Gasoline desulfurization method

A gasoline and heavy gasoline technology, applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon oil treatment products, etc., can solve the problem of gasoline octane number loss and achieve the effect of reducing sulfur content

Active Publication Date: 2018-10-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when dealing with gasoline feedstock with high olefin content and high sulfur content, it still causes a large loss of gasoline octane number

Method used

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  • Gasoline desulfurization method
  • Gasoline desulfurization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0043] In a specific embodiment, based on the dry weight of the adsorption desulfurization catalyst and based on the weight of the oxide, the zinc oxide in the adsorption desulfurization catalyst accounts for 10-90% by weight, and the silica accounts for 5-85% by weight. %, alumina accounts for 5-30% by weight; based on the dry basis weight of the adsorption desulfurization catalyst and based on element weight, the content of the desulfurization active metal in the adsorption desulfurization catalyst is 5-30% by weight.

[0044] A specific implementation of the present invention will be provided below in conjunction with the accompanying drawings, but the present invention is not limited thereby.

[0045] Such as figure 1 As shown, the gasoline fraction enters the gasoline raw material cutting tower 1 through the line 7, and the light gasoline fraction obtained at the top of the tower is introduced into the first set of fluidized reactor 2 through the line 8, and is mixed with the ...

Embodiment 1

[0052] The gasoline fraction used in Example 1 is refinery stable gasoline A, and its properties are listed in Table 1. Such as figure 1 As shown, the stable gasoline A is distilled in the gasoline raw material cutting tower 1 to cut into light gasoline fraction and heavy gasoline fraction, and the final boiling point of the first light gasoline fraction is controlled to be 65-70°C (according to ASTM D86 standard). Among them, the light gasoline fraction obtained by cutting stable gasoline A is recorded as LCN-A, and the heavy gasoline fraction is recorded as HCN-A, and the properties are listed in Table 2. The heavy gasoline fraction HCN-A is sent to the first set of fluidization reactor 4 Contact with the adsorption desulfurization catalyst FCAS and carry out the first desulfurization reaction in the presence of hydrogen. The reaction conditions are listed in Table 4. The reaction product obtained from the top of the reactor is cooled and separated to obtain the tail gas and...

Embodiment 2

[0054] The operation of Example 2 is basically the same as that of Example 1, except that the temperature of the second desulfurization reaction is controlled to 410° C. to obtain a gasoline product. The properties are shown in Table 5.

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Abstract

The invention relates to a gasoline desulfurization method. The gasoline desulfurization method comprises the following steps: subjecting a raw gasoline material to cutting so as to obtain a light gasoline fraction and a heavy gasoline fraction; conveying the first heavy gasoline fraction into a first set of fluidization reactor for contacting with an adsorption desulfurization catalyst and carrying out a first desulfurization reaction in the presence of hydrogen so as to obtain a first desulfurization product; and conveying the obtained light gasoline fraction into a second set of fluidization reactor for contacting with the adsorption desulfurization catalyst and carrying out a second desulfurization reaction so as to obtain a second desulfurization product, wherein a first reaction temperature and a first reaction pressure in the first desulfurization reaction are 380 to 470 DEG C and 2.0 to 3.5 MPa, respectively, and a second reaction temperature and a second reaction pressure in the second desulfurization reaction are 360 to 450 DEG C and 1.5 to 3.0 MPa, respectively. The method provided by the invention can reduce the contents of sulfur and olefins in gasoline, decrease the octane number loss of the gasoline and maintain high gasoline yield.

Description

Technical field [0001] The invention relates to a method for desulfurization of gasoline. Background technique [0002] Air pollution caused by automobile exhaust emissions is becoming more and more serious. As people pay more and more attention to environmental protection, my country has accelerated the pace of upgrading vehicle fuel quality. The national standard GB17930-2013 requires that the sulfur content in gasoline is not more than 10μg / g and the olefin volume fraction is not more than 24%. [0003] FCC gasoline is the main component of motor gasoline in my country, accounting for about 75% of the gasoline pool, and it is characterized by high olefin and sulfur content. It is not difficult to use hydrogenation technology to achieve deep desulfurization of gasoline and reduce the content of olefins in FCC gasoline. However, since olefins are high-octane components, a substantial reduction in their content will result in a serious loss of gasoline octane number, thereby affec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/04
CPCC10G45/04C10G2300/202C10G2300/70C10G2400/02
Inventor 王新许友好白旭辉
Owner CHINA PETROLEUM & CHEM CORP
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