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Application method of ionic liquid for removing sulfur from oils

An ionic liquid and oil technology, applied in the petroleum industry, refining hydrocarbon oil, refining with oxygenated compounds, etc., can solve the problems of difficult to meet deep desulfurization, large amount of ionic liquid, low single-pass desulfurization rate, etc., and achieve high economic benefits. and social benefits, less oxidant dosage, and high oil yield

Inactive Publication Date: 2011-10-12
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the single-pass desulfurization rate of direct extraction desulfurization is low, the amount of ionic liquid is large, the cost is high, and it is difficult to meet the requirements of deep desulfurization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 106.7g of chloroacetic acid solid in 200mL of deionized water, add 100mL of pyridine, and react for 30min (20-40min) under the action of an ultrasonic field with a frequency of 60kHz and a power of 500W. Washing; the above synthetic product was dissolved in 200mL of deionized water after vacuum drying, slowly added 62mL of concentrated sulfuric acid with a mass percentage concentration of 98% under the same ultrasonic field, reacted for 30min (20-40min), and rotated after the reaction Evaporate and remove water and hydrogen chloride to obtain pyridinium salt ionic liquid [CH 3 COOHPy] HSO 4 , vacuum dried for later use.

[0017] Accurately weigh 1.0325g of dibenzothiophene and dissolve it in n-octane and make the volume to 250mL to prepare a simulated oil product with a sulfur content of 1000ppm.

[0018] Add 50mL of the above-mentioned pyridinium salt ionic liquid [CH 3 COOHPy] HSO 4 With 100mL of the above simulated oil, heat up to 60°C (50-70°C) under ma...

Embodiment 2

[0020] Add 25mL of pyridinium salt ionic liquid and 100mL of simulated oil in the reaction vessel, and the remaining operations are the same as in Example 1. The sulfur content of the desulfurized oil is 31.8ppm as determined by gas chromatography, and the desulfurization rate is 96.8%.

Embodiment 3

[0022] Add 50 mL of the pyridinium salt ionic liquid described in Example 1 and 100 mL of simulated oil into the reaction vessel, raise the temperature to 60° C. under magnetic stirring, add 1.5 mL of 30% hydrogen peroxide aqueous solution by mass percentage, and carry out the rest of the operations Example 1, the sulfur content of the desulfurized oil was determined by gas chromatography to be 22.3ppm, and the desulfurization rate was 97.8%.

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Abstract

The invention relates to an application method of an ionic liquid for removing sulfur from oils. The method comprises the following steps: dissolving chloroalkyl carboxylic acid solid in deionized water and adding pyridine, fully washing with ethyl acetate, carrying out vacuum drying on the synthesized product and then dissolving into the deionized water; slowly dropwise adding concentrated sulfuric acid or concentrated phosphoric acid so as to prepare a pyridine salt ionic liquid for the desulfuration of the oils; adding the ionic liquid and imitated oils containing the sulfur content of 1000ppm, stirring and heating; adding an aqueous hydrogen peroxide solution, cooling to room temperature, and standing for layering, wherein desulfured oils are on the upper layer, carrying out rotary evaporation and reextraction on the ionic liquid on the lower layer so as to respectively achieve dehydration and separation of sulfone compounds, and carrying out vacuum drying so that the ionic liquid can be recycled. By using the method, the defects that the ionic liquid is large in dosage, high in cost and is difficult to meet deep desulfuration are overcome. The method can be used for synthesizing functionalized pyridine salt ionic liquids and used for oil oxidation / extraction deep desulfuration, the dosage of an oxidant is less, desulfuration efficiency is high, the ionic liquid can be recycled, the yield of the oils is high, cost is low, and environment is not polluted.

Description

technical field [0001] The invention relates to a desulfurization method for oil products, in particular to a method for using ionic liquid in desulfurization of oil products. Background technique [0002] Sulfur-containing substances in fuel oil will generate sulfur oxides SOx when burned at high temperature, which will cause great harm to the environment and human health. With the enhancement of people's awareness of environmental protection and the improvement of vehicle fuel exhaust emission standards, countries around the world are increasingly restricting the sulfur content of fuel oil products. It is imperative to produce and use ultra-low sulfur fuel oil, while traditional desulfurization methods are difficult. Meet the requirements of deep desulfurization. Therefore, the use of ionic liquids in oil desulfurization is an environmentally friendly deep desulfurization technology newly developed in recent years with industrial development prospects. [0003] Ionic liq...

Claims

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Application Information

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IPC IPC(8): C10G27/12C10G21/20C07D213/55
Inventor 张存王峰潘小玉
Owner YANGZHOU UNIV
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