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Split-phase desulfurization method and device based on ozone oxidation

An ozone oxidation and oxidative desulfurization technology, applied in the petroleum industry, multi-stage series refining process treatment, hydrocarbon oil treatment, etc., can solve problems such as excessive oxidation of fuel oil

Pending Publication Date: 2021-08-10
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of excessive fuel oil oxidation caused by the existing oil products in the ozone desulfurization process, the present invention provides a phase-separated desulfurization method based on ozone oxidation

Method used

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  • Split-phase desulfurization method and device based on ozone oxidation
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  • Split-phase desulfurization method and device based on ozone oxidation

Examples

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Embodiment 1

[0048] An embodiment of the present invention provides a phase separation desulfurization device based on ozone oxidation, including: a reactor 1, an agitator 3, a first lifting platform 4, a collector 5, a second lifting platform 9, an ozone generator 6, and an ozone absorber 8. Rotameter 7, first valve 2 and second valve 10.

[0049] The reactor 1 is provided with an air inlet 12, an air outlet 14, a liquid inlet 11 and a liquid outlet 13, which are used to extract and separate the oil product to be desulfurized into an oil phase and an extraction phase, and perform oxidative desulfurization on the extraction phase; The reactor 1 is provided with a stirrer 3 for stirring the solution in the reactor 1 evenly; the first lifting platform 4 is arranged below the above-mentioned reactor 1 for adjusting the height of the reactor 1; the collector 5 A collection port 15 is provided, and the above-mentioned collection port 15 communicates with the liquid outlet 13 of the above-mentio...

Embodiment 2

[0061] An embodiment of the present invention provides a phase-separated desulfurization method based on ozone oxidation, that is, the phase-separated desulfurization device based on ozone oxidation in Example 1 is used, and the method includes the following steps:

[0062] Extraction: at 20°C, mix 20mL of oil to be desulfurized (octane simulated oil with a sulfur content of 500ppm) and 40mL of deep eutectic solvent (dissolve 0.08mol tetrabutylammonium bromide in 0.12mol acetic acid , and stirred in a water bath at 90°C for 2h to obtain a light yellow transparent liquid, which was cooled to room temperature at 20°C to obtain the deep eutectic solvent) was added to Reactor 1 for mixing, and magnetically stirred at a speed of 2500rpm After 4 minutes, turn off the magnetic stirring and let it stand until the solution is separated into phases to obtain the first oil phase and the first extraction phase. Then, by adjusting the lifting of the first lifting platform 4 and the second l...

Embodiment 3

[0067] An embodiment of the present invention provides a phase-separated desulfurization method based on ozone oxidation, that is, the phase-separated desulfurization device based on ozone oxidation in Example 1 is used, and the method includes the following steps:

[0068] Extraction: at 23°C, mix 20mL of oil to be desulfurized (octane simulated oil with a sulfur content of 500ppm) and 10mL of deep eutectic solvent (dissolve 0.12mol tetrabutylammonium bromide in 0.08mol acetic acid , and stirred in a water bath at 80°C for 2h to obtain a light yellow transparent liquid, which was cooled to room temperature at 23°C to obtain the deep eutectic solvent) was added to Reactor 1 for mixing, and magnetically stirred for 7min at a speed of 1800rpm Finally, turn off the magnetic stirring and let it stand until the solution is separated into phases to obtain the first oil phase and the first extraction phase, and then adjust the lifting of the first lifting platform 4 and the second lif...

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Abstract

The invention relates to the technical field of petroleum product desulfurization, and particularly discloses a split-phase desulfurization method and device based on ozone oxidation. The method comprises the following steps: extracting: mixing a to-be-desulfurized oil product with an extraction agent, uniformly stirring to obtain a first oil phase and a first extraction phase, and collecting the first oil phase; performing oxidation desulfurization: introducing ozone into the first extraction phase for first oxidation desulfurization, and introducing air after oxidation is finished to remove ozone dissolved in the first extraction phase, so as to obtain a primary desulfurization product; and circulating: uniformly mixing the primary desulfurization product with the first oil phase, repeating the steps of extraction and oxidative desulfurization, and finally collecting the obtained oil phase, namely a desulfurized oil product. The sulfur-containing compound in the oil phase are extracted into the extraction phase through extraction, and then the extraction phase is subjected to ozone oxidation desulfurization after phase splitting, so that the sulfur content in the oil product is lower than 10 ppm, and the desulfurization rate reaches 98.68%.

Description

technical field [0001] The invention relates to the technical field of desulfurization of petroleum products, in particular to an ozone oxidation-based phase-separation desulfurization method and a device thereof. Background technique [0002] The combustion of sulfide in fuel will produce gaseous sulfur oxides (SOx), which will lead to the formation of acid rain, smog and various respiratory diseases in humans. Therefore, it is of great practical significance to achieve deep desulfurization of oil products with high-efficiency desulfurization technology. [0003] Traditional hydrodesulfurization technology performs catalytic hydrogenation reaction under high temperature and high pressure conditions, and absorbs and removes sulfur atoms of organic sulfides in oil products in the form of hydrogen sulfide, thereby realizing fuel desulfurization. This technology can effectively remove aliphatic sulfides such as mercaptans, sulfides, and disulfides in oil products, but affected ...

Claims

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Application Information

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IPC IPC(8): C10G53/14
CPCC10G53/14C10G2300/202
Inventor 曾祥峰豆帅勇赵云波魏邵华刘家帅王子博涂瑞嘉安家毓段二红
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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