A kind of catalytic gasoline hydrodesulfurization method

A hydrodesulfurization and catalytic gasoline technology, which is applied in the fields of hydrotreating process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems of complex process flow and increased energy consumption of the device, and reduce investment and operation costs and energy consumption , Reduce equipment investment and operating costs

Active Publication Date: 2015-09-30
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can also produce gasoline products with a sulfur content less than 10 μg / g, a catalytic gasoline pre-fractionator needs to be set in the device process, which increases the energy consumption of the device, and the process flow is more complicated than the present invention

Method used

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  • A kind of catalytic gasoline hydrodesulfurization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Gasoline is pre-separated in the fractionation tower of the catalytic cracking unit to obtain light fractions and heavy fractions. The separation temperature of the light fractions and heavy fractions is 70°C; the light fractions are subjected to alkali extraction, and the products are used as clean gasoline blending components. It enters the pre-hydrogenation reactor and the selective hydrodesulfurization reactor successively. The prehydrogenation reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 3.8 h -1 , The reaction temperature is 178°C; the hydrodesulfurization reaction conditions are: hydrogen partial pressure 1.6MPa, volume space velocity 2.8h -1 , The reaction temperature is 282°C; the total hydrogen to oil volume ratio is 350:1.

[0037] It can be seen from Table 3 that using this technology can reduce the sulfur content of the product to below 10 μg / g, and the octane number of the product only loses 1.7 units.

Embodiment 2

[0039] Gasoline is pre-separated in the fractionation tower of the catalytic cracking unit to obtain light fractions and heavy fractions. The separation temperature of the light fractions and heavy fractions is 65°C; the light fractions are subjected to alkali extraction, and the products are used as clean gasoline blending components, and heavy fractions It enters the pre-hydrogenation reactor and the selective hydrodesulfurization reactor successively. The prehydrogenation reaction conditions are: hydrogen partial pressure 2.0MPa, volume space velocity 3.5 h -1 , The reaction temperature is 183°C; the hydrodesulfurization reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 3.0 h -1 , The reaction temperature is 288°C; the total hydrogen to oil volume ratio is 380:1.

[0040] It can be seen from Table 3 that using this technology can reduce the sulfur content of the product to below 10 μg / g, and the octane number of the product only loses 1.8 uni...

Embodiment 3

[0042] Gasoline is pre-separated in the fractionation tower of the catalytic cracking unit, and the separation temperature of the light fraction and the heavy fraction is 75°C; the light fraction is subjected to alkali extraction, and the product is used as a clean gasoline blending component, and the heavy fraction enters the pre-hydrogenation reactor successively and selective hydrodesulfurization reactors. The prehydrogenation reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 4.2 h -1 , Reaction temperature 180℃; hydrodesulfurization reaction conditions: hydrogen partial pressure 1.6MPa, volume space velocity 3.2 h -1 , The reaction temperature is 277°C; the total hydrogen to oil volume ratio is 320:1. The properties of raw oil and test results are listed in Table 2.

[0043] It can be seen from Table 3 that using this technology can reduce the sulfur content of the product to below 10 μg / g, and the octane number of the product will only los...

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Abstract

The invention discloses a catalytic gasoline hydrodesulfurization method. The method comprises: adjusting the operating conditions of a catalytic device fractionating tower, adding a lateral line, and adopting an appropriate cutting point to perform cutting so as to obtain gasoline light fractions at the tower top and gasoline heavy fractions at the lateral line; subjecting the light fractions to alkali extraction, carrying out selective hydrodesulfurization on the heavy fractions, and mixing the obtained refined oil with the light gasoline generated by alkali extraction, thus obtaining a clean gasoline product or a blending component. Compared with the existing catalytic gasoline hydrodesulfurization technologies, the method provided in the invention has the advantages that: the equipment energy consumption is significantly reduced, the gasoline octane number loss is small, the gasoline product quality can meet the quality requirement for a sulfur content of less than 10 micrograms / g, and the economic benefits of oil refining enterprises are improved.

Description

technical field [0001] The invention relates to a catalytic gasoline hydrodesulfurization method, in particular to a method for hydrogenating catalytic gasoline as a raw material to produce a clean gasoline blending component with a sulfur content less than 10 μg / g. Background technique [0002] With the increasingly stringent environmental protection regulations, developed countries such as Europe and the United States have successively put forward stricter regulations on the content of sulfur and olefins in motor gasoline. From 2009 onwards, the Euro V emission standard with a sulfur content of less than 10 μg / g will be implemented. my country's requirements for the sulfur content of motor gasoline are becoming more and more stringent. Since January 1, 2008, the gasoline supplied to Beijing has begun to implement the specifications equivalent to Euro IV emission standards, that is, the sulfur content is less than 50 μg / g, and Shanghai, Guangzhou Similar standards will be g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 徐大海关明华李扬牛世坤
Owner CHINA PETROLEUM & CHEM CORP
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