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A method for gasoline desulfurization

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

Active Publication Date: 2020-10-27
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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  • A method for gasoline desulfurization
  • A method for gasoline desulfurization
  • A method for gasoline desulfurization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0043] A specific embodiment, based on the dry weight of the adsorption desulfurization catalyst and based on the weight of oxides, the zinc oxide in the adsorption desulfurization catalyst accounts for 10-90% by weight, and the silicon dioxide accounts for 5-85% by weight. %, aluminum oxide accounts for 5-30% by weight; based on the dry basis weight of the adsorption desulfurization catalyst and calculated by element weight, the content of the desulfurization active metal in the adsorption desulfurization catalyst is 5-30% by weight.

[0044] A specific embodiment 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 pipeline 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 pipeline 8...

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, cut into a light gasoline fraction and a heavy gasoline fraction, and the final boiling point of the first light gasoline fraction is controlled to be 65-70° C. (carried out according to the ASTM D86 standard). Among them, the light gasoline fraction obtained by cutting the stable gasoline A is marked as LCN-A, and the heavy gasoline fraction is marked as HCN-A, and the properties are listed in Table 2; the heavy gasoline fraction HCN-A is sent to the first set of fluidized reactor 4 Contact with the adsorption desulfurization catalyst FCAS and carry out the first desulfurization reaction in the state 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 t...

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 be 410° C. to obtain a gasoline product, whose 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 gasoline desulfurization. Background technique [0002] Air pollution caused by vehicle 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 the quality of vehicle fuel. The national standard GB17930-2013 requires that the sulfur content in gasoline should not exceed 10 μg / g, and the olefin volume fraction should not exceed 24%. [0003] FCC gasoline is the main component of motor gasoline in my country, accounting for about 75% in the gasoline pool, and its characteristic is that it has high olefin and sulfur content. It is not difficult to use hydrogenation technology to achieve deep desulfurization of gasoline and reduce the olefin content in FCC gasoline, but since olefin is a high-octane component, a large reduction in its content will lead to a serious loss of gasoline octane, thus affecting Du...

Claims

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Application Information

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Patent Type & Authority Patents(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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