Manufacturing method of diisopropylbenzene
I. Introduction
Diisopropylbenzene is an important raw material for the production of chemicals, which is widely used in the fields of pharmaceuticals, pesticides and spices. With the increasing market demand, the manufacturing method of diisopropylbenzene has become a hot spot of research. In this paper, the manufacturing method of diisopropylbenzene will be introduced in detail, including raw material preparation, reaction process, post-treatment and so on.
II. Raw material preparation
The main raw materials for manufacturing diisopropylbenzene are benzene and propylene. In order to ensure the smooth progress of the reaction, the raw materials need to be pre-treated in some way. Firstly, benzene needs to be dried to remove the water in it. Secondly, propylene needs to be purified to remove the impurities.
III. Reaction process
1. Alkylation reaction
The dried benzene and purified propylene are mixed according to a certain ratio, and a catalyst is added to carry out the alkylation reaction. Alkylation reaction is a reaction in which the hydrogen atom on the benzene ring is replaced by an alkyl group, and products such as monoisopropylbenzene and diisopropylbenzene can be obtained. During this reaction, the reaction temperature and pressure need to be controlled to ensure the smooth progress of the reaction.
2. Separation and purification
After the alkylation reaction is completed, the reaction products need to be separated and purified. First, the unreacted benzene and propylene are separated by means of distillation to obtain crude diisopropylbenzene. Then, diisopropylbenzene is further purified by means of distillation to remove the impurities therein.
IV. Post-treatment
The obtained diisopropylbenzene needs to be further post-treated to ensure its quality and purity. In the post-treatment process, decolorization and dehydration are required to remove the impurities such as pigment and water. The treated diisopropylbenzene needs to undergo quality inspection and meet the standard before leaving the factory for use. V. Precautions
In the process of manufacturing diisopropylbenzene, 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 separating and purifying, it is necessary to ensure the sealing performance of the equipment, to avoid the volatilization of the product and the leakage;
4. In the process of post-processing, it is necessary to use suitable decolorant and desiccant to ensure the quality and purity of the product.
VI. Conclusion
Diisopropylbenzene is an important raw material for the production of chemicals, 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 diisopropylbenzene can be manufactured to meet the market demand.
