Process and apparatus for the production of light olefins and aromatics from an aromatic-containing light crude oil

By performing pretreatment, fractionation, cracking, and hydrotreating on light crude oil, the problem of the impact of aromatic components in light crude oil on the yield of low-carbon olefins has been solved, achieving efficient production of low-carbon olefins and aromatics, and optimizing the processing flow and economic benefits.

CN117720947BActive Publication Date: 2026-06-26CHINA NAT PETROLEUM CORP +1
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Patent Information

Application Number
CN202311841335.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-28
Publication Date
2026-06-26
Estimated Expiration
2043-12-28

AI Technical Summary

Technical Problem

In existing technologies, the high content of aromatic components in light crude oil leads to low yield of low-carbon olefins and severe coking, affecting the operation cycle of the unit.

Method used

The process of processing light crude oil is optimized through steps such as pretreatment, feed fractionation, cracking, hydrotreating and aromatic extraction, which reduces aromatic content and increases the yield of low-carbon olefins. This includes technologies such as dehydration, demetallization, desalting, desulfurization, dearomatic removal, cracking, hydrotreating and aromatic separation.

Benefits of technology

It significantly improved the yield of low-carbon olefins and aromatics, extended the operating cycle of the unit, reduced construction investment costs, expanded the selection of raw materials, and improved economic benefits.

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Abstract

The application provides a method and device for preparing low-carbon olefins and aromatic hydrocarbons from aromatic hydrocarbon-containing light crude oil, which comprises the following steps: pretreating the aromatic hydrocarbon-containing light crude oil to obtain pretreated crude oil, subjecting the pretreated crude oil to raw material fractionation treatment to obtain a cracking unit feed stream, subjecting the cracking unit feed stream to cracking treatment to obtain a cracking product stream and a first residual oil stream; discharging the first residual oil stream, subjecting the cracking product stream to product separation treatment to obtain a separation product stream and a cracking gasoline stream; subjecting the cracking gasoline stream to gasoline hydrogenation treatment to obtain a hydrogenated cracking gasoline stream, subjecting the hydrogenated cracking gasoline stream to aromatic hydrocarbon extraction treatment to obtain a fourth aromatic hydrocarbon-rich stream, and subjecting the fourth aromatic hydrocarbon-rich stream to aromatic hydrocarbon separation treatment to obtain an aromatic hydrocarbon separation product stream. Compared with a traditional refining and chemical integration process, the technical scheme of the application greatly shortens the processing flow and can maximize the yield of low-carbon olefins and aromatic hydrocarbons from the aromatic hydrocarbon-containing light crude oil.
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