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Method for removing sulfide from gasoline and diesel oil through extraction of ion liquid

A technology of ionic liquid, gasoline and diesel oil, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of gasoline loss, low desulfurization rate, easy decomposition, etc., and achieve the effect of no corrosion, excellent regeneration performance, and easy separation

Inactive Publication Date: 2006-09-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is a part of literature report that ionic liquid is used on the extraction desulfurization of gasoline and diesel oil, such as Bsmann (Chem. Ionic liquids are easy to decompose when encountering water, moisture or air during the extraction process, and when extracting desulfurized gasoline, the olefins in gasoline will be polymerized, resulting in a large loss of gasoline
Akzo-Nobel Chemical Company (Ind.Eng.Chem.Prod.Res.2004, 43, 614-622) adopts [EMIM][BF4], [BMIM][PF6], [MOIM][BF4], [HMIM] [PF6] ionic liquid has been used for gasoline desulfurization. Although the problem of water stability of ionic liquid has been solved, since the desulfurization of this type of ionic liquid mainly relies on the similar aromaticity of imidazolium cation and sulfur compounds such as thiophene in oil, desulfurization rate is low, only about 10%

Method used

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  • Method for removing sulfide from gasoline and diesel oil through extraction of ion liquid
  • Method for removing sulfide from gasoline and diesel oil through extraction of ion liquid
  • Method for removing sulfide from gasoline and diesel oil through extraction of ion liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Slowly add 0.56 moles (55.47 grams) of CuCl into 0.282 moles (49.209 grams) of methyl butylimidazole chloride [BMIMCl], use n-heptane as a solvent, nitrogen protection, stir at room temperature for 30 minutes, then heat up Stirring was continued for 2 hours to 80° C. to complete the reaction. After cooling, the reactant was separated into two phases, the upper layer was heptane, and the lower layer was the synthesized ionic liquid.

Embodiment 2

[0030] 0.56 moles (76.16 grams) of ZnCl 2 Slowly add 0.282 moles (49.209 grams) of methyl butylimidazole chloride [BMIMCl], use n-heptane as solvent, nitrogen protection, stir at room temperature for 30 minutes, then heat up to 80 ° C, continue stirring for 2 hours , so that the reaction is complete, the reactant is divided into two phases after cooling, the upper layer is heptane, and the lower layer is the synthesized ionic liquid.

Embodiment 3

[0032] In the reaction process of preparing the ionic liquid, n-heptane is not needed as a solvent, and other conditions are the same as in Example 1.

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Abstract

The invention discloses a sulfide removal method in the petrol and diesel through ionic liquid extraction, which is characterized by the following: using ionic liquid as extractive solvent; proceeding extraction at atmosphere pressure, 5-6 deg.c; applying ionic liquid from alkylate hydrohalogenate, imidazolium or imidazolium alkylation, pyridine or pyridine alkylation, sulfonium or sulfonium alkylation as positive ionic source material; taking metal halide as ionic liquid of negative ionic source. The invention can improve desulfurizing effect without decreasing petrol octane value and diesel condensation point, which can meet the increasingly harsh environmetal standard.

Description

Technical field: [0001] The invention relates to a method for extracting and removing sulfides in gasoline and diesel by using ionic liquid. Background technique: [0002] With the increasingly stringent environmental protection regulations, the quality requirements for gasoline and diesel fuel are becoming more and more stringent worldwide. In this case, the production of low-sulfur "clean fuel" is the general trend. [0003] At present, the common method used to reduce the sulfur content of gasoline and diesel is hydrodesulfurization, but the effect of hydrogenation technology is not ideal when it is used to produce deeply desulfurized gasoline and diesel products. For example, deep hydrotreating to remove thiophenes, the main organic sulfur compounds in gasoline, not only requires higher pressure and temperature, but also tends to saturate olefins, consume a large amount of hydrogen, and reduce the octane number of the product. [0004] Most of the sulfides contained in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G21/20
Inventor 陈标华黄崇品张傑任鹏举李英霞
Owner BEIJING UNIV OF CHEM TECH
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