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A kind of ionic liquid is used for fcc gasoline oxidation desulfurization method

An ionic liquid and oxidative desulfurization technology, which is applied in the direction of refining oxygen-containing compounds, can solve the problems of high acidity of inorganic acids, harsh equipment and process requirements, and non-compliance with green chemical industry, and achieve the effect of mild conditions and simple process

Inactive Publication Date: 2014-10-15
PETROCHINA CO LTD
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Problems solved by technology

[0003] At present, there are some patents and papers on ionic liquids used to catalyze the desulfurization of oil products, but most of the ionic liquids used use hydrogen sulfate as anion, or sulfonic acid functional groups as cations, which undoubtedly have a great effect on the removal of original sulfide in oil. At the same time, another type of sulfur-containing compound is introduced, and the inorganic acid is relatively acidic, and the requirements for equipment and process are relatively strict, which does not meet the requirements of green chemical industry

Method used

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  • A kind of ionic liquid is used for fcc gasoline oxidation desulfurization method

Examples

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Effect test

Embodiment 1

[0014] Example 1 : 1-Ethyl-3-methyl-imidazole trifluoroacetate ionic liquid for simulating FCC gasoline desulfurization method

[0015] In the reaction kettle, 1-ethyl-3-methyl-imidazole trifluoroacetate ionic liquid is used as catalyst, the amount added is 1 / 25 (volume ratio) of simulated FCC gasoline, and hydrogen peroxide of equal volume to the ionic liquid is added As an oxidizing agent, the reaction temperature is controlled at 80°C, and the reaction time is 1 hour. After the reacted system is separated, the oil phase is taken, which is desulfurized gasoline.

[0016] The sulfur content in the oil phase was measured by gas chromatography, and the desulfurization rate was over 95%, and the sulfur content was reduced to below 10ppm, meeting the Euro V emission standard.

Embodiment 2

[0017] Example 2: 1-butyl-3-methyl-imidazole trifluoroacetate ionic liquid is used to simulate FCC gasoline desulfurization method

[0018] In the reaction kettle, use 1-butyl-3-methyl-imidazole trifluoroacetate ionic liquid as catalyst, add 1 / 50 (volume ratio) of simulated FCC gasoline, add 0.5 times the volume of ionic liquid hydrogen peroxide As an oxidizing agent, the reaction temperature is controlled at 60°C, and the reaction time is 0.5 hours. After the reaction system is separated, the oil phase is taken, which is desulfurized gasoline.

[0019] The sulfur content in the oil phase was measured by gas chromatography, and the desulfurization rate reached over 97%, and the simulated FCC gasoline sulfur content was reduced from the initial concentration of 1000ppm to below 10ppm, meeting the Euro V emission standard.

Embodiment 3

[0020] Example 3 1-hexyl-3-methyl-imidazole trifluoroacetate ionic liquid used in FCC gasoline desulfurization method

[0021] In the reaction kettle, 1-hexyl-3-methyl-imidazole trifluoroacetate ionic liquid is used as catalyst, the amount added is 1 / 35 (volume ratio) of FCC gasoline (commercially available product), and 2 times of ionic liquid is added The volume of hydrogen peroxide is used as oxidant, the reaction temperature is controlled at 70°C, and the reaction time is 1.5 hours. After the reaction system is separated, the oil phase is taken, which is desulfurized gasoline.

[0022] The sulfur content in the oil phase was measured with a TS-2000 ultraviolet fluorescent sulfur analyzer, and the desulfurization rate reached over 96%, and the sulfur content was reduced to below 10ppm, meeting the Euro V emission standard.

[0023] The performance indicators of FCC gasoline after desulfurization, such as octane number, distillation range, saturated vapor pressure, chromat...

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Abstract

The invention relates to an ionic liquid used in an FCC gasoline oxidation desulfurization method. The adopted technical scheme is: in the FCC gasoline system, use imidazolium trifluoroacetic acid salt ionic liquid as catalyst, hydrogen peroxide as oxidant, control the reaction temperature at 60-80°C, and the reaction time is 0.5-2 hours. Through the invention, the desulfurization rate of FCC gasoline reaches more than 95%, the sulfur content is reduced to below 10ppm, and the emission standard of Euro V is reached. Compared with other desulfurization technologies, the present invention is carried out at normal temperature and pressure, under mild conditions, and can remove sulfur compounds in the fuel oil without changing the components.

Description

technical field [0001] The invention belongs to the fields of chemical catalysis and desulfurization of gasoline and diesel oil, and in particular relates to a method for catalytic oxidation desulfurization of FCC gasoline by using ionic liquid. Background technique [0002] As the world's environmental regulations become increasingly stringent, the oil refining industry is facing enormous challenges in terms of production and environmental protection. With the increase in car ownership, the amount of tail gas emitted has also increased significantly. Due to the existence of sulfur in oil products, there are many hazards to the petroleum processing process and its product application, such as corrosion of metal equipment, catalyst poisoning, and environmental pollution during use. Sulfur also oxidizes the unstable components in the oil, and polymerizes to form colloidal substances, which directly affects the stability of the oil, and also affects the susceptibility of the o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G27/12
Inventor 臧树良郭志军王昌东房大维王强
Owner PETROCHINA CO LTD
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