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Low-energy consumption catalytic gasoline hydrodesulfurization method

A catalytic gasoline and hydrodesulfurization technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of different process flow and poor adaptability of feedstock oil, and reduce investment and operating costs, as well as equipment investment and operating costs, the effect of reducing energy consumption

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • 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, the raw material oil has poor adaptability, and the process flow is completely different from the idea of ​​the present invention

Method used

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  • Low-energy consumption catalytic gasoline hydrodesulfurization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The gasoline raw material 1 is pre-separated in the fractionation tower of the catalytic cracking unit to obtain light fractions and heavy fractions. The cut point temperature of the light fractions and heavy fractions is 80°C; Separation is carried out in a fractionating tower, and the cut point temperature of the obtained light gasoline and medium gasoline is 65°C. Among them, the conversion reaction conditions of hydrogen mercaptans are: hydrogen partial pressure 2.0 MPa, volume space velocity 4.8 h -1 , The reaction temperature is 148°C, the volume ratio of hydrogen to oil is 12; 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.

[0038] The operating conditions and test results are listed in Table 2 and Table 3, respectively.

[0039] It can be seen from Table 3 that using this technology can reduce the sulfur content...

Embodiment 2

[0041] The gasoline raw material 2 is pre-separated in the fractionation tower of the catalytic cracking unit to obtain light fractions and heavy fractions; the cut point temperature of the light fractions and heavy fractions is 78°C; the light fractions undergo hydromercaptan conversion and then enter hydrogenation pre-fractionation The tower is separated, and the cut point temperature of the obtained light gasoline and medium gasoline is 63°C. The reaction conditions for the conversion of hydrogen mercaptans are: hydrogen partial pressure 2.2 MPa, volume space velocity 5.4 h -1 , the reaction temperature is 157°C, the volume ratio of hydrogen to oil is 18; 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.

[0042] The operating conditions and test results are listed in Table 2 and Table 3, respectively.

[0043] It can be seen...

Embodiment 3

[0045] The gasoline raw material 3 is pre-separated in the fractionation tower of the catalytic cracking unit to obtain light fractions and heavy fractions; the cut point temperature of the light fractions and heavy fractions is 85°C; the light fractions undergo hydromercaptan conversion, and then enter the hydrogenation pre- Separation is carried out in a fractionating tower, and the cut point temperature of the obtained light gasoline and medium gasoline is 68°C. Among them, the conversion reaction conditions of hydrogen mercaptans are: hydrogen partial pressure 1.8 MPa, volume space velocity 4.5 h -1 , the reaction temperature is 152°C, the volume ratio of hydrogen to oil is 26; the hydrodesulfurization reaction conditions are: 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.

[0046] The operating conditions and test results are listed in Table 2 and Table 3, respectively. ...

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Abstract

The invention discloses a low-energy consumption catalytic gasoline hydrodesulfurization method. The method comprises: adjusting the operating conditions of a catalytic cracking device fractionating tower, and adopting an appropriate cutting point to perform pre-separation in an FCC (fluid catalytic cracking) fractionating tower so as to obtain light fractions and heavy fractions; subjecting the mercaptan in the light fractions to hydroconversion to form a heavy sulfide, making the treated light fractions enter a hydrogenation prefractionator to fractionate light gasoline and medium gasoline, mixing the medium gasoline with the heavy fractions generated by the FCC fractionating tower, letting the mixture enter a hydrodesulfurization reactor to undergo deep desulfurization, conducting steam stripping on the obtained refined heavy gasoline, and mixing it with the light gasoline, 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 method for hydrodesulfurization of catalytic gasoline with low energy consumption, in particular to a method for hydrogenating catalytic gasoline as a raw material to produce clean gasoline blending components 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, Gua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 徐大海关明华丁贺段为宇
Owner CHINA PETROLEUM & CHEM CORP
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