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A kind of method for adsorption and removal of dibenzothiophene

A technology for removing dibenzothiophene, applied in the field of adsorption and separation, can solve the problems of limited adsorption capacity, limited application scope, small layer spacing, etc., and achieves the effects of low cost, environmental friendliness and mild operating conditions

Active Publication Date: 2022-07-08
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, montmorillonite also has a series of properties such as expansion, ion exchange, adsorption, dispersion, stability and non-toxicity. [4] , but because the active sites of montmorillonite are occupied, the interlayer distance is small, and the adsorption capacity is limited, which limits its application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 0.2008 g of PEG200-sodium montmorillonite composite adsorbent and 1.0032 g of dibenzothiophene n-octane solution with a sulfur concentration of 1600 ppm, stir at 25 ° C for 30 min, and stir at a speed of 600 rpm. The concentration of sulfur in the n-octane layer was detected by gas chromatography, and the calculated desulfurization rate was 73.44%.

Embodiment 2

[0025] Weigh 0.2010 g of PEG400-sodium montmorillonite composite adsorbent and 1.0039 g of dibenzothiophene n-octane solution with a sulfur concentration of 1600 ppm, stir at 25 ° C for 30 min, and stir at a speed of 600 rpm, and after standing for stratification, use The concentration of sulfur in the n-octane layer was detected by gas chromatography, and the calculated desulfurization rate was 75.90%.

Embodiment 3

[0027] Weigh 0.2009 g of PEG600-sodium montmorillonite composite adsorbent and 1.0038 g of dibenzothiophene n-octane solution with a sulfur concentration of 1600 ppm, stir at 25°C for 30 min, and stir at a speed of 600 rpm. The concentration of sulfur in the n-octane layer was detected by gas chromatography, and the calculated desulfurization rate was 77.84%.

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PUM

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Abstract

A method for adsorbing and removing dibenzothiophene belongs to the field of adsorption and separation. The method adopted by the present invention to solve the technical problem is to contact an adsorbent with a mixture, wherein the adsorbent is a composite adsorbent synthesized from polyethylene glycol and sodium-based montmorillonite; the mixture comprises dibenzothiophene and at least one a solvent. The method provided by the invention has the advantages of low cost, mild operating conditions, high extraction and removal efficiency and environmental friendliness.

Description

technical field [0001] The invention relates to the field of adsorption and separation, in particular to a method for removing dibenzothiophene by adsorption. Background technique [0002] With the rapid development of modern cities, the number of motor vehicles has grown exponentially, and the level of all pollutants emitted by motor vehicles is closely related to the sulfur content in the oil. In order to protect the environment, countries around the world have successively promulgated more and more stringent standards for the sulfur content of light oil products. At present, my country imports a large amount of high-sulfur crude oil, resulting in high sulfur content in domestic gasoline, so it is extremely important to remove sulfides in fuel oil, especially the deep removal of organic sulfides is the focus of current desulfurization research. [0003] Although traditional hydrodesulfurization methods can effectively remove small-molecule sulfur compounds such as mercapt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G25/00
CPCC10G25/003C10G2300/202Y02A50/20
Inventor 崔颖娜贾颖萍李慎敏刘璇
Owner DALIAN UNIV