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Deep desulfurization method for gasoline

A deep desulfurization and gasoline technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems that it is difficult to realize deep desulfurization and reduce the loss of octane number at the same time, and the desulfurization method is complicated to operate, so as to avoid The loss of alkane number, reducing the desulfurization load, and satisfying the effect of deep desulfurization

Inactive Publication Date: 2015-12-23
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The invention provides a deep desulfurization method for gasoline, which is used to solve the technical defects of the desulfurization method in the prior art, such as complicated operation and difficulty in realizing deep desulfurization and reducing octane loss at the same time.

Method used

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  • Deep desulfurization method for gasoline
  • Deep desulfurization method for gasoline
  • Deep desulfurization method for gasoline

Examples

Experimental program
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Effect test

Embodiment 1

[0093] 1. Preparation of selective hydrodesulfurization catalyst

[0094] CoSO first 4 The solution impregnates the ZSM-5 molecular sieve (carrier) with an equal volume, and after washing, drying and roasting, the (NH 4 ) 6 Mo 7 o 24. 4H 2 O aqueous solution on the impregnated CoSO 4 The ZSM-5 type molecular sieve in the solution is impregnated with equal volume, and after washing, drying and roasting, a selective hydrogenation desulfurization catalyst is prepared.

[0095] The total specific surface area of ​​the selective hydrodesulfurization catalyst prepared above is 168m 2 / g, the total pore volume is about 0.378mL / g, the loading amount of Co on the carrier is about 7%, the loading amount of Mo on the carrier is about 10%, and the mass ratio of Co and Mo loaded on the carrier is 0.7 :1.

[0096] 2. Gasoline desulfurization

[0097] Using catalytic gasoline produced by Daqing atmospheric heavy oil through catalytic cracking as raw material (see Table 1 for its com...

Embodiment 2

[0121] This embodiment is improved on the basis of Embodiment 1, where the difference is:

[0122] Carry out adsorption desulfurization to the light fraction raffinate oil of embodiment 1, obtain light fraction adsorption desulfurization oil and light fraction sulfur-rich oil; and carry out adsorption desulfurization to the heavy fraction raffinate oil of embodiment 1, obtain heavy fraction adsorption desulfurization oil and heavy fraction oil Distillate sulfur-rich oil. Subsequently, the light fraction sulfur-rich oil, the heavy fraction sulfur-rich oil, the light fraction extract oil and the heavy fraction extract oil of Example 1 are combined and then selectively hydrodesulfurized to obtain a desulfurized fraction. The process flow is as follows figure 2 shown.

[0123] The desulfurization adsorbent is used for the above-mentioned adsorption desulfurization. The desulfurization adsorbent is obtained by carrying the active metal components on the ZSM-5 molecular sieve and ...

Embodiment 3

[0128] In addition to extractive distillation, the theoretical plate number of the extractive distillation tower is 25, the temperature of the top of the extractive distillation tower is about 80°C, the temperature of the bottom of the tower is about 150°C, and the absolute pressure of the top of the tower is about 0.2MPa. The material ratio is about 0.5, and the separation degree of olefins and aromatics in the extractive distillation tower reaches about 80% at this time;

[0129] In adsorption desulfurization, the service life of the desulfurization adsorbent is 3.4h, and the adsorption desulfurization efficiency reaches about 84%. The rest are the same as in Example 2 to obtain desulfurized gasoline with a yield of 94%. The composition is shown in Table 1.

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Abstract

The invention provides a deep desulfurization method for gasoline. The method comprises steps as follows: cutting a gasoline raw material into a light fraction and a heavy fraction; performing liquid-liquid extraction on the light fraction to obtain light fraction raffinate containing alkenes and light fraction extract oil containing sulfides and arenes; performing extractive distillation on the heavy fraction to obtain heavy fraction raffinate containing alkenes and heavy fraction extract oil containing sulfides and arenes; performing selective hydrodesulfurization on the light fraction extract oil and the heavy fraction extract oil to obtain a desulfurized fraction; mixing the light fraction raffinate, the heavy fraction raffinate and the desulfurized fraction to obtain desulfurized gasoline, wherein the cutting temperature of the light fraction and the heavy fraction is 80-120 DEG C. With the adoption of the deep desulfurization method for the gasoline, deep desulfurization can be realized, meanwhile, the octane number loss of a gasoline product can be significantly reduced, the desulfurization load can be reduced substantially, and the product yield is higher than 95%.

Description

technical field [0001] The invention relates to a gasoline desulfurization method, in particular to a gasoline deep desulfurization method. Background technique [0002] As people pay more and more attention to environmental protection, the new environmental protection regulations of various countries in the world have stricter requirements on the quality of gasoline. For example, my country's national V motor gasoline standard that will be implemented on January 1, 2017 will require the olefin content to be below 25%, and the sulfur content to be below 10ppm; ); Europe requires that the sulfur content of gasoline should be lower than 50ppm (Euro IV emission standard). Therefore, it is necessary to carry out deep desulfurization of gasoline to meet the relevant requirements. [0003] Adsorption desulfurization has little effect on the octane number of gasoline products while removing sulfide in gasoline raw materials, so it is one of the more potential desulfurization metho...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 高金森赵亮郝天臻韩晓娜李海争蓝兴英王成秀
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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