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[Chemical Knowledge]：Production and manufacturing method and process of mixed aromatics

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Manufacturing method
of mixed aromatics
mixed aromatics is an important raw material for chemical production, which is widely used in plastics, rubber, fiber, fuel and other fields. This article will introduce a manufacturing method of mixed aromatics, which includes the steps of raw material preparation, reaction process, product separation and purification.

1. Feedstock Preparation

The main feedstock for the manufacture of mixed aromatics is petroleum hydrocarbons, such as naphtha, reformate, etc. These feedstocks mainly contain alkanes, cycloalkanes and small amounts of aromatics. In order to ensure the smooth progress of the reaction, the raw materials need to be pretreated, such as desulfurization, denitrification, dehydration, etc.

2. reaction process

mixed aromatics manufacturing process mainly uses catalytic reforming technology, the technology is the feed oil under the action of catalyst, through the action of high temperature and hydrogen, so that hydrocarbon molecules fracture and reforming reaction, the generation of aromatics and hydrogen. During the reaction, attention should be paid to the control of reaction temperature, pressure, space velocity and other parameters to ensure the progress of the reaction and the quality of the product.

3. Product Isolation and Purification
After the
reaction is complete, the product needs to be isolated and purified. First, the hydrogen and unreacted raw oil in the product are separated by cooling and separation. Then, by distillation, the mixed aromatics are separated according to the different boiling points to obtain aromatic products with different boiling points. Finally, high purity aromatic products can be obtained by further distillation and crystallization.

in the manufacturing process, need to pay attention to safety and environmental issues. The waste gas and waste water generated in the reaction process need to be effectively treated to avoid harm to the environment and human body. In addition, safety regulations need to be strictly observed during operation to ensure the safety of employees and equipment.

In short, the manufacturing method of mixed aromatics involves multiple links and operation steps, and it is necessary to strictly control the process parameters and quality indicators of each link to ensure the quality and yield of the product. At the same time, it is necessary to pay attention to safety and environmental protection issues to ensure the sustainable development of the production process.

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