The olefin process involves several key steps, and the following is a brief overview:
First, the production of olefin is usually carried out by hydrocarbon cracking. This method uses naphtha, liquefied petroleum gas, ethane, etc., as raw materials, under high temperature and low pressure conditions, the hydrocarbon compounds are split into smaller molecules, thus generating olefin. Hydrocarbon cracking method has high economic efficiency in producing low carbon olefins such as ethylene and propylene.
Next, after a cracking reaction, the resulting product is a complex mixture containing olefins and other components. At this time, the target product olefin needs to be extracted from the mixture by separation and refining processes. Separation is one of the key steps in the olefin process, and the commonly used separation methods include distillation, adsorption and extraction. In the distillation process, the components of different boiling points in the mixture are separated by adjusting the temperature and pressure and so on, so as to obtain a higher purity olefin product.
Refining is the last step in the olefin process, and its purpose is to improve the purity and quality of olefin products. The refining process includes steps such as desulfurization, nitrogen removal, dehydration and degassing. Desulphurization is the process of removing sulfide from olefin products. The commonly used methods include oxidative desulphurization and adsorption desulphurization. Nitrogen removal is the process of removing nitride from olefin products. The commonly used methods include adsorption and oxidation. Dehydration is the process of removing water from olefin products, commonly used methods include steam dehydration and adsorption dehydration. Degassing is the process of removing impurity gas from olefin products. The commonly used methods include adsorption degassing and cooling degassing.
In addition, there are other methods for the production of olefin, such as alcohol dehydrogenation, aldehyde condensation, Williamson synthesis, wax cracking, ethylene oligomerization and vegetable oil. These methods have their own characteristics and are suitable for different production needs.
In general, the process flow of olefin is a complex and delicate process that requires strict process control and equipment support. Through these process steps, olefin products can be efficiently extracted from raw materials, providing important basic raw materials for the development of the chemical industry.
