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Application of a cobalt-based cubic mesoporous catalyst in catalytic oxidative desulfurization and denitrogenation of oil products

A cubic mesoporous, catalyst technology, applied in molecular sieve catalysts, physical/chemical process catalysts, refining with oxygenated compounds, etc., can solve problems such as immiscibility and insufficient reaction

Active Publication Date: 2018-09-11
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although hydrogen peroxide is a green oxidizing agent, it cannot be miscible with oil, which makes the reaction insufficient. In contrast, oil-soluble oxidizing agents can overcome this problem very well

Method used

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  • Application of a cobalt-based cubic mesoporous catalyst in catalytic oxidative desulfurization and denitrogenation of oil products
  • Application of a cobalt-based cubic mesoporous catalyst in catalytic oxidative desulfurization and denitrogenation of oil products
  • Application of a cobalt-based cubic mesoporous catalyst in catalytic oxidative desulfurization and denitrogenation of oil products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 5g of KIT-6 molecular sieve to 100ml of absolute ethanol, add 25ml of cobalt nitrate solution dropwise, the concentration of cobalt is 0.25g / ml, magnetically stir for 2-3h, the obtained sample is centrifuged, washed with water and heated at 60°C Dry overnight at 550°C for 6 hours until constant weight. Get 0.1g of the catalyst prepared above, join 20ml of DBT-quinoline-n-octane solution with a sulfur concentration of 400ppm and a nitrogen concentration of 87.49ppm, then add a certain amount of cyclohexanone peroxide oxidant, O / S+ N=4, react in an oil bath at 100°C for 40 minutes; take it out and cool to room temperature, filter to obtain a clear solution, transfer it to an extraction bottle, add 10ml of N,N-dimethylformamide to extract twice, each time Stand still for 10 minutes after fully shaking, then remove the lower layer of solution, take out the oil phase, and then use gas chromatography to detect its sulfur content and nitrogen content. The sulfur content in...

Embodiment 2

[0018] Add 5g of KIT-6 molecular sieve to 100ml of absolute ethanol, add 25ml of cobalt nitrate solution dropwise, the concentration of cobalt is 0.25g / ml, magnetically stir for 2-3h, the obtained sample is centrifuged, washed with water and heated at 60°C Dry overnight at 550°C for 6 h and dry to constant weight; take 0.1 g of the above-prepared catalyst and add it to 20 ml of DBT-quinoline-n-octane solution with a sulfur concentration of 400 ppm and a nitrogen concentration of 87.49 ppm, and then add a certain A certain amount of cyclohexanone peroxide oxidant O / S+N=6, reacted in an oil bath at 100°C for 40min; take it out and cool it to room temperature, filter to obtain a clear solution, transfer it to an extraction bottle and add 10ml of N,N- Dimethylformamide extraction twice, each time will stand for 10min after fully shaking, then remove the lower solution, take out the oil phase, then detect its sulfur content and nitrogen content with gas chromatography, the sulfur co...

Embodiment 3

[0020] Add 5g of KIT-6 molecular sieve to 100ml of absolute ethanol, add 25ml of cobalt nitrate solution dropwise, the concentration of cobalt is 0.25g / ml, magnetically stir for 2-3h, the obtained sample is centrifuged, washed with water and heated at 60°C Dry overnight at 550°C for 6 h and dry to constant weight; take 0.2 g of the above-prepared catalyst and add it to 20 ml of DBT-quinoline-n-octane solution with a sulfur concentration of 400 ppm and a nitrogen concentration of 87.49 ppm, and then add a certain A certain amount of cyclohexanone peroxide oxidant O / S+N=4, react in an oil bath at 100°C for 40min; take it out and cool to room temperature, filter to obtain a clear solution, transfer it to an extraction bottle, and add 10ml of N,N- Dimethylformamide extraction twice, each time will stand for 10min after fully shaking, then remove the lower solution, take out the oil phase, then detect its sulfur content and nitrogen content with gas chromatography, the sulfur conten...

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Abstract

The invention relates to a method for removing DBT (dibenzothiophene) from an oil product by adopting a Co / KIT-6 cubic mesoporous catalyst. The method comprises steps as follows: a certain amount of P123, HCl and deionized water are weighed in sequence and stirred at the temperature of 35 DEG C, n-butyl alcohol is added, stirring is performed for 1 h at the temperature of 35 DEG C, then TEOS (tetraethoxysilane) is added, a mole ratio of P123, H2O, HCl, n-butyl alcohol and TEOS is 0.017:196.49:5.31:1.31:1, and a mixture stirred for 24 h and then subjected to hydro-thermal treatment for 24 h at the temperature of 35 DEG C; obtained white crystals are subjected to suction filtration, washed and roasted at the temperature of 550 DEG C, and KIT-6 is obtained; the Co / KIT-6 catalyst is prepared with an impregnation method; the synthesized Co / KIT-6 catalyst and an oxidizing agent cyclohexanone peroxide are added to an n-octane solution containing a certain amount of DBT and quinolone, and a mixed solution obtained after a reaction is extracted twice in sequence with DMF (N,N-dimethylformamide). The catalyst prepared with the method can have remarkable catalyzing effect on both DBT and quinolone in an n-octane system, besides, a preparation technology of the catalyst is simple, and reuse ratio is high.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and specifically relates to providing a cobalt-based cubic mesoporous catalyst and its catalytic oxidation of dibenzothiophene DBT and quinoline in oil products under certain operating conditions, and finally achieve simultaneous removal of dibenzothiophene DBT and quinoline in oil products through extraction. The purpose of sulfur and nitrogen compounds. Background technique [0002] After the use of petroleum fuels, sulfur and nitrogen elements enter the atmosphere in various ways, forming acid rain and photochemical smog, polluting the environment and seriously disrupting the ecological balance. However, when the content of sulfide and basic nitrogen compounds in the oil is high, it is difficult to remove the sulfide and nitrogen compounds in depth by adopting traditional hydrotreating measures. In particular, the presence of nitrogen compounds will affect the stability of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/14C10G27/12B01J29/03
CPCB01J29/0333C10G27/12C10G53/14C10G2300/202
Inventor 杨春平魏赛楠仇璐康丽曾光明刘红玉李惠茹刘海洋
Owner HUNAN UNIV
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