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

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The manufacturing method
of diisopropylbenzene
1. Introduction

diisopropylbenzene is an important chemical production raw material, widely used in medicine, pesticides, spices and other fields. With the increasing market demand, the manufacturing method of diisopropylbenzene has become a research hotspot. This paper will introduce the manufacturing method of dicumyl in detail, including raw material preparation, reaction process, post-treatment and so on.

2. raw material preparation

The main raw materials for the manufacture of diisopropylbenzene are benzene and propylene. In order to ensure the smooth progress of the reaction, the raw materials need to be pretreated. First, the benzene needs to be dried to remove the water in it. Secondly, propylene needs to be purified to remove impurities therein.

3. reaction process

1. Alkylation reaction

The dried benzene and purified propylene are mixed according to a certain proportion, and the catalyst is added to carry out the alkylation reaction. Alkylation reaction is a reaction in which the hydrogen atoms on the benzene ring are replaced by alkyl groups, and products such as monoisopropylbenzene and diisopropylbenzene can be obtained. In this reaction process, it is necessary to control the reaction temperature and pressure to ensure the smooth progress of the reaction.

2. Separation and purification
After the
alkylation reaction is completed, the reaction product needs to be separated and purified. First, unreacted benzene and propylene were separated by distillation to obtain crude dicumyl. Then, diisopropylbenzene was further purified by rectification to remove impurities therein.

4. post-treatment

dicumyl needs further post-treatment to ensure its quality and purity. In the post-treatment process, decolorization, dehydration and other treatments are required to remove impurities such as pigment and water. The treated dicumyl needs to be inspected for quality and can only be used after meeting the standards.

5. precautions

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

1. Control the reaction temperature and pressure to ensure the smooth progress of the reaction;
2. Pretreat the raw materials to remove the water and impurities;
3. In the process of separation and purification, it is necessary to ensure the sealing performance of the equipment to avoid product volatilization and leakage;
4. In the post-processing process, it is necessary to use suitable decolorizing agent and desiccant to ensure the quality and purity of the product.

6. conclusion

diisopropylbenzene is an important raw material for chemical production, and its manufacturing method needs to control the reaction conditions and the quality of raw materials to ensure the smooth progress of the reaction and the purity of the product. Through reasonable process design and operation, high-quality dicumyl can be produced to meet the needs of the market.

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