Method for modification by coupling hydrodesulfurization of FCC (Fluid Catalytic Cracking) gasoline and aromatization of liquefied petroleum gas

A gasoline hydrogenation and hydrodesulfurization technology, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of difficult gasoline cleaning, lower gasoline octane number, high catalyzed gasoline sulfur and high olefin content , to achieve the effect of increasing the product octane number without loss, increasing gasoline yield, and high gasoline desulfurization rate
CN103289739AInactive Publication Date: 2013-09-11DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2013-09-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for modification by coupling hydrodesulfurization of FCC (Fluid Catalytic Cracking) gasoline and aromatization of liquefied petroleum gas. All-fraction FCC gasoline is sequentially subjected to selective hydrogenation and preliminary desulfurization treatment to obtain HCN (Hydrogen Cyanide) heavy-component gasoline by fractionation, and the obtained HCN heavy-component gasoline is then subjected to hydrodesulfurization treatment; and the HCN heavy-component gasoline obtained from the hydrodesulfurization treatment and liquefied petroleum gas are co-fed into a fixed bed multi-stage aromatization reactor to recover / improve the octane number of a gasoline product through the processes of polymerization, pyrolysis, aromatization, hydrogen transfer and the like of olefin. The method is applied to the production process of ultra-low sulfur clean gasoline meeting national IV gasoline standard, and especially the ultra-low sulfur clean gasoline meeting national V gasoline standard. As a gradual desulfurization process is adopted, the operation conditions of all the units are mild, the desulfurization process is coupled with a liquefied petroleum gas aromatization process, and therefore the method has the characteristics that the gasoline desulfurization efficiency is high, the octane number loss of a product does not lose and is even increased, the gasoline yield is increased and the reaction process is flexible.
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Description

technical field

[0001] The invention belongs to the technical field of clean vehicle fuel production, and in particular relates to a method for coupled upgrading of FCC gasoline hydrodesulfurization-liquefied gas aromatization. Background technique

[0002] With the rapid development of my country's economy, the demand for oil resources is increasing. In 2010, my country's oil demand reached 455 million tons, of which more than 250 million tons of crude oil and refined oil were imported. The shortage of oil resources has become a bottleneck restricting the sustainable development of my country's economy and society. In the next few decades, the most in short supply of petroleum downstream products will be vehicle transportation fuels, mainly gasoline and diesel (Contemporary Petroleum and Petrochemical, Vol. 17, No. 11, 2009, Countermeasures for the sustainable development of my country's oil refining and petrochemical industries) .

[0003] With the increasing attention to...

Claims

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