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Extraction method of benzothiophene

A benzothiophene extraction technology, which is applied in the petroleum industry, organic chemistry, refined hydrocarbon oil, etc., can solve the unreported problems of benzothiophene extraction and achieve the effects of strong selectivity, high extraction efficiency, and mild operating conditions

Active Publication Date: 2013-10-23
DALIAN UNIVERSITY
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  • Abstract
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  • 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 4

[0032] The deep eutectic solvent used in Example 4 is composed of tetra-n-butylammonium chloride and propionic acid in a molar ratio of 1:5, and the preparation steps and conditions are the same as the above method.

Embodiment 1

[0034] Weigh 1.0090g of deep eutectic solvent composed of tetra-n-butylammonium chloride and propionic acid (molar ratio 1:2), 1.0104g of n-octane solution of benzothiophene with a concentration of 1600ppm, stir at 25°C for 30min, Stirring rate is 800rpm, after static layering, detect the concentration of benzothiophene in the n-octane layer after extraction by gas chromatography, the concentration of benzothiophene is 472.99ppm, the extraction rate of benzothiophene is calculated to be 70.44% .

Embodiment 2

[0036] Weigh 1.6453g of deep eutectic solvent composed of tetra-n-butylammonium chloride and propionic acid (molar ratio 1:2), 0.8179g of n-octane solution of benzothiophene with a concentration of 1600ppm, stir at 25°C for 30min, Stirring rate is 800rpm, after static layering, detect the concentration of benzothiophene in n-octane layer after extraction by gas chromatography, the concentration of benzothiophene is 274.68ppm, the extraction rate of benzothiophene is calculated to be 82.83% .

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PUM

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Abstract

The invention relates to an extraction method of benzothiophene, belonging to the field of extraction and separation. The extraction method of the benzothiophene comprises the step of enabling an extraction agent to be in contact with a mixture, wherein the extraction agent is a deep-eutectic solvent constituted by tetra-n-butylammonium chloride and propanoic acid according to the molar ratio of (1: 1)-(1: 5); and the mixture is constituted by the benzothiophene and n-octane. The extraction method disclosed by the invention has the advantages of high extraction efficiency, strong selectivity, capability of deeply removing the benzothiophene to below 10ppm, mild operation conditions and environmental friendliness.

Description

technical field [0001] The invention relates to a method for extracting benzothiophene, belonging to the field of extraction and separation. 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 organic sulfur compounds such as thiophene and its derivatives. Moreover, the reaction conditions are harsh and the cost of desulfurization is high. Therefore, it is imminent to carr...

Claims

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Application Information

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IPC IPC(8): C10G21/12C10G21/20C07D333/54
Inventor 李长平尹静梅邹双双崔颖娜王爱玲李丹
Owner DALIAN UNIVERSITY
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