A Combined Process for Deep Desulfurization of Catalytic Cracking Gasoline

A technology for catalytic cracking gasoline and deep desulfurization, which is applied in the petroleum industry, hydrotreating process, and hydrocarbon oil treatment. , The effect of high liquid yield and mature catalyst
CN104479738BInactive Publication Date: 2016-03-09XI'AN PETROLEUM UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI'AN PETROLEUM UNIVERSITY
Publication Date
2016-03-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a catalytically cracked gasoline deep desulfurization method which comprises the following steps: 1. carrying out thiolation reaction, wherein the gasoline is divided into a light component and a heavy component by a rectification tower after reaction; 2. carrying out selective hydrodesulfurization and isomerization on the heavy component; 3. after the selective hydrodesulfurization process, carrying out hydrodesulfurization on secondary mercaptan; 4. etherifying the light gasoline; and 5. finally, blending the light and heavy components to obtain the ultralow-sulfur gasoline product which conforms to the national V gasoline quality standard. The technique is suitable for hydrogenation modification of the catalytically cracked gasoline, and has the advantages of high desulfurization percent, high liquid yield, high catalyst stability of all units, long service life and no discharge of caustic sludge in the whole process.
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Description

technical field

[0001] The invention relates to a method for producing clean gasoline products; more specifically, it relates to a method for deep desulfurization of catalytic cracking gasoline. Background technique

[0002] With the increase of air pollution, the NOx in the exhaust gas emitted by motor vehicles in various countries x , SO x More stringent restrictions have been put forward for the content of aromatics and aromatics. Especially in recent years, the smog weather in major cities in northern my country has prompted the country to further improve the quality standard requirements of vehicle fuel. Taking motor gasoline as an example, my country has implemented the National IV gasoline standard with a sulfur content of less than 50ppm since January 2014, and plans to implement the National V gasoline standard with a sulfur content of less than 10ppm in January 2018. Big cities led by Shanghai and Shanghai have taken the lead in implementing the National V gasolin...

Claims

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