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Hydrogenation modification process for low grade gasoline

A technology of hydrogenation upgrading and low-quality gasoline, which is applied in the direction of removing heteroatoms through aromatics hydrogenation refining and refining, which can solve the problems of lowering the initial reaction temperature of the catalyst, prolonging the catalyst operation period, and catalyst performance limitations, so as to reduce equipment Low investment, low cost, and improved service life

Active Publication Date: 2005-06-01
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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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] Table 1 Catalyst chemical composition

[0032] Catalyst chemical composition, w%

[0033] No. MoO 3 CoO NiO WoO 3 * TiO 2 * ZSM-5 / TiO 2

[0034] A 15.6 5.2 Margin

[0035] B 5.6 Margin

[0036] C 13.2 3.8 Margin

[0037] D 9.5 3.8 Margin

[0038] E 12.8 4.5 2.8 Margin

[0039] F 11.2 3.1 Margin

[0040] G 14.3 4.5 Margin

[0041] H 8.8 3.5 2.5 Margin

[0042] J 13.6 5.5 2.6 Margin

[0043] K 10.2 4.5 Margin

[0044] M 14.8 4.8 3.5 Margin

[0045] N 8.0 2.1 6.5 Margin

...

Embodiment 2

[0080] 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.

[0081] 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).

[0082] As can be seen...

Embodiment 3

[0084] 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.

[0085] 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.

[0086] 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 inferior gasoline hydrogenating modification process includes cutting the material gasoline at 60-90 deg.c into light fraction and heavy fraction; mixing the heavy fraction with hydrogen, reacting with hydrogenating and desulfurizing catalyst via contact, and reacting the effluent with aromatizing modification catalyst for aromatizing modification to obtain high octane number and low sulfur gasoline fraction; and mixing the modified heavy gasoline fraction with the light fraction or the light fraction after mercaptol eliminating pre-treatment to obtain the product gasoline. The said process makes the gasoline product possess S content not more than 150 ppm, olefin content not more than 20 %, arene content not more than 40 % and 1-3 unit raised RON.

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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IPC IPC(8): C10G45/02C10G45/44
Inventor 赵晓青刘金龙孙殿成王龙延刘丹禾霍宏敏
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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