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Application of peroxydisulfate type ionic liquid compound in oil product desulfurization

A peroxodisulfate and ionic liquid technology, applied in the petroleum industry, hydrocarbon oil treatment, refined hydrocarbon oil, etc., can solve the problems of high energy consumption for repeated use of ionic liquids, high storage and transportation requirements, unstable oxidant properties, etc. , to avoid multi-step and high energy consumption, improve removal efficiency and shorten desulfurization time

Active Publication Date: 2019-01-25
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxidizing agent used is unstable in nature, there is a risk of explosion under certain conditions, and the storage and transportation requirements are relatively high.
Moreover, water will be introduced into the ionic liquid, and the separation process of the ionic liquid and water needs to be treated under reduced pressure at a higher temperature for a long time, which makes the repeated use of the ionic liquid a high energy consumption, which is an obstacle in the industrialization of this method

Method used

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  • Application of peroxydisulfate type ionic liquid compound in oil product desulfurization
  • Application of peroxydisulfate type ionic liquid compound in oil product desulfurization
  • Application of peroxydisulfate type ionic liquid compound in oil product desulfurization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) 0.1mol of 1-butyl-3-methylimidazolium chloride ([C 4 mim][Cl]) and 0.055mol of potassium peroxodisulfate (K 2 S 2 o 8 ) mixed with 150mL solvent acetone, stirred and reacted at 25°C for 24h, then filtered, and the obtained solution was vacuum decompressed to remove the solvent and then dried in a vacuum oven for 24h to obtain a light yellow liquid, namely 1-butyl-3- Methylimidazolium persulfate ([C 4 mim] 2 [S 2 o 8 ]);

[0060] (2) Under the protection of nitrogen, put 0.1mol 1-butyl-3-methylimidazolium chloride salt and 0.1mol cobalt chloride hexahydrate into a round bottom flask, and react at 100°C for 10h under stirring conditions, and the solid mixture The color changes from pink to dark blue viscous liquid to obtain 1-butyl-3-methylimidazolium cobalt chloride ionic liquid;

[0061] (3) 6g of fuel oil with an initial sulfur content of 500ppm and 1.5g of the 1-butyl-3-methylimidazolium cobalt chloride ionic liquid prepared in step (2) are mixed to obtain...

Embodiment 2

[0065] (1) Mix 0.2 mol of methyl tributylammonium chloride, 0.1 mol of potassium peroxodisulfate and 200 mL of methanol, stir and react at 25°C for 12 hours; Dry in a vacuum oven for 24 hours to obtain a white solid which is methyltributylammonium peroxodisulfate;

[0066] (2) Under the protection of nitrogen, put 0.1mol 1-ethyl-3-methylimidazolium chloride salt and 0.2mol zinc chloride into a round-bottomed flask, and react at 135°C for 5h under stirring conditions to obtain light yellow The viscous liquid is 1-ethyl-3-methylimidazolium chloride ionic liquid;

[0067] (3) 6g initial sulfur content is the fuel oil of 1000ppm and the 1-ethyl-3-methylimidazolium zinc chloride ionic liquid that 2g step (2) makes mixes, obtain mixed solution; Then add 0.5g step ( 1) The prepared methyl tributyl ammonium peroxodisulfate was reacted at 25° C. for 40 minutes under stirring conditions to complete the desulfurization of fuel oil;

[0068] (4) Statically stratify the desulfurization s...

Embodiment 3

[0071] (1) Mix 0.2mol of N-butylpyridinium chloride, 0.12mol of potassium peroxodisulfate and 250mL of acetonitrile, stir and react at 25°C for 24h; then filter, evaporate the solvent from the obtained solution with a rotary evaporator, and dissolve in methanol at Recrystallize at 258K, and dry the resulting white solid in a vacuum oven for 24 hours to obtain N-butylpyridine peroxodisulfate;

[0072] (2) Under the protection of nitrogen, put 0.1mol 1-butyl-3-methylimidazolium chloride salt and 0.1mol copper chloride into a round bottom flask, and react at 120°C for 7h under stirring conditions to obtain a viscous liquid That is, 1-butyl-3-methylimidazolium chloride ionic liquid;

[0073] (3) 6g initial sulfur content is the fuel oil of 250ppm and the 1-butyl-3-methylimidazolium copper chloride ionic liquid that 2g step (2) makes mixes, obtain mixed solution; Then add 1.0g step ( 1) The prepared N-butylpyridine peroxodisulfate was reacted at 60° C. for 5 minutes under stirring...

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Abstract

The invention belongs to the technical field of oil product desulfurization and particularly relates to an application of a peroxydisulfate type ionic liquid compound in oil product desulfurization. The peroxydisulfate type ionic liquid compound is at least one of 1,3-dialkyl imidazole persulfate, 1,2,3-trialkyl imidazole persulfate, 1,3-dicarboxy alkyl imidazole persulfate, 1-alkyl pyridine persulfate and alkyl quaternary ammonium persulfate. The peroxydisulfate type ionic liquid compound serves as an oxidizing agent, metal-bearing imidazole chlorine salt ionic liquid is used as a catalyst, an oxidation-extraction coupling desulfurization mode is utilized to perform oil product desulfurization under the more mild condition, the desulfurization time is greatly shortened, the removal efficiency is improved, the adopted oxidation-extraction coupling desulfurization system does not need to introduce water for an ion liquid phase, circular utilization is convenient, and an oxidizing agentcan also be generated through an electrochemical method.

Description

technical field [0001] The invention belongs to the technical field of oil product desulfurization, and in particular relates to the application of a peroxodisulfate-based ionic liquid compound in oil product desulfurization. Background technique [0002] In recent years, smog has swept across most parts of our country. Large and medium-sized cities are suffering from unprecedented air pollution, and this effect is becoming more and more serious. According to analysis, one of the causes of smog is the sulfur emitted from vehicle exhaust. caused by oxides. Sulfur-containing organic compounds in fuel oil produce such sulfur oxides during the combustion process, which brings great pollution to the atmospheric environment. Therefore, the sulfur content in fuel oil is the most important indicator of the quality of oil products. In addition, the presence of sulfur-containing compounds will lead to a series of problems such as corrosion of conveying machinery and decline in produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/00
CPCC10G27/00C10G2300/202
Inventor 郭亚菲徐航吴峰敏郭旭明
Owner HENAN UNIV OF SCI & TECH