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Method of applying modified catalyst to catalytic oxidation DBT (dibenzothiophene) removal

A catalyst and solvent technology, applied in the field of mesoporous molecular sieve immobilized heteropolyacids, can solve the problems of small specific surface area, difficult to recycle, fast deactivation, etc., to achieve the effect of increasing specific surface area, facilitating recovery and improving activity

Inactive Publication Date: 2013-02-13
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For catalytic oxidative desulfurization reactions, heteropolyacid catalysts and their amphiphile catalysts are excellent active components, but their specific surface area is small, and they are easy to lose in the reaction, deactivate quickly, and are difficult to recycle. Develop more economical, environmentally friendly and easily recyclable catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1 gets 2.67g TEA and 1.67g H 2 o 2 Mix, weigh 0.3g HPW and add it to the above solution, stir and dissolve evenly, then weigh 5.2g TEOS and slowly add dropwise to the above solution, stir at room temperature for 30min, and gradually form a colloid. Finally, 4.4 g of TEAOH was added dropwise to the above mixture with stirring, and the stirring was continued after the dropwise addition until the mixture formed a solidified solid. The molar ratio of each component in this mixture is TEOS:TEA:TEAOH:H 2 O=1:0.72:0.3:11, the amount of HPW is about 20wt% of the mass of silica. The solid was aged at room temperature for 20 hours, dried at 100°C, and then placed in a polytetrafluoroethylene reactor for crystallization at 150°C for 8 hours. Finally, put it into a tube furnace for calcination at 400°C for 10h (programmed temperature increase 1°C / min). The obtained solid was refluxed at 30° C. for 8 h in a toluene solution containing trimethylchlorosilane solvent. S...

Embodiment 2

[0011] Embodiment 2 gets 3.73g TEA and 1.67g H 2 o 2 Mix, weigh 0.15g HPW and add it to the above solution, stir and dissolve evenly, then weigh 5.2g TEOS and slowly add dropwise to the above solution, stir at room temperature for 30min, and gradually form a colloid. Finally, 4.4 g of TEAOH was added dropwise to the above mixture with stirring, and the stirring was continued after the dropwise addition until the mixture formed a solidified solid. The molar ratio of each component in this mixture is TEOS:TEA:TEAOH:H 2 O=1:1:0.3:11, the amount of HPW is about 10wt% of the mass of silica. The solid was aged at room temperature for 20 hours, dried at 100°C, and then placed in a polytetrafluoroethylene reactor for crystallization at 150°C for 8 hours. Finally, put it into a tube furnace for calcination at 400°C for 10h (programmed temperature increase 1°C / min). The obtained solid was refluxed at 30° C. for 8 h in a toluene solution containing trimethylchlorosilane solvent. Suc...

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Abstract

The invention relates to a method of applying a modified catalyst to catalytic oxidation DBT (dibenzothiophene) removal. The method comprises the following steps: taking a nonsurfactant as mesoporous molecular sieves of a template, immobilizing HPA (heteropolyacid) on a TUD-1 molecular sieve skeleton by a one-step synthesis method, and serving as a catalyst after being modified by a methyl-rich solvent, to remove DBT in simulated oil by catalytic oxidation, wherein the catalyst adopts TEA (triethanolamine) as the template, and HPA (such as phosphotungstic acid and phosphomolybdic acid) as active components, and the catalyst is remarkably improved in the lipophilicity after being modified by methyl-rich solvent (such as trimethylchlorosilane and methyltrimethoxysilane); and the removal rate of DBT reaches over 95% after applying the catalyst to the experiments of removing DBT by catalytic oxidation.

Description

technical field [0001] The invention relates to a method for preparing a mesoporous molecular sieve immobilized heteropolyacid (HPA, such as phosphotungstic acid, phosphomolybdic acid, etc.) using a non-surfactant as a template. Chlorosilane, methyltrimethoxysilane, etc.) modified as a catalyst for the method of catalytic oxidation removal of dibenzothiophene (DBT) in simulated oil. in methanol, H 2 o 2 The presence of DBT can be effectively removed. Background technique [0002] Combustion of sulfide in oil will cause serious pollution to the environment, forcing countries all over the world to formulate clean fuel standards and greatly increase the limit on sulfur content. At present, domestic and foreign oil desulfurization methods are mainly divided into hydrodesulfurization and non-hydrogenation desulfurization. As we all know, hydrodesulfurization is a reaction that primary oil must undergo, such as publication numbers CN1244568A and CN1244569A, but hydrodesulfuriz...

Claims

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Application Information

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IPC IPC(8): C10G27/12B01J31/34B01J31/16
Inventor 代斌康丽华汤玲朱明远
Owner SHIHEZI UNIVERSITY
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