Method for desulfurizing oil through oxidation-extraction coupling

An oil and extraction technology, applied in the field of sulfide removal in oil, can solve the problems of harsh operating conditions and low desulfurization efficiency, and achieve the effects of mild operating conditions, low vapor pressure and good solubility

Inactive Publication Date: 2014-02-26
大连杰信生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, harsh operating conditions and low desulfurization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 2 g [EimC 4 SO 3 H]NTf 2 Added to 2 g of simulated oil (DBT dissolved in n-octane) containing sulfur (dibenzothiophene) 1600 ppm, followed by 1 g of H 2 o 2 (mass content 30%), after magnetic stirring for 3 h, let stand, separate layers, and detect with a gas chromatograph, the sulfur content in the oil was reduced to 17 ppm. After use, the simulated oil layer is separated, the ionic liquid layer is extracted with a solvent, the solvent is distilled off under reduced pressure, and the ionic liquid can be recycled.

Embodiment 2

[0020] 2 g [EimC 4 SO 3 H]NTf 2 Added to 2 g of simulated oil (DBT dissolved in n-octane) containing sulfur (dibenzothiophene) 1600 ppm, and then added 0.1 g H 2 o 2 (30%), after magnetic stirring for 3 h, let stand, separate layers, and detect with a gas chromatograph, the sulfur content in the oil product is reduced to 92 ppm. After use, the simulated oil layer is separated, the ionic liquid layer is extracted with a solvent, the solvent is distilled off under reduced pressure, and the ionic liquid can be recycled.

Embodiment 3

[0022] 1 g [EimC 4 SO 3 H]NTf 2 Add 2 g of simulated oil containing 1600 ppm sulfur (dibenzothiophene) (DBT dissolved in n-octane), then add 0.4 g NaClO, stir magnetically for 3 h, let stand, separate layers, and use gas chromatography The instrument was used to test, and the sulfur content in the oil was reduced to 30ppm.

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PUM

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Abstract

The invention discloses a method for desulfurizing oil through oxidation-extraction coupling. The method comprises the following steps: taking one or a mixture of a plurality of sulfonyl alkyl imidazole, sulfonyl alkyl pyridine, sulfonyl alkyl quaternary ammonium and sulfonyl alkyl quaternary phosphorus ionic liquid as a reaction medium, a catalyst and an extraction agent, taking H2O2 and NaClO as oxidants, oxidizing sulfur-containing compounds in oil into corresponding sulfone and sulfoxide compounds, extracting the compounds to enter ionic liquid with high polarity so as to remove sulfur. According to the process, the ionic liquid serves as a solvent and an extraction agent, and the method has the advantages of high solubility, mild operating conditions, low steam pressure, high structure designability and the like. Moreover, the method is pollution-free to the environment and is a high-efficiency and green desulphurization method.

Description

technical field [0001] The present invention relates to the removal technology of sulfide in oil, especially a kind of dibenzothiophene (DBT) removal technology based on functionalized ionic liquid, specifically a method for oil desulfurization by oxidation-extraction . Background technique [0002] Dibenzothiophene (DBT) and its derivatives are the main sulfur-containing compounds in heavy oil, vacuum distillate oil and residual oil, and the sulfur-containing oxides ( SO 2 , SO 3 ) is the main cause of acid rain. With the continuous improvement of environmental protection requirements, the sulfur content requirements in oil products are also becoming more and more stringent. In the United States, the sulfur content in gasoline was reduced to 15 μg / g in 2006, and the European environmental law stipulated that it should be reduced to 10 μg / g by 2009. Produce sulfur content below 1×10 -6 Ultra-low sulfur fuel oil has become an important issue facing the petroleum indust...

Claims

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Application Information

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IPC IPC(8): C10G27/12C10G27/02
Inventor 李长平李珂珂李东霞
Owner 大连杰信生物科技有限公司
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