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Method for extracting and removing nitrogen from fuel oil by using succinimide compound-triethylene glycol mixed solvent

A technology of succinimide and bromosuccinimide, which is applied in the fields of petrochemical and environmental protection, can solve the problems of denitrification effect to be improved, acidity is not strong enough, etc., and achieve a good industrial application prospect, moderate cost and mild conditions Effect

Pending Publication Date: 2022-01-11
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in-depth analysis shows that the acidity of polyethylene glycol solvents is not strong enough, and the removal degree of basic nitrogen is not as ideal as that of neutral nitrogen, and the comprehensive denitrification effect still needs to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Extractant: a mixture of chlorosuccinimide and triethylene glycol, wherein the mass fraction of chlorosuccinimide is 0.95%.

[0020] Fuel: simulated gasoline formed by mixing pyridine and n-octane, with an initial nitrogen content of 500 μg / g.

[0021] Process conditions: extraction temperature is 30°C, extraction time is 30 minutes, and the mass ratio of extraction agent to fuel oil is 1. Stir continuously during the extraction process so that the two are fully mixed evenly. After the extraction, stand still for stratification and liquid-liquid separation to obtain a denitrified oil phase and a nitrogen-enriched extraction phase.

[0022] After the above extraction operation, the nitrogen content in the fuel is 0.43 μg / g, the calculated denitrification rate is 99.91%, and the mass distribution coefficient is 1124.

Embodiment 2

[0024] Extractant: a mixture of chlorosuccinimide and triethylene glycol, wherein the mass fraction of chlorosuccinimide is 0.95%.

[0025] Fuel: simulated gasoline formed by mixing acridine and n-octane, with an initial nitrogen content of 500 μg / g.

[0026] Process conditions: extraction temperature is 30°C, extraction time is 30 minutes, and the mass ratio of extraction agent to fuel oil is 1. Stir continuously during the extraction process so that the two are fully mixed evenly. After the extraction, the liquid and liquid are separated after standing and stratifying to obtain a denitrified oil phase and a nitrogen-enriched extraction phase.

[0027] After the above extraction operation, the nitrogen content in the fuel is 0.06 μg / g, the calculated denitrification rate is 99.99%, and the mass distribution coefficient is 7852.

Embodiment 3

[0029] Extractant: a mixture of chlorosuccinimide and triethylene glycol, wherein the mass fraction of chlorosuccinimide is 0.48%.

[0030] Fuel: simulated gasoline formed by mixing indole and n-octane, with an initial nitrogen content of 500 μg / g.

[0031] Process conditions: extraction temperature is 30°C, extraction time is 30 minutes, and the mass ratio of extraction agent to fuel oil is 1. Stir continuously during the extraction process so that the two are fully mixed evenly. After the extraction, the liquid and liquid are separated after standing and stratifying to obtain a denitrified oil phase and a nitrogen-enriched extraction phase.

[0032] After the above extraction operation, the nitrogen content in the fuel is 2.94 μg / g, the calculated denitrification rate is 99.41%, and the mass distribution coefficient is 166.

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Abstract

The invention relates to a method for extracting and removing nitrogen from fuel oil by using a succinimide compound-triethylene glycol mixed solvent. The method comprises the following steps: mixing a succinimide compound-triethylene glycol mixed solution with the mass fraction of 0.2-3% as an extractant with fuel oil with the nitrogen content of not more than 500 [mu]g / g according to the mass ratio of 0.02-3, fully extracting at 20-60 DEG C, and finally standing and separating liquid to obtain denitrified fuel oil. The novel fuel oil denitrification extractant developed by the invention has the advantages of good denitrification effect, high selectivity, moderate cost and the like, the denitrification rate is as high as 99.9%, and basic nitrogen and neutral nitrogen in fuel oil can be basically removed thoroughly.

Description

technical field [0001] The invention relates to the technical fields of petrochemical industry and environmental protection, in particular to a method for extracting and denitrifying fuel oil by using a succinimide compound-triethylene glycol mixed solvent. Background technique [0002] Fuel denitrification has always been a research hotspot in the direction of oil cleaning. Organic nitrogen in fuel oil is divided into basic nitrogen (such as quinoline, acridine, pyridine, etc.) and non-basic nitrogen (such as indole, pyrrole, etc.), the existence of these organic nitrogen will not only reduce the quality of fuel, but also NO is produced during combustion x thereby polluting the air. Therefore, it is necessary to efficiently remove nitrogen compounds from fuel. [0003] In the face of increasingly stringent fuel emission standards and environmental protection requirements, in order to reduce the nitrogen content in fuel, the industrial denitrification technology has been ...

Claims

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Application Information

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IPC IPC(8): C10G21/12C10G21/20C10G21/16
CPCC10G21/12C10G21/20C10G21/16C10G2300/202
Inventor 高家俊石林子戴亚芬熊春艳
Owner WUHAN INSTITUTE OF TECHNOLOGY
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