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Hydrogenation and quality improvement method for reducing sulfur and olefin content of inferior gasoline

A technology for olefin content and low-quality gasoline, which is applied in the fields of hydroprocessing, petroleum industry, and hydrocarbon oil treatment. It can solve the problems of poor catalyst activity stability, limited olefin content reduction, and octane loss, so as to avoid octane Value loss, reduced hydrogen consumption, and reduced olefin content

Active Publication Date: 2006-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that the reduction of olefin content is limited, and when a high desulfurization rate is required, the octane number has a certain loss
Therefore, the activity stability of prior art catalyst is relatively poor

Method used

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  • Hydrogenation and quality improvement method for reducing sulfur and olefin content of inferior gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example shows the effect of desulfurization and olefin reduction of inferior FCC gasoline with high sulfur content and high olefin content.

[0031] (1) Selective hydrogenation of feedstock oil

[0032] Reactor A loaded with MoO 3 (9.0wt%)-NiO(4.5wt%)-WO 3 (19.0wt%) / Al 2 o 3 Selective hydrogenation catalysts;

[0033] The reaction pressure is 2.8MPa, the reaction temperature is 180°C, and the volume space velocity is 6.0h -1 , The volume ratio of hydrogen to oil is 600:1.

[0034] Table 1 lists the properties of the full-cut FCC gasoline feedstock and selective hydrogenation products

[0035] project

[0036] (2), raw oil pre-fractionation

[0037] Table 2 lists the properties of light fraction and heavy fraction of FCC gasoline after selective hydrogenation by fractional distillation with 90°C as the cut point.

[0038] project

[0039] (3), light fraction upgrading

[0040] Reactor B is filled with a La 2 o 3 -ZnO / HZSM-5 aromati...

Embodiment 2

[0052] This example shows the effects of desulfurization and olefin reduction of a medium-sulfur, low-quality FCC gasoline with olefin content.

[0053] (1) Selective hydrogenation of feedstock oil

[0054] Reactor A is filled with 0.25wt% Pd / Al 2 o 3 Selective hydrogenation catalysts;

[0055] The reaction pressure is 3.2MPa, the reaction temperature is 130°C, and the volume space velocity is 8.0h -1 , The volume ratio of hydrogen to oil is 600:1.

[0056] Table 6 lists the properties of the full-cut FCC gasoline feedstock and selective hydrogenation products

[0057] project

Full Distillate FCC Gasoline

Selective Hydrogenation Products

Diene value, gI / 100g

Density, g / ml

Sulfur content, μg / g

Mercaptan content, μg / g

Olefin content, v%

Aromatic content, v%

Research octane number, RON

1.45

0.7210

662

30.5

40.5

19.5

93.2

0.03

0.7211

608

12.9

39.2

19.4

93.0

[0058] (2...

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Abstract

The invention relates the hydrogenation reformed method for decreasing the ungraded petrol and alkene content. The method comprises the following steps: selectively hydrotreating the ungraded full fraction petrol, then pre-fractionating, the light cut carried out the reformed reaction of aromatization, isomerization and benzene-alkylation, the heavy cut carried out selective hydrogenation and desulfuration reaction, mixing the reaction product to prepare the end product of cleaning petrol. The said method can manufacture the ungraded petrol raw material to cleaning fuel, and keep the octane number from damaging at the same time of desulfuration. The current techniques all don`t reach the above requirements at the same time. The method can manufacture the ungraded catalytic gasoline, coker gasoline, catalytic gas oil and thermal cracked gasoline into high quality cleaning petrol product.

Description

technical field [0001] The invention relates to a method for hydrogenation upgrading of low-quality gasoline, more specifically, a combined hydrogenation process for reducing the content of sulfur and olefins in catalytic cracking gasoline. Background technique [0002] With the increasingly stringent environmental protection regulations, the air pollution caused by automobile exhaust has attracted increasing attention. Reducing the content of sulfur and olefins in gasoline can greatly reduce the emission of volatile organic compounds (VOCs), nitrogen oxides (NOX), sulfur dioxide and other harmful substances in automobile exhaust. Therefore, countries around the world have formulated their own new standards for clean gasoline marked by low sulfur and low olefination. [0003] The sulfur content in catalytic cracking (FCC) gasoline is generally 200-2000 μg / g, the olefin content is generally 40.0v%-50.0v%, and the research octane number (abbreviated as RON) is generally 90-94...

Claims

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Application Information

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IPC IPC(8): C10G65/06
Inventor 赵乐平方向晨胡永康刘继华李扬庞宏
Owner CHINA PETROLEUM & CHEM CORP
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