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Desulfurization method for catalytically oxidizing fuel oil

A catalytic oxidation desulfurization and fuel oil technology, which is applied in the refining of oxygenated compounds, the petroleum industry, and the treatment of hydrocarbon oil. It can solve the problems of complex conditions and unsatisfactory desulfurization effect, and achieve low cost, good desulfurization effect, and oxidation system. The effect of low requirements

Inactive Publication Date: 2020-04-21
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the desulfurization of ionic liquids in the prior art may be complicated or the desulfurization effect is not ideal. Therefore, it is of great significance to study a desulfurization method that is easy to operate and has a good desulfurization effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Synthesis of ionic liquids

[0028] (1) Mix caprolactam with concentrated hydrochloric acid, the molar ratio of caprolactam and HCl is 1:3, and react at a constant temperature of 80°C for 4 hours to obtain an ionic liquid intermediate;

[0029] (2) Add zinc chloride to the ionic liquid intermediate according to the molar ratio of 1:1, and react at a constant temperature of 80°C for 2 hours to obtain the ionic liquid [HCLP][ZnCl 3 ].

[0030] 2. Ionic liquid desulfurization

[0031] Dissolve dibenzothiophene in n-octane to prepare model diesel oil as a simulated oil with a sulfur content of 1000ppm. Take 10ml of the above simulated oil and 3g of [HCLP][ZnCl 3 ] Mixing, after the temperature reaches the set value of 30°C, add a mixed solution of 2ml hydrogen peroxide and 4ml acetic acid, react for 60 minutes and let it stand for stratification, cool to room temperature, the sulfur content is reduced to 5ppm, and the desulfurization rate is 99.5%.

[0032] 10ml of ca...

Embodiment 2

[0034] 1. Synthesis of ionic liquids

[0035] (1) Mix caprolactam with concentrated hydrochloric acid, the molar ratio of caprolactam and HCl is 1:2, and react at a constant temperature of 85°C for 3 hours to obtain an ionic liquid intermediate;

[0036] (2) Add zinc chloride to the ionic liquid intermediate according to the molar ratio of 1:1, and react at a constant temperature of 85°C for 3h to obtain the ionic liquid [HCLP][ZnCl 3 ].

[0037] 2. Ionic liquid desulfurization

[0038] [HCLP][ZnCl][HCLP][ZnCl prepared by 10ml sulfur content is the simulated oil of embodiment 1 of 1000ppm and 1g present embodiment 3 ] mixed, after the temperature reaches the set value of 30°C, add 2ml H 2 o 2 And the mixed solution of 4ml acetic acid, after reacting for 50 minutes, let it stand for stratification, cool to room temperature, the sulfur content is reduced to 160.99ppm, and the desulfurization rate is 83.90%.

[0039] 10ml of catalytic cracked diesel oil with a sulfur content...

Embodiment 3

[0041] [HCLP][ZnCl][HCLP][ZnCl prepared by 10ml of the simulated oil of Example 1 and 3g of Example 1 with a sulfur content of 1000ppm 3 ] mixed, after the temperature reaches the set value of 25°C, add 2ml H 2 o 2 And the mixed solution of 4ml acetic acid, after reacting for 60 minutes, let it stand for stratification, cool to room temperature, the sulfur content is reduced to 100.69ppm, and the desulfurization rate is 89.93%.

[0042] [HCLP][ZnCl][HCLP][ZnCl prepared by 10ml sulfur content of 1300ppm catalytic cracked diesel oil and 3g embodiment 1 3 ] mixed, after the temperature reaches the set value of 25°C, add 2ml H 2 o 2 With the mixed solution of 4ml acetic acid, after reacting for 60 minutes, let it stand for stratification, cool to room temperature, the sulfur content is reduced to 200ppm, the desulfurization rate is 84.6%, and low-sulfur content diesel oil>9.5ml is obtained.

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PUM

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Abstract

The invention relates to the technical field of oil product refining in the petrochemical industry, and particularly discloses a desulfurization method for catalytically oxidizing fuel oil by utilizing an ionic liquid. The desulfurization method comprises the following steps: mixing the ionic liquid and the fuel oil, adding an oxidant for a desulfurization reaction, and separating the fuel oil from the ionic liquid after the reaction is finished so as to obtain a clean oil product, wherein the ionic liquid is prepared by acidifying caprolactam with hydrochloric acid and then reacting the acidified caprolactam with zinc chloride. In the method provided by the invention, the ionic liquid is easily-available in raw materials, low in price, easy to prepare, friendly to the environment and lowin corrosivity; sulfur in the fuel oil is deeply oxidized and removed in the presence of theoxidant; and the clean oil product with low sulfur content is obtained.

Description

technical field [0001] The invention relates to the technical field of oil product refining in the petrochemical industry, in particular to a fuel oil catalytic oxidation desulfurization method. Background technique [0002] In recent years, with the intensification of energy conservation and emission reduction, various countries have higher and higher requirements on petroleum sulfur content standards. my country promulgated the GB17930-2016 "Vehicle Diesel Diesel" standard in 2019, which stipulates that the sulfur content of vehicle petroleum should not exceed 10mg / kg. Compared with developed countries, there is still a certain gap between my country's oil deep desulfurization technology and environmental protection requirements. At present, the most widely used desulfurization method in the petroleum refining industry is catalytic hydrogenation, but the deep desulfurization effect of hydrodesulfurization on gasoline and diesel products is not ideal, and it is difficult t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/04
CPCC10G27/04C10G2300/202C10G2400/04
Inventor 刘冉杨重阳
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY