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Method for removing organic sulfur of containing thiophene cycle in fuel oil

A technology of thiophene rings and organic sulfur, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of unsatisfactory desulfurization effect of extractant, low practical value, easy reaction with water, etc., and achieve easy solvent regeneration and strong practicability , the effect of mild operating conditions

Inactive Publication Date: 2009-10-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Except for [BMIM][Cl / AlCl 3 ], the desulfurization effect of other extractants is not ideal
while [BMIM][Cl / AlCl 3 ] There is also the problem that it is easy to react with water, and it cannot be directly exposed to the air for use, so the practical value is not high

Method used

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  • Method for removing organic sulfur of containing thiophene cycle in fuel oil
  • Method for removing organic sulfur of containing thiophene cycle in fuel oil
  • Method for removing organic sulfur of containing thiophene cycle in fuel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The gasoline used is 97# commercial gasoline, and the extractant is N-methylimidazole produced by Zhejiang Linhai Kaile Chemical Factory.

[0024] Mix 20 grams of 97# commercial gasoline (the sulfur content is 130.25 mg / kg, i.e. ppmw) with 20 grams of N-methylimidazole (i.e. oil agent mass ratio 1: 1) in a 250 ml Erlenmeyer flask, at 298.15K Stir at room temperature for 15 minutes, then transfer to a separatory funnel and let stand for 30 minutes to separate the layers. The upper layer is desulfurized gasoline, and its mass is reduced to 17.3 grams. The sulfur content of 97# commercial gasoline was reduced from 130.25ppmw to 40.89ppmw after primary extraction, the desulfurization rate was 69%, and the corresponding partition coefficient was 2.18. Due to the dissolution of gasoline in the extractant, the mass of the lower extractant increased to 22.7 grams.

[0025] Add 40 grams of water to the above-mentioned 22.7 grams of extractant, stir at room temperature for 15 m...

Embodiment 2

[0028] The gasoline used is straight-run gasoline (provided by Shandong Qilu Oil Refinery), and the extraction agent [BMIM][DMP] is prepared by the method disclosed in the Chinese patent (publication number CN 1785524A) whose application number is 200410096841.3.

[0029] Straight-run gasoline with a sulfur (dibenzothiophene) content of 601.01 ppmw was prepared. 20 grams of 601.01ppmw straight-run gasoline and 20 grams of [BMIM] [DMP] (i.e. oil agent mass ratio 1: 1) were mixed in a 250 ml Erlenmeyer flask, stirred for 15 minutes at a room temperature of 298.15K, and then Transfer to a separatory funnel and let stand for 30 minutes to separate the layers clearly. The upper layer is desulfurized gasoline, and its mass is reduced to 19.29 grams. The sulfur content of straight-run gasoline is reduced from 601.01ppmw to 233.86ppmw after primary extraction, the desulfurization rate is 61%, and the corresponding sulfur partition coefficient is 1.57. Due to the dissolution of gasol...

Embodiment 3

[0033] The diesel oil used is straight-run diesel oil (provided by Qilu Oil Refinery), and the extractant is N-methylimidazole (MIM)+20% [EMIM] [DEP] (mass percentage) mixed solvent produced by Zhejiang Linhai Kaile Chemical Factory, [EMIM ][DEP] is prepared by the method disclosed in the Chinese patent (publication number CN1785524A) whose application number is 200410096841.3.

[0034]20 grams of 498.31ppmw diesel oil and 20 grams of MIM+20% [EMIM] [DEP] mixed solvent (i.e. oil agent mass ratio 1: 1) are mixed in a 250 ml Erlenmeyer flask, stirred at a room temperature of 298.15K 15 minutes, then transfer to a separatory funnel and let stand for 30 minutes to separate the layers clearly. The upper layer is desulfurized diesel oil, and its mass is reduced to 17.87 grams. After the first-stage extraction, the sulfur content of diesel oil is reduced from 498.31ppmw to 183.88ppmw, the desulfurization rate is 63%, and the corresponding sulfur partition coefficient is 1.71. Due t...

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Abstract

A method for removing organic sulfur containing thiophene rings in fuel oil belongs to the technical field of fuel oil desulfurization. It is characterized in that: the extractant used is the N-alkylimidazole of the structural formula (I), the phosphate ionic liquid of the alkylimidazole of the structural formula (II) or the mixture of the former two, in the structural formula ( In I) and (II), R, R1 and R2 are linear or branched alkyl groups having 1 to 4 carbon atoms. After the extractant after the extraction operation is added water and left to stand for stratification, the lower layer of the extractant aqueous solution is distilled to remove the water to obtain a regenerated extractant. The method has the advantages of strong desulfurization ability, simple operation and suitability for industrialization.

Description

technical field [0001] The invention belongs to the technical field of fuel oil desulfurization, in particular to extraction desulfurization technology. Background technique [0002] In the desulfurization technology of fuel oil, catalytic hydrodesulfurization (HDS) is a commonly used desulfurization method. This method uses Co / Mo and Ni / Mo as catalysts, at high temperature (300-350°C) ) to convert the sulfur compounds in the oil into H by hydrogenation 2 S removed. Due to the extremely low hydrogenation rate constants of thiophene, benzothiophene, dibenzothiophene and their alkyl derivatives, it is difficult to achieve deep removal of organic sulfur containing thiophene rings by this method. Therefore, HDS must be combined with other methods to reduce the sulfur content in oil to a lower level (according to European and American standards, the sulfur content of gasoline is less than 30ppmw, and the sulfur content of diesel is less than 15ppmw). Extraction is one way to f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G21/24C10G21/20C10G21/28
Inventor 李春喜聂毅王子镐
Owner BEIJING UNIV OF CHEM TECH