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Depth hydrogenation treatment method of faulty gasoline

A low-quality gasoline and deep hydrogenation technology, which is applied in the combined process of upgrading and olefin reduction, and in the field of deep desulfurization of catalytic cracked gasoline, can solve the problems of octane number loss and increased hydrogen consumption, and achieve high desulfurization activity and selectivity. Operation process, avoiding the effect of high hydrogen consumption

Active Publication Date: 2007-01-10
CHINA PETROLEUM & CHEM CORP +2
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AI Technical Summary

Problems solved by technology

If conventional hydrotreating catalysts are used to remove diolefins, the olefins will also have more saturation reactions, which will increase the consumption of hydrogen and have a greater adverse effect on the subsequent upgrading reactions of olefins, and the loss of octane number of products will be relatively large. Big

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The preparation method of the hydrodesulfurization catalyst is any conventional impregnation method. The oxide can be impregnated step by step, preferably co-impregnation; the impregnating solution can be impregnated with the same adsorption amount, or the impregnating solution can be impregnated excessively.

[0016] The aromatization and hydrodesulfurization provided by the invention are carried out in the same high-temperature reactor. The reaction pressure is generally 1.5MPa~4.5MPa, the reaction temperature is generally 360℃~460℃, and the total volume space velocity is generally 1.0h -1 ~5.0h -1 , the volume ratio of hydrogen to oil is generally 200:1~1000:1; the reaction pressure is preferably 2.5MPa~3.5MPa, the reaction temperature is preferably 380°C~420°C, and the total volume space velocity is preferably 2.0h -1 ~4.0h -1 , the volume ratio of hydrogen to oil is preferably 500-700:1.

[0017] Because the temperature of the product at the outlet of the secon...

example 1

[0020] This example is a combined process of selective hydrofinishing / upgrading (aromatization) and hydrodesulfurization.

[0021] The experiment was carried out on a device with two reactors connected in series, the first reactor was filled with MoO 3(12.0wt%)-CoO(4.5wt%) / Al 2 o 3 Selective hydrofinishing catalyst; second reactor charged with a La 2 o 3 -NiO-ZnO / HZSM-5+HBeta aromatization catalyst, the catalyst La 2 o 3 1.0wt%, NiO 2.6wt%, ZnO 1.5wt%, HZSM-5 grain size 20nm ~ 80nm (SiO 2 / Al 2 o 3 Molar ratio 27) content is 35wt%, HBeta grain size is 80nm~150nm (SiO 2 / Al 2 o 3 Molar ratio 33) content is 40wt%. Hydrodesulfurization catalyst is MoO 3 (3.0 wt%)-CoO(1.0 wt%)-ZnO(1.0 wt%) / alumina. The volume ratio of the aromatization catalyst to the hydrodesulfurization catalyst is 15:1. First, pre-sulfurize the catalyst, the vulcanized oil is straight-run gasoline, and the vulcanizing agent is CS 2 , CS 2 The concentration is 1.0v%; the vulcanization pressure is...

Embodiment 2

[0025] Change the hydrodesulfurization catalyst in embodiment 1 into MoO 3 (4.0wt%)-CoO(1.0wt%)-CuO(1.0wt%) / alumina catalyst, the volume ratio of the aromatization modification catalyst is 20:1, the average temperature of the second reactor is 400°C, Others are with embodiment 1. The specific results of the reaction for 500 hours are shown in Table 2.

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Abstract

A process for deeply hydrorefining poor-quality gasoline includes such steps as removing biolefine from FCC full-fraction gasoline at lower temp, and modifying (arylisomerizing) and hydrodesulfurizing at higher temp. The hydrodesulfarizing catalyst is the hydrorefining catalyst containing copper oxide and / or zinc oxide.

Description

technical field [0001] The invention relates to a deep hydrogenation treatment method for low-quality gasoline with high sulfur content and high olefin content, in particular to a combined process of deep desulfurization, upgrading and olefin reduction of catalytic cracking gasoline. Background technique [0002] The air pollution caused by automobile exhaust has attracted more and more attention. Reducing the content of sulfur and olefins in gasoline can greatly reduce volatile organic compounds (VOCs), nitrogen oxides (NO x ), emissions of harmful substances such as sulfur dioxide. Therefore, countries around the world have formulated their own new standards for clean gasoline marked by low sulfur and low olefination. For example, the European IV automobile exhaust standard requires that the sulfur content of clean gasoline in Europe after 2005 be no more than 50 μg / g, and the olefin content be 14v% to 18v%. , the olefin content is not more than 14v%. [0003] The sulf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/06
Inventor 赵乐平胡永康方向晨庞宏李扬王祥生
Owner CHINA PETROLEUM & CHEM CORP
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