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[Chemical Knowledge]：Manufacturing method and process of light circulating oil

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Light cycle oil (LCO) is a feedstock widely used in the production of chemicals and is mainly composed of hydrocarbons. The following is a typical manufacturing method of light cycle oil:

1. raw materials to prepare

1. Crude oil: Select high-quality crude oil as raw materials to ensure the quality and yield of the final product.
2. Catalyst: Select the appropriate catalyst to promote the reaction process.

2. pretreatment

1. Crude oil desulfurization: In order to reduce the sulfur content in crude oil, desulfurization treatment is required. This can be achieved by adding a desulfurizing agent and heating to an appropriate temperature.
2. Dehydration: The water in the crude oil is removed by heating and vacuum treatment.

3. Catalytic Cracking

1. The pretreated crude oil is mixed with a catalyst and then fed to a cracking reactor.
2. In the cracking reactor, crude oil is cracked under the action of a catalyst to produce light cycle oil and other by-products.

4. Fractionation

1. The product in the cracking reactor is sent to the fractionation tower, and the components with different boiling points are separated by heating and cooling.
2. By adjusting the operating parameters of the fractionating column, the yield and quality of light cycle oil can be optimized.

5. post-treatment

1. Catalyst regeneration: The used catalyst is sent to the regenerator to restore the activity of the catalyst through coking and oxidation.
2. Product refining: According to needs, the light cycle oil can be further refined to improve its purity and quality.

above is a typical manufacturing method of light cycle oil, and the specific process parameters and operating conditions may vary with different equipment and raw materials. In the actual production process, it is necessary to optimize and adjust according to the specific situation to ensure the quality and yield of the product.

In addition, the manufacturing process of light cycle oil requires attention to safety and environmental protection issues. Appropriate measures should be taken to prevent the occurrence of safety accidents such as leakage and fire, while reducing the discharge of exhaust gas, waste water and solid waste, and protecting the environment.

In short, the manufacture of light cycle oil requires a certain amount of chemical knowledge and technology, as well as strict compliance with relevant safety and environmental regulations to ensure the smooth progress of the production process and the sustainable development of the social environment.

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