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Method for catalytic oxidation of fuel oil desulfurization with three-component deep eutectic solvent

A technology of deep eutectic solvent and catalytic oxidation, which is applied in the fields of refining oxygen-containing compounds, petroleum industry, and treating hydrocarbon oil, etc. It can solve the problems of volatility and corrosion, achieve high catalytic oxidation desulfurization performance and reactant utilization 100% efficiency and simple preparation

Active Publication Date: 2019-09-03
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the current research on the use of deep eutectic solvents for extraction and catalytic oxidative desulfurization, researchers such as Li and Lü prepared different types of acidic deep eutectic solvents for extraction and catalytic oxidative desulfurization, and some deep eutectic solvents showed excellent desulfurization activity. , which also proves the prospect of deep eutectic solvents for catalytic oxidative desulfurization; however, the deep eutectic solvents reported in the current research are all two components, and use organic acids or strong acids, which are volatile and corrosive

Method used

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  • Method for catalytic oxidation of fuel oil desulfurization with three-component deep eutectic solvent
  • Method for catalytic oxidation of fuel oil desulfurization with three-component deep eutectic solvent

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Experimental program
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Effect test

Embodiment 1

[0024] (1) Prepare deep eutectic solvent No. 1 (DES1) by tetramethylammonium chloride, boric acid, ethylene glycol with a molar ratio of 1:0.1:1;

[0025] (2) Dibenzothiophene (DBT) is dissolved in dodecane, and is made into the fuel oil that sulfur content is 500ppm; Add the DES1 of 0.1g in the fuel oil of 5g sulfur content 500ppm, add 10wt%H again 2 o 2 , H 2 o 2 The ratio to the amount of sulfide (DBT) in fuel oil is 2:1. At this time, the deep eutectic solvent phase is in the lower layer, and the oil phase is in the upper layer. H 2 o 2 Dissolved in a deep eutectic solvent; after magnetic stirring at 0°C for 30 minutes, the fuel oil was separated, and the content of DBT in the oil was detected by GC-FID, and the sulfur removal rate was calculated to be 31.3%;

[0026] (3) Recovery of the deep eutectic solvent: After the fuel oil is separated, add 1 times the volume of water to the remaining liquid containing the deep eutectic solvent and mix it. Since the deep eutectic...

Embodiment 2

[0028] (1) Prepare deep eutectic solvent No. 2 (DES2) by trioctylmethyl ammonium chloride, boric acid, polyethylene glycol 200 with a molar ratio of 1:1:0.1;

[0029] (2) Dissolve 4-methyldibenzothiophene (4-MDBT) in dodecane to make fuel oil with a sulfur content of 500ppm; add 1g to 5g of fuel oil (4-MDBT) with a sulfur content of 500ppm DES2, 20wt%H 2 o 2 , H 2 o 2 The ratio to the amount of sulfide (4-MDBT) in fuel oil is 4:1. At this time, the deep eutectic solvent phase is in the lower layer, and the oil phase is in the upper layer. H 2 o 2 Dissolved in a deep eutectic solvent; after magnetic stirring at 20°C for 60 minutes, the fuel oil was separated, and the content of 4-MDBT in the oil was detected by GC-FID, and the sulfur removal rate was calculated to be 52.5%;

[0030] (3) Recovery of the deep eutectic solvent: After the fuel oil is separated, add 2 times the volume of water to the remaining liquid containing the deep eutectic solvent to mix, because the deep...

Embodiment 3

[0032] (1) Prepare deep eutectic solvent No. 3 (DES3) by dodecyltrimethylammonium bromide, boric acid, glycerol with a molar ratio of 1:2:2;

[0033] (2) dibenzothiophene (DBT) is dissolved in dodecane, is made into the fuel oil that sulfur content is 500ppm; In the fuel oil (DBT) of 5g sulfur content 500ppm, add 5g DES3, 30wt%H 2 o 2 (H 2 o 2 The ratio of the amount of sulfide to fuel oil is 6:1), at this time, the deep eutectic solvent phase is in the lower layer, and the oil phase is in the upper layer, and H 2 o 2 Dissolved in a deep eutectic solvent; after magnetic stirring at 50°C for 8 hours, the fuel oil was separated, and the content of DBT in the oil was detected by GC-FID, and the sulfur removal rate was calculated to be 99.5%;

[0034] (3) Recovery of the deep eutectic solvent: After the fuel oil is separated, add 3 times the volume of water to the remaining liquid containing the deep eutectic solvent to mix, because the deep eutectic solvent is soluble in wate...

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Abstract

Belonging to the field of oil oxidation desulfurization, the invention in particular relates to a method for catalytic oxidation of fuel oil desulfurization with a three-component deep eutectic solvent. The method includes: taking a quaternary ammonium salt or quaternary phosphonium salt as the hydrogen bond acceptor, and using boric acid and organic alcohol as the hydrogen bond donor to prepare the deep eutectic solvent; and adopting the deep eutectic solvent as the catalyst and extractant, and employing hydrogen peroxide as the oxidant for oxidation removal of dibenzothiophene sulfide from the oil product. The deep eutectic solvent adopted by the invention uses cheap and easily raw materials for synthesis, and can be obtained by one-step stirring, the prepared deep eutectic solvent is greener and more environmentally friendly, has a sulfur removal rate up to 99.5% and good desulfurization effect, and the deep eutectic solvent can be recycled.

Description

technical field [0001] The invention belongs to the field of oxidative desulfurization of oil products, and in particular relates to a method for desulfurizing fuel oil by catalytic oxidation of a three-component deep eutectic solvent. Background technique [0002] In recent decades, air pollution has become an increasingly serious global problem, and a large amount of sulfur oxides produced during fuel combustion is one of the main sources. The main cause of acid rain is SO x It reacts with water and other substances in the air, which has a great negative impact on the environment and economy. Also SO x It will destroy the automobile exhaust catalytic conversion device and further aggravate environmental pollution. Therefore, desulfurization of fuel oil is urgent. The current industrial use of hydrodesulfurization process can effectively remove most of the sulfur compounds in the fuel. However, harsh reaction conditions, such as higher reaction temperature (>300 °C)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/12
CPCC10G27/12C10G2300/202
Inventor 蒋伟贾浩李宏平肖进罗亚平朱文帅李华明
Owner JIANGSU UNIV
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