemicals and other fields. The following is the manufacturing method of dicyclopentadiene, as well as the relevant reaction principle, equipment, operation flow and safety measures.

1. Manufacturing Methods There are two main manufacturing methods

dicyclopentadiene: pyrolysis and catalytic cracking.

1. Pyrolysis

Pyrolysis is to pyrolyze cyclopentadiene (CPD) at high temperature to generate dicyclopentadiene and hydrogen. The reaction principle of the method is as follows:
the
of cyclopentadien→dicyclopentadiene hydrogen

pyrolysis requires high temperature conditions, and is generally carried out by using a tube furnace or a fluidized bed reactor. The reaction temperature is generally between 400 and 600 ° C. and the pressure is between 0.1 and 1.0MPa. The raw material cyclopentadiene is heated to a reaction temperature by a heating furnace, and then pyrolyzed in a reactor to generate dicyclopentadiene and hydrogen. The product was cooled, separated and purified to obtain dicyclopentadiene with high purity.

2. Catalytic cracking method

catalytic cracking method is to crack cyclopentadiene under the action of a catalyst to produce dicyclopentadiene and low-carbon hydrocarbons. The reaction principle of the method is as follows:
the
of cyclopentadiene-dicyclopentadiene low-carbon hydrocarbon

catalytic cracking method is generally carried out by fixed bed or fluidized bed reactor. The reaction temperature is generally between 300 and 500 ° C. and the pressure is between 0.1 and 3.0MPa. The raw material cyclopentadiene contacts with the catalyst, and the cracking reaction is carried out under the action of the catalyst to generate dicyclopentadiene and low carbon hydrocarbons. The product was cooled, separated and purified to obtain dicyclopentadiene with high purity.

2. equipment

dicyclopentadiene manufacturing equipment mainly includes reactors, heaters, coolers, separators and refining equipment. Among them, the reactor is the core equipment for the manufacture of dicyclopentadiene. According to different manufacturing methods, the type and structure of the reactor are also different. Heaters and coolers are used to control the reaction temperature and product cooling, and separators and refining equipment are used for product separation and purification.

3. Operation Process

The manufacturing operation process of dicyclopentadiene is as follows:

1. Add the raw material cyclopentadiene into the reactor;
2. Set the corresponding reaction temperature and pressure according to different manufacturing methods;
3. After the reaction is completed, cool the product to room temperature;
4. Separate and purify the product to obtain dicyclopentadiene with higher purity.

4. safety measures

In the manufacturing process of dicyclopentadiene, the following safety measures need to be paid attention to:

1. Strictly control the reaction temperature and pressure to prevent the occurrence of overtemperature and overpressure;
2. Regularly check the reactor The operation of equipment such as heaters and heaters to ensure the normal operation of equipment;
3. Strengthen on-site inspections and supervision to detect and handle abnormal situations in time;
4. Provide safety training and education to employees to improve their safety awareness and operation skills.

In short, the manufacturing method of dicyclopentadiene needs to be selected according to specific production conditions and requirements, and at the same time, it needs to strictly abide by relevant safety operation procedures and regulations to ensure the safety and stability of the production process.

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