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Method for extracting removal of sulfides from fuel oil by using polyether type octadecylamine ionic liquid

A polyether-type octadecylamine and ionic liquid technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, refined hydrocarbon oil, etc., can solve the problems of complex synthesis steps, expensive cost of ionic liquid, low recycling rate, etc., and achieve simple operation , simple equipment requirements, high desulfurization rate

Active Publication Date: 2015-04-29
QINGDAO UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0005] Due to the high cost of ionic liquids, complex synthesis steps and low recycling rate, the currently developed ionic liquid extraction and desulfurization technology can only be limited to the stage of basic theoretical research, and the realization of industrialization still needs to be developed and researched on new cheap ionic liquids.

Method used

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  • Method for extracting removal of sulfides from fuel oil by using polyether type octadecylamine ionic liquid
  • Method for extracting removal of sulfides from fuel oil by using polyether type octadecylamine ionic liquid
  • Method for extracting removal of sulfides from fuel oil by using polyether type octadecylamine ionic liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: 2.6951 g of octadecylamine and 10 mL of absolute ethanol were added into a high-pressure reactor, and placed in a refrigerator to freeze overnight. Then add 30mL ethylene oxide, seal, and use 5MPa N 2 Replace the air in the kettle 3 to 5 times. Stir at room temperature for 2 hours, then insulate and react at 70°C for 8 hours, lower the temperature, release the pressure, open the kettle, and transfer the reaction mixture into a three-neck flask. The absolute ethanol was removed by distillation under reduced pressure to constant weight to obtain intermediate 1, and the average degree of polymerization (n) of intermediate 1 could be calculated according to the product weight gain method. Add intermediate 1 and benzyl chloride of the amount of the same substance in the reaction kettle, and use N 2 Replace the air in the kettle 3 to 5 times, blow in N 2 To 5MPa, react at 90°C for 10h. Lower the temperature, release the pressure, open the kettle, move the react...

Embodiment 2

[0022] Embodiment 2: Accurately weigh 3.00g ionic liquid (X=Cl, R=CH 2 C 6 h 5 , n=60) and 2.00 g of simulated oil (dibenzothiophene, with a sulfur content of 500 ppm) were placed in a 50 mL round-bottomed flask, quantitative aids and a rotor were added, and the reaction was stirred and reacted in a water bath at 40° C. for 5 min. The desulfurization rate is 79.1%.

Embodiment 3

[0023] Embodiment 3: Accurately weigh 3.00g ionic liquid (X=Cl, R=CH 2 C 6 h 5 , n=30) and 2.00 g of simulated oil (dibenzothiophene, with a sulfur content of 500 ppm) were placed in a 50 mL round-bottomed flask, quantitative aids and a rotor were added, and the reaction was stirred in a water bath at 40°C for 5 min. The desulfurization rate is 72.3%.

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Abstract

The invention relates to a new method for removing sulfides from fuel oil. The method is characterized in that low-price polyether type octadecylamine ionic liquid is used as an extracting agent, and a simulated oil product and real gasoline are extracted for sulfide removal at a temperature close to room temperature. Under the conditions that the agent-oil mass ratio is (1.5:1)-(3.5:1), the reaction temperature is 30-40 DEG C and the reaction time is 5-10 minutes, almost complete removal of dibenzothiophene, benzothiophene, methyl phenyl sulfide, phenyl sulfide, benzothiophene sulfone and dibenzothiophene sulfone in the simulated oil product is realized by virtue of secondary-stage extraction, the sulfides in 90# and 93# real gasoline are removed, and the third-stage desulfurization rates are 72.3% and 89.4% respectively. Compared with the prior art, the method provided by the invention has the following characteristics: (1) the ionic liquid is low in cost and good in stability, has almost no residue in oil products, and is high in reuse rate; (2) the energy consumption is low (the reaction can be performed at room temperature and the reaction time is short); (3) the equipment requirement is simple; and (4) a new method is provided for an extraction-oxidation coupling desulfurization process.

Description

technical field [0001] The invention relates to a new method for desulfurizing fuel oil, in particular to a new method for removing sulfide in fuel oil by using a novel ionic liquid extraction. Background technique [0002] In recent years, with the rapid development of the petrochemical industry and the automobile industry, the problem of air pollution caused by automobile exhaust has become increasingly serious. Sulfur in fuel is not only one of the important factors leading to air pollution, but it can also lead to deactivation and poisoning of catalysts in automobile exhaust purifiers. In order to meet the increasingly stringent environmental protection requirements and improve the international competitiveness of my country's oil products, it has become a top priority to carry out research on deep desulfurization technology for fuel oil. [0003] Traditional fuel desulfurization methods mainly include selective hydrodesulfurization, adsorption desulfurization, and orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G21/27
CPCC10G21/27C10G2300/201
Inventor 于凤丽柳春玉解从霞袁冰于世涛
Owner QINGDAO UNIV OF SCI & TECH
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