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Hydrogenation modification process for low grade gasoline

A technology for hydrotreating and upgrading low-quality gasoline, applied in hydrotreating process, petroleum industry, and aromatics hydrorefining, etc., can solve the problems of lowering the initial reaction temperature of the catalyst, prolonging the operation period of the catalyst, limiting the performance of the catalyst, etc. The effect of reducing equipment investment, low cost and improving service life

Active Publication Date: 2006-11-08
SINOPEC LUOYANG PETROCHEM ENG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the performance of the catalyst is limited and its service life is affected when the activity of catalyst hydrodesulfurization, isomerization and aromatization is taken into account in the prior art, and proposes a process for hydrogenation and upgrading of inferior gasoline, using the process It can reduce the initial reaction temperature of the catalyst, prolong the operation period of the catalyst, and increase the octane number of desulfurized gasoline and the yield of liquid products while desulfurizing and reducing olefins in inferior gasoline

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] FCC gasoline I is fractionated on the true boiling point distillation unit to separate the 1 ) filled with Co-Mo / TiO 2 (No. A), the second reactor (R 2 ) filled with Ni ZSM-5 / TiO 2 (No. B), carry out hydrogenation upgrading on the >65°C fraction, and then mix the upgraded product with the <65°C fraction to produce qualified gasoline products. The chemical composition of the catalyst is shown in Table 1, and the test results are shown in Tables 2-4.

[0031] catalyst

Numbering

Chemical composition, w%

MoO 3

CoO

NiO

WoO 3

* TiO 2

* ZSM-5 / TiO 2

A

B

C

D.

E.

f

G

h

J

K

m

N

15.6

13.2

9.5

12.8

11.2

14.3

8.8

13.6

10.2

14.8

8.0

5.2

3.8

4.5

3.5

5.5

4.5

4.8

5.6

3.8

2.8

3.1

4.5

2.5

2.6

3.5

2.1

...

Embodiment 2

[0040] Using the same raw material oil and cutting scheme as in Example 1, on the medium-sized fixed-bed hydrogenation test device, the first reactor (R 1 ) filled with Mo-Ni / TiO 2 (Code C), the second reactor (R 2 ) filled with Co-Mo ZSM-5 / TiO 2 (No. D), carry out hydrogenation upgrading on the >65°C fraction, and then mix the upgraded product with the <65°C fraction to produce qualified gasoline products. The chemical composition of the catalyst is shown in Table 1, and the test results are shown in Tables 3-4.

[0041] From the data in Table 3, it can be seen that the sulfur content and olefin content of the >65°C fraction are significantly reduced after hydrodesulfurization and aromatization modification under the given catalyst and process conditions, the sulfur content is 55 μg / g, and the olefin content is 1.2v %, the aromatics content increased by 18 percentage points, and the octane number basically did not lose (RON decreased by 0.2 units).

[0042] As can be seen...

Embodiment 3

[0044] Using the same feed oil and catalyst as in Example 1, on a medium-sized fixed-bed hydrogenation test device, the operating conditions were changed to hydrogenate and upgrade the >65°C fraction, and the upgraded product was mixed with the <65°C fraction , so as to produce qualified gasoline products. See Table 3-4 for test results.

[0045] It can be seen from the data in Table 3 that the sulfur content and olefin content of the >65°C fraction are significantly reduced after hydrodesulfurization and aromatization modification under the given catalyst and process conditions, the sulfur content is 51 μg / g, and the olefin content is 3.4%. , the content of aromatics increased by 11 percentage points, the octane number decreased, and the RON decreased by 1 unit.

[0046] As can be seen from the data in Table 4, the sulfur content of product gasoline is 135 μg / g, the olefin content is 19.0v%, and the aromatic content is 27.0v%. Improve, its RON increased by 1 unit, and the y...

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Abstract

The invention discloses a process for hydrogenation and upgrading of low-quality gasoline. The process is as follows: raw gasoline is cut into light fractions and heavy fractions at 60-90°C, wherein the heavy fractions are first mixed with hydrogen and then contacted with a hydrodesulfurization catalyst reaction, and the reacted effluent is then contacted with an aromatization modification catalyst for aromatization modification reaction to obtain a high-octane low-sulfur gasoline fraction; The treated light fractions are mixed to obtain the product gasoline. Using the method of the invention can make the gasoline sulfur content≤150μg / g, olefin content≤20%, aromatic hydrocarbon content≤40%, and RON increase by 1-3 units.

Description

technical field [0001] The invention belongs to the field of hydrocarbon oil refining, and relates to a process for hydrogenation and upgrading of low-quality gasoline, in particular to a process for hydrogenation and upgrading of catalytic cracking gasoline. Background technique [0002] With the increasing awareness of environmental protection, the world's new environmental protection regulations have stricter requirements on the quality of gasoline. As far as my country's gasoline market is concerned, the biggest feature of gasoline products is that catalytic cracking gasoline accounts for a high proportion. About 90% of the olefin content and sulfur content in finished gasoline come from catalytic cracking gasoline, which makes gasoline products in my country far from meeting the sulfur content. New index requirements of ≤150μg / g and olefin content ≤20% by volume. Due to the increasingly heavy crude oil and the continuous expansion of domestic heavy oil (residual oil) ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/00C10G45/02C10G45/44
Inventor 赵晓青刘金龙孙殿成王龙延刘丹禾霍宏敏
Owner SINOPEC LUOYANG PETROCHEM ENG CORP
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