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Method for extracting and removing benzothiophene

A technology for removing benzothiophene, which is applied in the petroleum industry, treating hydrocarbon oil, refining hydrocarbon oil, etc., can solve the problem that thiophene and its derivatives and other condensed ring organic sulfides cannot be removed, and achieve mild operating conditions and environmental protection Friendly, simple synthesis process effect

Inactive Publication Date: 2017-10-13
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this traditional desulfurization method cannot remove condensed ring organic sulfides such as thiophene and its derivatives.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 0.5002g of deep eutectic solvent composed of tetrabutylammonium chloride, polyethylene glycol and copper chloride (molar ratio 4:1:0.05), 1.0093g of benzothiophene n-octane solution with a concentration of 1600ppm, 25 Stirring at ℃ for 10 min at a stirring rate of 600 rpm, after static separation, the concentration of benzothiophene in the n-octane layer was detected by gas chromatography, and the extraction rate of benzothiophene was calculated to be 85.12%.

Embodiment 2

[0018] Weigh 1.0032g of deep eutectic solvent composed of tetrabutylammonium chloride, propionic acid and copper chloride (molar ratio 4:1:0.05), 1.0013g of benzothiophene-n-octane solution with a concentration of 1600ppm, at 25°C Stir for 15 minutes at a stirring rate of 600 rpm. After standing and stratifying, the concentration of benzothiophene in the n-octane layer was detected by gas chromatography, and the extraction rate of benzothiophene was calculated to be 87.39%.

Embodiment 3

[0020] Weigh 2.0052g of deep eutectic solvent composed of tetrabutylammonium chloride, propionic acid and cobalt chloride (molar ratio 4:1:0.05), 1.0093g of benzothiophene-n-octane solution with a concentration of 1200ppm, at 30°C Stir for 20 min at a stirring rate of 800 rpm. After standing and stratifying, the concentration of benzothiophene in the n-octane layer was detected by gas chromatography, and the extraction rate of benzothiophene was calculated to be 87.97%.

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Abstract

The invention belongs to the field of extraction and separation, and in particular relates to a method for extraction and removal of benzothiophene. The hydrogen bond acceptor, hydrogen bond donor and metal chloride are synthesized into a deep eutectic solvent with a molar ratio of 4:1:0.05, and a n-octane solution with an initial concentration of benzothiophene of 200-2500ppm is prepared, and the deep eutectic solvent Mix with the n-octane solution of benzothiophene at a mass ratio of 0.2:1 to 5:1, stir at 20°C to 75°C for 5 to 30 minutes, and stir at a speed of 600 to 1200rpm, mix well and let stand to separate layers. The synthesis process of the deep eutectic solvent prepared by the invention is simple and high-purity products can be obtained without introducing other organic solvents, and the atom economy reaches 100%. The extraction method is simple, the extraction efficiency is high, the operating conditions are mild, the environment is friendly, and the deep removal of benzothiophene can reach more than 85%.

Description

technical field [0001] The invention belongs to the field of extraction and separation, and in particular relates to a method for extracting benzothiophene with a three-component metal deep eutectic solvent. Background technique [0002] Organosulfur compounds in fuel oil are the main pollutants in the environment and an important problem in industry, which has attracted worldwide attention. Because the combustion of motor vehicles will produce important pollutants SO x Cause acid rain, smog and other environmental problems [1] . At present, most countries have strict requirements on the sulfur content in fuel oil. In order to prevent pollutants emitted by automobiles, new technologies to reduce the sulfur content in fuel oil have become the main trend of current research [2-4] . [0003] At present, the commonly used desulfurization method in industry is hydrodesulfurization (HDS) [5-8] . This method is mainly used to extract fat sulfur and non-fat sulfur such as merc...

Claims

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Application Information

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IPC IPC(8): C10G21/06
CPCC10G21/06C10G2300/202
Inventor 马倩倩李长平李慎敏尹静梅崔颖娜
Owner DALIAN UNIV
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