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Catalytically cracked gasoline deep desulfurization combined technique

A catalytic cracking gasoline, deep desulfurization technology, applied in the petroleum industry, hydrotreating process, hydrocarbon oil treatment, etc., can solve the problems of large octane loss, desulfurization rate decline, low product liquid yield, etc., to achieve high desulfurization depth , mature catalyst and high liquid yield

Inactive Publication Date: 2015-04-01
XI'AN PETROLEUM UNIVERSITY
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AI Technical Summary

Problems solved by technology

However, these methods still have disadvantages such as large loss of octane number, incomplete removal of secondary mercaptans resulting in decreased desulfurization rate, or low product liquid yield.

Method used

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  • Catalytically cracked gasoline deep desulfurization combined technique
  • Catalytically cracked gasoline deep desulfurization combined technique
  • Catalytically cracked gasoline deep desulfurization combined technique

Examples

Experimental program
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Embodiment 1

[0032] The whole-fraction catalytic cracking stable gasoline raw material A is mixed with hydrogen B, and then enters the fixed-bed reactor 1 filled with mercaptan etherification reaction catalyst, at a reaction pressure of 0.5-3.5MPa, a temperature of 60-180°C, and a space velocity of 1-10h -1, Under the condition of hydrogen-to-oil volume ratio of 0.5-20, the thioetherification reaction between mercaptans and olefins or diolefins occurs, and the mercaptans are converted into heavy sulfides, while the diolefins are selectively hydrogenated into monoolefins. After the reaction, the gasoline enters a rectification tower to cut the whole distillate gasoline into light and heavy parts, wherein the cutting point temperature is 65°C, and the top of the tower is the olefin-rich and sulfur-free light gasoline component. The heavy distillate at the bottom of the tower is mixed with hydrogen C and then enters the selective hydrogenation reactor. The reaction pressure is 0.5-3.5MPa, the ...

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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.

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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Application Information

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IPC IPC(8): C10G67/00
CPCC10G67/00C10G2400/02
Inventor 张君涛申志兵梁生荣
Owner XI'AN PETROLEUM UNIVERSITY
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