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A method for diesel desulfurization

A diesel desulfurization and diesel technology, applied in the treatment of hydrocarbon oil, petroleum industry, etc., can solve the problems of high operating cost, harsh process conditions, large investment, etc., and achieve the effect of high-efficiency desulfurization and mild reaction conditions

Active Publication Date: 2019-12-03
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The development of traditional industrial hydrodesulfurization is relatively mature, the investment of hydrodesulfurization (HDS) technology equipment is large, the process conditions are harsh, and the operating cost is high
It can effectively remove mercaptans, thioethers and disulfides, but the problem with this method is that it is difficult to remove 4,6-dimethyldibenzothiophene and its derivatives deeply to achieve the purpose of deep desulfurization

Method used

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  • A method for diesel desulfurization
  • A method for diesel desulfurization
  • A method for diesel desulfurization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of eutectic agent: Mix p-toluenesulfonic acid:polyethylene glycol 4000=1:2 (molar ratio), heat up to 80°C, stir vigorously, and react for 1h. After the reaction was completed, it was cooled to room temperature to obtain a deep eutectic solvent.

[0029] Diesel desulfurization: Add 4 g of eutectic solvent and 20 g of model diesel oil (dibenzothiophene dissolved in decahydronaphthalene, S: 500 ppm) into a 100 mL three-neck round bottom flask, put them in an oil bath, and set the temperature at 60 ℃, stirring and extracting for 30min, adding catalyst (NH 4 ) 3 Co(OH) 6 Mo 6 o 18 Put 20mg into a round bottom flask, feed oxygen at a flow rate of 60ml / min, stir and start the reaction by timing, stop stirring at 60min, and after standing for stratification, sample 0.5-1.0mL from the upper diesel phase into a sample bottle. The sulfur content was determined by GC-FID. The desulfurization rate reaches 100%.

[0030] Recycling of eutectic solvent and catalyst:...

Embodiment 2

[0032] Preparation of eutectic agent: Mix p-toluenesulfonic acid:polyethylene glycol 4000=1:2 (molar ratio), heat up to 80°C, stir vigorously, and react for 1h. After the reaction was completed, it was cooled to room temperature to obtain a deep eutectic solvent.

[0033] Diesel desulfurization: Add 4 g of eutectic solvent and 20 g of model diesel oil (dibenzothiophene dissolved in decahydronaphthalene, S: 500 ppm) into a 100 mL three-neck round bottom flask, put them in an oil bath, set the temperature at 100 ℃, stirring and extracting for 30min, adding catalyst (NH 4 ) 3 Co(OH) 6 Mo 6 o 18 Put 20mg into a round bottom flask, feed oxygen at a flow rate of 60ml / min, stir and start the reaction by timing, stop stirring at 30min, and after standing for stratification, sample 0.5-1.0mL from the upper diesel phase into a sample bottle. The sulfur content was determined by GC-FID. The desulfurization rate reaches 100%.

Embodiment 3

[0035] Preparation of eutectic agent: Mix p-toluenesulfonic acid:polyethylene glycol 4000=1:1 (molar ratio), heat up to 80°C, stir vigorously, and react for 1h. After the reaction was completed, it was cooled to room temperature to obtain a deep eutectic solvent.

[0036] Diesel desulfurization: add 4 g of deep eutectic solvent and 20 g of model diesel oil (dibenzothiophene dissolved in decahydronaphthalene, S: 500 ppm) into a 100 mL round bottom flask respectively, put them in an oil bath, and set the temperature at 60 °C , stirring and extracting for 30min, adding catalyst (NH 4 ) 3 Co(OH) 6 Mo 6 o 18Put 20mg into a round bottom flask, feed oxygen at a flow rate of 60ml / min, stir and start the reaction by timing, stop stirring at 60min, and after standing for stratification, sample 0.5-1.0mL from the upper diesel phase into a sample bottle. The sulfur content was determined by GC-FID. The desulfurization rate reaches 93%.

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Abstract

The invention discloses a diesel desulphurization method. The diesel desulphurization method comprises the following steps: (1) mixing para-toluenesulfonic acid and polyethylene glycol 4000, heating and uniformly stirring at 80 DEG C, reacting for one hour, and then cooling to the room temperature, thus obtaining an eutectic agent; (2) mixing the eutectic agent and diesel, stirring, then adding acatalyst, introducing oxygen, and performing the oxidation desulphurization reaction, thus obtaining mixed liquid; (3) enabling the mixed liquid to stand until the mixed liquid is divided into an upper layer and a lower layer, and decanting and pouring the diesel on the upper layer, thus obtaining desulphurized diesel; and (4) performing the rotary evaporation on a mixture of the eutectic agent and the catalyst on the lower layer at 60 DEG C for one hour to remove water, thus obtaining the recycled eutectic agent and the catalyst, and recycling the eutectic agent and the catalyst. The diesel desulphurization method disclosed by the invention not only can effectively remove sulfide which is difficult to remove in the diesel in the technological process, but also adopts mild reaction conditions; and the eutectic agent and the catalyst are recyclable, no pollution is caused for the environment, and the diesel desulphurization method disclosed by the invention is a green and efficient desulphurization method.

Description

technical field [0001] The invention relates to a method for desulfurizing diesel oil, which belongs to the field of desulfurization of petroleum products. Background technique [0002] After the fuel oil is burned by the engine, the organic sulfur compounds contained in it are oxidized into various sulfur oxides (SOx). The sulfur content in diesel has a significant promotion effect on NOx and PM, and 98% of the sulfur in diesel is converted into SO in combustion 2 , which is further converted into sulfate by the exhaust catalyst and becomes a part of PM. In the past two years, large-scale and long-term smog have occurred in various places in my country. In 2013, among the 74 monitored cities in the country, 33 cities had more than 300 detection data at some detection stations, and the air quality reached serious pollution. On December 6, 2013, the Central Meteorological Observatory issued an orange warning for haze, and on the 7th, it issued an orange warning for heavy fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G57/00
CPCC10G57/00
Inventor 吕宏缨孙璐璐任万忠邓昌亮
Owner YANTAI UNIV