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Method for extracting nitrogen from fuel oil by using polyethylene glycol and its modified compounds

A polyethylene glycol and compound technology, applied in the petrochemical field, can solve the problems of corrosion of steel bar equipment, easy water absorption, serious problems, etc., and achieve the effects of low denitrification cost, simple operation and uncomplicated equipment.

Active Publication Date: 2020-07-28
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

Although the choline chloride-organic acid deep eutectic solvent can efficiently remove organic nitrogen compounds in fuel oil and has certain activity on basic nitrogen compounds, it contains Cl - And easy to absorb water, the corrosion of steel equipment is more serious

Method used

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Effect test

Embodiment 1

[0017] The extraction agent is polyethylene glycol, the number average molecular weight is 600, the mass ratio of extraction agent to fuel oil is 0.1, the extraction temperature is 20°C, and the extraction time is 15 minutes. The content of the fuel is 25wt%, the initial nitrogen content of the fuel is 500μg / g, after the extraction operation, the denitrification rate is 93.2%, and the Nernst partition coefficient is 107.3.

Embodiment 2

[0019] The extraction agent is polyethylene glycol dicarboxylic acid, the number average molecular weight is 600, the mass ratio of extraction agent to fuel oil is 0.1, the extraction temperature is 20°C, the extraction time is 15 minutes, and the fuel used is a simulated oil formed by mixing indole, toluene, and n-octane , wherein the content of toluene is 25wt%, the initial nitrogen content of fuel oil is 500μg / g, after the extraction operation, the denitrification rate is 91.1%, and the Nernst partition coefficient is 83.9.

Embodiment 3

[0021] Extractant polyethylene glycol, number average molecular weight 200, mass ratio of extractant to fuel oil 0.5, extraction temperature 30°C, extraction time 15min, fuel oil used is simulated oil formed by mixing indole, toluene and n-octane, of which toluene The content of the fuel is 25wt%, the initial nitrogen content of the fuel is 500μg / g, after the extraction operation, the denitrification rate is 97.4%, and the Nernst partition coefficient is 67.0.

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Abstract

The invention relates to a method for extracting and removing nitrogen from fuel oil by use of polyethylene glycol and modified compounds thereof. According to the method, polyethylene glycol, polyethylene glycol dicarboxylate, polyethylene glycol monomethyl ether and polyethylene glycol dimethyl ether are adopted as extraction agents; the active hydroxyl / carboxyl or O atoms included in the extraction agents are subjected to hydrogen-bond interaction with N atoms or N-H groups of organic nitride so as to efficiently remove the organic nitride from the fuel oil. The adopted extraction agents only contain such elements as C, H and O; new pollutants (organic sulfur, nitrogen and the like) are not introduced in the nitrogen removal process, meeting the requirements of green industry; moreover,the extraction agents are insoluble in the fuel oil, the physical property is stable that the extraction agents can be recycled; the nitrogen removal conditions are mild, high-temperature and high-pressure environment is not needed, the operation is easy, the required equipment is not complicated, and the cost is relatively low.

Description

technical field [0001] The invention relates to the field of petrochemical technology, in particular to a method for extracting and denitrifying fuel oil by using polyethylene glycol and modified compounds thereof. Background technique [0002] Fuel denitrification is a hot spot in the field of petrochemical industry. For fuel oil, it contains a variety of organic nitrogen compounds, mainly divided into neutral nitrogen compounds and basic nitrogen compounds. Neutral nitrogen compounds include pyrrole, indole and carbazole, etc., while basic nitrogen compounds include pyridine, quinone, etc. phylloline and acridine etc. The presence of these organic nitrogen compounds will cause NO to pollute the air when fuel is used x , and the organic nitrogen compounds in the fuel will interfere with the removal of thiophene sulfide, resulting in a decline in the desulfurization performance of the fuel. Therefore, fuel denitrification is very important. [0003] Similar to fuel oil d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G21/16
CPCC10G21/16C10G2300/201
Inventor 高家俊朱爽张佳锦熊春艳姜兴茂
Owner WUHAN INSTITUTE OF TECHNOLOGY
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