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A method for deep desulfurization of gasoline

A technology for deep desulfurization and gasoline, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of complicated operation of desulfurization method, difficult to achieve deep desulfurization and reduce octane loss at the same time, etc. The effect of alkane number loss and desulfurization load reduction

Inactive Publication Date: 2017-06-13
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • A method for deep desulfurization of gasoline
  • A method for deep desulfurization of gasoline
  • A method for deep desulfurization of gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] 1. Preparation of selective hydrodesulfurization catalyst

[0090] 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.

[0091] 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.

[0092] 2. Gasoline desulfurization

[0093] Using catalytic gasoline produced by Daqing atmospheric heavy oil through catalytic cracking as raw material (see Table 1 for its comp...

Embodiment 2

[0117] This embodiment is improved on the basis of Embodiment 1, where the difference is:

[0118] The light fraction raffinate and the middle fraction raffinate of Example 1 are combined into a mixed oil, and then the mixed oil is subjected to adsorption desulfurization to obtain an adsorption desulfurized oil and a sulfur-rich oil, and then the sulfur-rich oil is combined with the light fraction of Example 1 Extracted oil, middle distillate extracted oil and heavy distillate are combined for selective hydrodesulfurization to obtain desulfurized heavy distillate. The process flow is as follows figure 2 shown.

[0119] 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 activated carbon that have been treated with alkali respectively; the mass ratio of the molecular sieve to the activated carbon is 1:1, and the active metal ...

Embodiment 3

[0124] Except for 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 0.9, and the separation degree of olefins and aromatics in the extractive distillation tower reaches about 80% at this time;

[0125] In adsorption desulfurization, the life of the desulfurization adsorbent is 3.6h, and the adsorption desulfurization efficiency reaches about 86%. 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 method for carrying out advanced desulphurization on gasoline. The method comprises the following steps: cutting a gasoline raw material into light fraction, intermediate fraction and heavy fraction; carrying out liquid-liquid extraction on the light fraction to obtain olefin-containing light fraction raffinate oil and light fraction extraction oil containing sulfide and aromatic hydrocarbon; carrying out extraction distillation on the intermediate fraction to obtain olefin-containing intermediate fraction raffinate oil and intermediate fraction extraction oil containing sulfide and aromatic hydrocarbon; carrying out selective hydrodesulfurization on the light fraction extraction oil, the intermediate fraction extraction oil and the heavy fraction to obtain a desulfurized heavy fraction; and mixing the light fraction raffinate oil, the intermediate fraction raffinate oil and the desulfurized heavy fraction to obtain desulfurized gasoline, wherein the cutting temperature of the light fraction and the intermediate fraction is 80-120DEG C, and the cutting temperature of the intermediate fraction and the heavy fraction is 150-170DEG C. The method has the advantages of realization of advanced desulphurization, great reduction of the loss of the octane number of a gasoline product, and great reduction of the desulphurization load, and allows the yield of the product to be greater than 95%.

Description

technical field [0001] The invention relates to a gasoline desulfurization method, in particular to a method for deeply desulfurizing gasoline. 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] Hydrodesulfurization is the most effective method for removing sulfur compounds from gasoline. Among them, the FCC gasoline selective hydrodesulfurization process (RSDS-I) developed by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 赵亮高金森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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