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Choline deep-eutectic solvent extraction desulfurization method

A technology of deep eutectic solvent and choline, which is applied in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., can solve the problems of toxicity, complex synthesis, high cost, etc., and achieve mild reaction conditions, high extraction efficiency, and easy operation Effect

Active Publication Date: 2017-05-31
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the advantages of non-flammability and low vapor pressure, ionic liquids are widely used in the extraction and desulfurization of oil products. However, so far, imidazole-type or pyridine-type ionic liquids have been studied more. The disadvantages are complex synthesis, high cost, and potentially toxic

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 0.1g deep eutectic solvent [C 12 DMEA]Cl / FeCl 3 ([C 12 DMEA]Cl: dodecyl dimethyl ethanol ammonium chloride) was added to 3.5 g (5 mL, DBT) of simulated oil with a sulfur content of 500 ppm, stirred at 0°C for 1 min and then stopped, at this time the deep eutectic solvent was in the lower layer , the oil product is in the upper layer, the content of DBT in the oil is detected by GC-FID, and the removal rate of the oil product is calculated to be 5.1%.

Embodiment 2

[0028] 1 g of deep eutectic solvent [C 12 DMEA]Cl / FeCl 3 Add it to 3.5g (5mL, DBT) simulated oil with a sulfur content of 500ppm, stir at 25°C for 30min and stop. At this time, the deep eutectic solvent is in the lower layer and the oil is in the upper layer. Use GC-FID to detect the content of DBT in the oil , by calculating the removal rate of oil is 52.9%

Embodiment 3

[0030] 7 g of deep eutectic solvent [C 12 DMEA]Cl / FeCl 3 Add it to 3.5g (5mL, DBT) simulated oil with a sulfur content of 500ppm, stir at 80°C for 3 hours and stop. At this time, the deep eutectic solvent is in the lower layer and the oil is in the upper layer. Use GC-FID to detect the content of DBT in the oil , by calculating the oil removal rate of 86.2%.

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Abstract

The invention provides a choline deep-eutectic solvent extraction desulfurization method. The used choline deep-eutectic solvent is prepared by mixing quaternary ammonium salts containing ethanol base and metal halides. The extraction desulfurization method comprises the following steps: adding the choline deep-eutectic solvent into oil, stirring and reacting for a period of time, and stopping stirring. According to the method disclosed by the invention, after the reaction is ended, because the deep-eutectic solvent and the oil present two phases, the oil can be separated by simple pouring; the prepared deep-eutectic solvent can be directly recycled and can be used after regeneration.

Description

technical field [0001] The invention relates to extraction desulfurization, in particular to a method for extracting desulfurization with a choline-based deep eutectic solvent. Background technique [0002] In recent years, due to the sulfur compounds in fuel oil will eventually be converted to SO x , which is the main cause of air pollution and acid rain. Therefore, desulfurization of fuel oil has become a worldwide theme. The limitation of sulfur content in fuel oil is becoming more and more stringent, and it is strictly required to reduce the pollution of the environment. Therefore, in the near future, the "sulfur-free" specification is about to be proposed. However, the traditional industrial desulfurization method is hydrodesulfurization (HDS), which requires high temperature (240-300° C.) and high pressure (1.6-3.2 MPa). Conventional hydrodesulfurization is not effective for the removal of cyclic aromatic sulfides, such as dibenzothiophene (DBT) and its derivatives...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G21/06
CPCC10G21/06C10G2300/202
Inventor 蒋伟董蕾李宏平张铭朱文帅李华明
Owner JIANGSU UNIV