Method for removing dibenzothiophene contained in fuel oil through catalytic oxidation

A technology of dibenzothiophene and catalytic oxidation, which is applied in the field of chemical engineering, can solve the problems of serious discharge pollution of waste lye, cannot be deeply oxidized, and has poor recyclability, and achieves good recyclability, low cost, and low cost. Effect

Inactive Publication Date: 2014-02-05
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Metal phthalocyanines have been used in industry to deodorize and oxidize mercaptans, but they can only oxidize mercaptans to disulfides, and cannot be deeply oxidized, and the recyclability is too poor, and the pollution of waste lye discharge is serious

Method used

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  • Method for removing dibenzothiophene contained in fuel oil through catalytic oxidation
  • Method for removing dibenzothiophene contained in fuel oil through catalytic oxidation
  • Method for removing dibenzothiophene contained in fuel oil through catalytic oxidation

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Weigh 5ml of n-octane model gasoline with a DBT concentration of 1000ppm, add 0.01g of binuclear metal phthalocyanine cobalt catalyst and 5ml of ionic liquid, in which the molar ratio of sulfur, catalyst and extractant is 1:0.0006:0.65, continuously in the reaction system Pass in oxidant air, control the air flow 0-100ml / min by the LZB-3WB glass rotor flowmeter, and react at 25℃ for 40min; after the reaction is over, stand still for stratification; pour out the upper oil phase for gas chromatography analysis, and The gas chromatography of the oil phase before the reaction showed that the desulfurization rate of DBT by binuclear metal phthalocyanine was 98.0%, and the catalyst was repeatedly used for 6 times, and the desulfurization rate was ≥94.0%.

Embodiment 2

[0032] Weigh 5ml of n-heptane model gasoline with a DBT concentration of 1000ppm, add 0.01g of binuclear metal phthalocyanine iron catalyst and 5ml of ionic liquid, in which the molar ratio of sulfur, catalyst and extractant is 1:0.0006:0.68, continuously in the reaction system Pass in oxidant air, control the air flow rate by LZB-3WB glass rotor flowmeter to 50ml / min, and react at 35℃ for 40min; after the reaction, let stand for stratification; pour out the upper oil phase for gas chromatography analysis, and The oil phase gas chromatographic comparison shows that the desulfurization rate of DBT by binuclear metal phthalocyanine is 97.5%, the catalyst is repeatedly used for 7 times, and the desulfurization rate is ≥93.7%.

Embodiment 3

[0034] Weigh 5ml of xylene model gasoline with a DBT concentration of 1000ppm, add 0.018g of binuclear metal phthalocyanine magnesium catalyst and 5ml of ionic liquid. The molar ratio of sulfur, catalyst and extractant is 1:0.0011:0.75. Into the oxidant air, the LZB-3WB glass rotor flowmeter controls the air flow to 50ml / min, and reacts at 40°C for 40min; after the reaction is over, stand still for stratification; pour out the upper oil phase for gas chromatography analysis, and the oil before the reaction Comparing with gas chromatography, the desulfurization rate of DBT by binuclear metal phthalocyanine is 97.33%. The catalyst is repeatedly used for 6 times, and the desulfurization rate is ≥93.2%.

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Abstract

The invention discloses a method for removing dibenzothiophene contained in fuel oil through catalytic oxidation, and belongs to the technical field of chemical engineering. According to the invention, the deep removal of the dibenzothiophene contained in the fuel oil is realized by taking binuclear metal phthalocyanine as a catalyst, ionic liquid as an extracting agent and air as an oxidizing agent and adopting a catalytic oxidation extraction coupling method at the mole ratio of sulfur to a catalyst to an extracting agent to an oxidizing agent of 1:(0.00015-0.0015):(0.45-0.85):(2.067-20.67). The method disclosed by the invention has the advantages of moderate reaction condition, small catalyst usage amount and high catalytic activity. According to the invention, the ionic liquid extracting agent is low in cost, and can realize the automatic layering with a reaction system after the reaction is finished, so that the binuclear metal phthalocyanine catalyst coupling ionic liquid has good recycling. The method disclosed by the invention is an environment-friendly production process and has good industrial application prospect.

Description

Technical field [0001] The invention relates to a fuel oil desulfurization technology, in particular to a method for catalytic oxidation extraction to remove dibenzothiophene (DBT) from fuel oil, and belongs to the technical field of chemical engineering. Background technique [0002] Currently, desulfurization methods mainly include two methods: hydrodesulfurization and non-hydrodesulfurization. Hydrodesulfurization is economically uneconomical due to harsh reaction conditions and high hydrogen consumption. Non-hydrodesulfurization includes oxidation, extraction, adsorption, biological desulfurization, etc. In recent years, since oxidative desulfurization can avoid the consumption of hydrogen and the reaction conditions are relatively mild, the process investment and operating costs are low, and it has gradually become a research focus. The most used oxidant in the oxidative desulfurization process is H 2 O 2 , But if H 2 O 2 , The cost is relatively high, and cheap and easily...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/14
Inventor 张娟胡颜荟任腾杰李俊盼赵地顺
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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