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Method for extracting benzothiophene by utilizing deep co-melting solvent composed of tetrabutylammonium chloride and polyethylene glycol

A technology of tetra-n-butylammonium chloride and deep eutectic solvent, which is applied in the extraction of benzothiophene in deep eutectic solvent and the extraction field of benzothiophene in n-octane, and can solve problems such as unreported benzothiophene extraction. , to achieve the effect of strong selectivity, high extraction efficiency and mild operating conditions

Active Publication Date: 2013-10-02
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application of deep eutectic solvents to the extraction of benzothiophene in fuel oil has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 1.0102g of deep eutectic solvent composed of tetra-n-butylammonium chloride and polyethylene glycol (molar ratio 1:2), 1.0093g of benzothiophene n-octane solution with a concentration of 1600ppm, and stir at 25°C for 5min , the stirring speed was 800rpm, after standing for stratification, the concentration of benzothiophene in the n-octane layer was detected by gas chromatography, the concentration of benzothiophene was 494.12ppm, and the extraction rate of benzothiophene was calculated to be 69.12%.

Embodiment 2

[0023] Weigh 1.0064g of deep eutectic solvent composed of tetra-n-butylammonium chloride and polyethylene glycol (molar ratio 1:2), 1.0054g of benzothiophene n-octane solution with a concentration of 1600ppm, and stir at 25°C for 20min , the stirring speed was 800rpm, after standing and stratifying, the concentration of benzothiophene in the n-octane layer was detected by gas chromatography, the concentration of benzothiophene was 469.99ppm, and the extraction rate of benzothiophene was calculated to be 70.63%.

Embodiment 3

[0025] Weigh 1.0000g of deep eutectic solvent composed of tetra-n-butylammonium chloride and polyethylene glycol (molar ratio 1:2), 0.9976g of benzothiophene n-octane solution with a concentration of 1600ppm, and stir at 25°C for 60min , the stirring speed was 800rpm, after standing and stratifying, the concentration of benzothiophene in the n-octane layer was detected by gas chromatography, the concentration of benzothiophene was 465.95ppm, and the extraction rate of benzothiophene was calculated to be 70.88%.

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Abstract

The invention relates to a method for extracting benzothiophene by utilizing a deep co-melting solvent composed of tetrabutylammonium chloride and polyethylene glycol. Tetrabutylammonium chloride and polyethylene glycol form the deep co-melting solvent in mole ratio of 1:2, the deep co-melting solvent is mixed with a normal octane solution with the benzothiophene concentration of 200-1600ppm in mixing mass ratio of (0.5-2):1, stirring is carried out for 5-60 minutes at the temperature of 20-50 DEG C and a speed of 600-1000rpm, fully mixing and then standing and layering are carried out, and the benzothiophene concentration of a normal octane layer is detected by adopting a gas chromatographic method, so that extraction rate of benzothiophene is calculated. The method for extracting the benzothiophene by utilizing the deep co-melting solvent composed of tetrabutylammonium chloride and polyethylene glycol has the characteristics of good solubility, mild operating conditions and environmental friendliness and is an efficient and green benzothiphene extraction method.

Description

technical field [0001] The invention belongs to the field of extraction and separation, and specifically relates to a method for extracting benzothiophene with a deep eutectic solvent composed of tetra-n-butylammonium chloride and polyethylene glycol, which can be used for the extraction of benzothiophene in n-octane. Background technique [0002] In recent years, the air pollution caused by automobile exhaust has become more and more serious, and it has become the main cause of severe weather such as smog. As the main component of exhaust gas, sulfide is the most harmful. Therefore, it is of great significance to use new technology and new technology to reduce the sulfur content in fuel oil to realize the cleanliness of fuel oil. [1] . [0003] At present, the desulfurization method commonly used in industry is hydrodesulfurization. This method can effectively remove fat sulfur and non-fat sulfur in fuel oil, but it is difficult to achieve deep removal of fused-ring organ...

Claims

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Application Information

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IPC IPC(8): C07C9/14C07C7/10C10G21/27
Inventor 尹静梅邹双双李长平王爱玲崔颖娜贾颖萍李丹
Owner DALIAN UNIV
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