A crude oil processing method and system for producing all chemical products

By separating and multi-step catalytic cracking of crude oil, the refinery process was optimized, increasing the yields of ethylene, propylene, and C6-C8 aromatics. This solved the problem of low chemical yields in existing technologies, enabling the production of all chemical products and improving resource utilization efficiency.

CN119912975BActive Publication Date: 2025-11-14CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202311425903.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-30
Publication Date
2025-11-14
Estimated Expiration
2043-10-30

AI Technical Summary

Technical Problem

The existing crude oil processing methods used in refineries have low yields of ethylene, propylene, and C6-C8 aromatics, which cannot meet the growing demand for organic chemical feedstocks. In addition, there is a surplus of refined oil products, making it difficult for refineries to transform into chemical companies.

Method used

By separating crude oil and then subjecting it to hydrotreating, catalytic cracking, and hydrorefining processes, including atmospheric separation, residue hydrotreating, catalytic cracking, ethane cracking, and propane dehydrogenation, the processing flow of each fraction is optimized to improve the yield of chemical products.

Benefits of technology

It increased the yields of ethylene, propylene, and C6-C8 aromatics, maximized the production of chemical products, reduced the production of oil products, improved resource utilization efficiency, and met the demand for chemical raw materials.

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Abstract

This invention relates to a crude oil processing method for producing a full range of chemical products. The method involves hydrocracking gasoline, second cracked gasoline, and third cracked gasoline, followed by cracked gasoline hydrotreating and extraction to obtain C6-C8 aromatics. First, second, and third cracked dry gas are then subjected to ethane cracking to obtain ethylene. First, second, and third cracked liquefied petroleum gas (LPG), along with the LPG, LPG, and LPG, are then subjected to gas separation to obtain a first stream of propylene, propane, and a C4 mixture. Finally, propane is subjected to propane dehydrogenation to obtain a second stream of propylene. This invention achieves catalytic cracking of each fraction of crude oil, improving resource utilization efficiency and facilitating the maximization of low-carbon olefins and C6-C8 aromatics production, thereby increasing the yield of these products.
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