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A kind of deep eutectic solvent for extraction and denitrification of fuel oil and its application method

A low eutectic solvent, fuel oil technology, applied in chemical instruments and methods, processing hydrocarbon oil, petroleum industry, etc., can solve the problems of easily polluted oil, insufficient acidity of extractant Bronsted, and poor removal effect of non-basic nitrogen, etc. , to achieve the effect of simple separation, high oil yield and good industrial application potential

Active Publication Date: 2021-03-30
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been people who have developed different types of deep eutectic solvents and used them in the fuel oil extraction desulfurization or denitrification process. The deep eutectic solvent composed of sugars, urea compounds, etc., and use it to carry out single-stage or multi-stage extraction and denitrification of nitrogen-containing oils. Poor removal of nitrides
People such as Yang Qiwei (CN104774643A) also disclose a kind of method that utilizes the deep eutectic solvent extraction that forms of acidic compound (organic acid) and polyhydroxy compound (saccharide compound) to remove basic nitride in oil product, this method adopts The small molecule organic acid has a certain solubility in oil, which is easy to contaminate oil; in addition, the Lewis alkalinity of the deep eutectic solvent is not enough, and the removal effect of non-basic nitrogen is not good
No similar technology has been publicly reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Extractant composition: polyethylene glycol dicarboxylic acid (dcPEG-250) with a molecular weight of 250, tetraethylammonium chloride (TEACl), wherein the molar ratio of TEACl to dcPEG-250 is 1:1. The model fuel is mixed with indole (500μg / g), toluene (25wt%) and n-octane.

[0019] Extraction and denitrification operating conditions: the mass ratio of extractant to oil is 1:1, the extraction temperature is 30°C, and the extraction stirring time is 15 minutes. After detecting and calculating the denitrified oil phase obtained by extraction, it can be known that the denitrification rate is 98.5%, and the distribution coefficient D N was 63, and the oil yield was 96.9%.

Embodiment 2

[0021] Extractant composition: dcPEG-250, TEACl, wherein the molar ratio of TEACl to dcPEG-250 is 0.5:1. The model fuel is mixed with indole (500μg / g), toluene (25wt%) and n-octane.

[0022] Extraction and denitrification operating conditions: the mass ratio of extractant to oil is 1:1, the extraction temperature is 21°C, and the extraction stirring time is 15 minutes. After detecting and calculating the denitrified oil phase obtained by extraction, it can be known that the denitrification rate is 98.8%, and the distribution coefficient D N was 82, and the oil yield was 97.1%.

Embodiment 3

[0024] Extractant composition: dcPEG-250, TEACl, wherein the molar ratio of TEACl to dcPEG-250 is 0.5:1. The model fuel oil was mixed with quinoline (500μg / g), toluene (25wt%) and n-octane.

[0025] Extraction and denitrification operating conditions: the mass ratio of extractant to oil is 1:1, the extraction temperature is 30°C, and the extraction stirring time is 15 minutes. After detecting and calculating the denitrified oil phase obtained by extraction, it can be known that the denitrification rate is 99.1%, and the distribution coefficient D N was 108, and the oil yield was 97.0%.

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Abstract

The invention relates to a eutectic solvent for fuel extraction and denitrification and a use method thereof. The eutectic solvent is prepared by mixing poly(ethylene glycol)bis(carboxymethyl) ether having a molecular weight of 250 and quaternary ammonium salt, the eutectic solvent and fuel are directly mixed after extraction and denitrification and subjected to standing, and liquid separation iscarried out to obtain a denitrified oil product and a nitrogen-rich extract. When the eutectic solvent is used for extracting and denitrifying the fuel, the nitrogen removal rate can reach 50% to 99.9%, the nitrogen distribution coefficient is 8.0 to 110, the aromatics selectivity is 300 and more, and the oil yield is greater than 95 %.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a fuel oil denitrification technology, in particular to a deep eutectic solvent for extraction and denitrification of fuel oil and a use method thereof. Background technique [0002] Fuel can provide a source of energy. my country's fuel oil standards have clear regulations on sulfur and mercaptan content, but there is no clear and strict requirement on nitrogen content. However, fuel oil contains many organic nitrogen pollutants. After fuel oil is burned, the organic nitrogen is converted into nitrogen oxides, which leads to acid rain or smog. In addition, the presence of organic nitrogen in fuel oil can interfere with desulfurization. Therefore, fuel denitrification is very important. [0003] Organic nitrogen in fuel oil can be divided into two categories, one is basic nitrogen, mainly including quinoline, pyridine, acridine, etc.; the other is non-basic nitr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C213/10C10G21/27
CPCC10G21/27C10G2300/202
Inventor 高家俊徐娇铼余雅黔朱爽熊春艳姜兴茂
Owner WUHAN INSTITUTE OF TECHNOLOGY
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