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Method for deep desulfurization olefin hydrocarbon reduction of gasoline

A deep desulfurization and olefin technology, applied in refining to remove heteroatoms, etc., can solve the problems of high olefin saturation rate, large loss of octane number, and inability to handle olefin content, etc.

Active Publication Date: 2009-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are problems such as low liquid yield and waste lye treatment in this method.
[0008] For FCC gasoline with high olefin content and low aromatic content, when the existing hydrogenation technology is used for treatment, the olefin saturation rate is high, resulting in a large loss of octane number
Using the above method of cutting gasoline raw materials into light and heavy fractions, the light fraction is sweetened by alkali refining, the heavy fraction is hydrofined, and then the octane number is restored to process FCC gasoline. The liquid yield is low, the mercaptan content rises, and the total sulfur The content cannot be lower than 50μg / g, and there are problems such as waste lye treatment
However, using the above-mentioned adsorption desulfurization method alone cannot treat FCC gasoline with high olefin content.

Method used

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  • Method for deep desulfurization olefin hydrocarbon reduction of gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Compared with the comparative example, under the condition of the same raw materials, the mixture of gasoline fraction, hydrogen and hydrogenation adsorption catalyst and olefin aromatization catalyst is contacted to carry out hydrodesulfurization reaction and olefin aromatization reaction. Process conditions and product properties are shown in Table 2. It can be seen from Table 2 that the sulfur content of the gasoline fraction is 45 μg / g, the olefin content is 19.0 v%, and the antiknock index (RON+MON) / 2 has decreased by 0.5 units.

Embodiment 2

[0035] Using FCC gasoline B as raw material, the mixture of gasoline fraction, hydrogen and hydrogenation adsorption catalyst and olefin aromatization catalyst are contacted to carry out hydrodesulfurization reaction and olefin aromatization reaction. Process conditions and product properties are shown in Table 2. It can be seen from Table 2 that the gasoline fraction has a sulfur content of 18 μg / g, an olefin content of 19.1 v%, and an antiknock index (RON+MON) / 2 decreased by 0.4 units.

Embodiment 3

[0037] Using FCC gasoline C as raw material, the mixture of gasoline fraction, hydrogen and hydrogenation adsorption catalyst and olefin aromatization catalyst are contacted to carry out hydrodesulfurization reaction and olefin aromatization reaction. Process conditions and product properties are shown in Table 3. As can be seen from Table 2, the sulfur content of the gasoline fraction is 3 μg / g, the olefin content is 19.2v%, and the antiknock index (RON+MON) / 2 has decreased by 0.3 units.

[0038] Table 1 Main properties of gasoline raw materials used in the examples

[0039] raw material A

raw material B

raw material C

Density (20℃), g / cm 3

0.7133

0.7155

0.7240

Sulfur content, μg / g

900

900

680

Olefin content, v%

37

40

41

Aromatic content, v%

16

15

16

Distillation range, ℃

initial boiling point

42

41

38

10％

...

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Abstract

The invention discloses a gasoline deep desulphurization and olefin reduction method, comprising that the gasoline raw material and hydrogen are contacted with hydrogenation absorption desulphurization catalyst and olefin aromatization difunctional catalyst to remove sulfur in the gasoline and reduce the olefin content in the product. The method of the invention can produce gasoline product with the sulfur content lower than 50 micrograms per gram, and can further produce gasoline product with the sulfur content lower than 10 micrograms per gram while the olefin content is lower than 20v%, and meanwhile the antiknock quality index loss is low. The method of the invention can be applied to deep desulphurization and olefin reduction process of FCC gasoline, catalytic pyrolysis gasoline, coker gasoline, pyrolysis gasoline and pressure gasoline or the mixed gasoline raw material thereof.

Description

technical field [0001] The invention belongs to a method for deeply desulfurizing and reducing olefins in gasoline, in particular to a method for producing high-quality gasoline by refining hydrocarbon oil under hydrogen-facing conditions. technical background [0002] With the continuous enhancement of people's awareness of environmental protection, the emission of toxic and harmful substances in automobile exhaust will be strictly controlled, so the quality requirements of oil products used as engine fuels are becoming more and more stringent. For this reason, various countries have put forward extremely stringent restriction indicators on motor gasoline specifications such as oxygen content, vapor pressure, benzene content, total aromatics content, boiling point, olefin content and sulfur content, in order to reduce the emission of harmful substances. The main problem in comparing the quality of gasoline in my country is the high content of sulfur and olefins. The main re...

Claims

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Application Information

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IPC IPC(8): C10G45/04
Inventor 李宝忠张英张忠清关明华
Owner CHINA PETROLEUM & CHEM CORP
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