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Method for removing sulfide from oil product by using choline chloride/oxalic acid type eutectic solvent by virtue of oxidation-extraction integrated process

A technology of deep eutectic solvent and choline chloride, which is applied in the fields of refining with oxygenated compounds, petroleum industry, refining hydrocarbon oil, etc., can solve the limitation of large-scale industrial application and development, complex synthesis process of ionic liquid, difficulty in purification, etc. problems, to achieve the effect of reducing production costs, simplifying desulfurization procedures, and enhancing environmental performance

Inactive Publication Date: 2014-10-08
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional ionic liquids have disadvantages such as complex synthesis process, difficult purification, and high cost, which limit their large-scale industrial application and development.

Method used

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  • Method for removing sulfide from oil product by using choline chloride/oxalic acid type eutectic solvent by virtue of oxidation-extraction integrated process
  • Method for removing sulfide from oil product by using choline chloride/oxalic acid type eutectic solvent by virtue of oxidation-extraction integrated process

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A certain amount of dibenzothiophene (DBT) was weighed and dissolved in n-octane to prepare a simulated oil with a sulfur content of 500ppm. Weigh 10 mL of simulated oil and 8 mL of choline chloride / oxalic acid deep eutectic solvent into a 50 mL Erlenmeyer flask, add 0.1 mL of H 2 o 2 . After stirring at 40°C for 180 min, the mixture was cooled to room temperature, separated into layers in a separatory funnel, and the sample in the upper oil phase was drawn, and the sulfur content was measured with a WK-2D microcoulomb comprehensive analyzer and the desulfurization rate was calculated to be 84 %.

Embodiment 2

[0028] A certain amount of dibenzothiophene (DBT) was weighed and dissolved in n-octane to prepare a simulated oil with a sulfur content of 500ppm. Weigh 10 mL of simulated oil and 8 mL of choline chloride / oxalic acid deep eutectic solvent into a 50 mL Erlenmeyer flask, add 0.2 mL of H 2 o 2 . After stirring at 40°C for 180 min, the mixture was cooled to room temperature, separated into layers in a separatory funnel, and the sample in the upper oil phase was drawn, and the sulfur content was measured with a WK-2D microcoulomb comprehensive analyzer and the desulfurization rate was calculated to be 92 %.

Embodiment 3

[0030] A certain amount of dibenzothiophene (DBT) was weighed and dissolved in n-octane to prepare a simulated oil with a sulfur content of 500ppm. Weigh 10 mL of simulated oil and 8 mL of choline chloride / oxalic acid deep eutectic solvent into a 50 mL Erlenmeyer flask, add 0.3 mL of H 2 o 2 . After stirring at 40°C for 180 min, the mixture was cooled to room temperature, separated into layers in a separatory funnel, and the sample in the upper oil phase was drawn, and the sulfur content was measured with a WK-2D microcoulomb comprehensive analyzer and the desulfurization rate was calculated to be 93 %.

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Abstract

The invention belongs to the field of oil product sulfide removal, and in particular relates to a method for removing sulfide from an oil product by using a choline chloride / oxalic acid type eutectic solvent by virtue of an oxidation-extraction integrated process. The method is implemented according to the following steps: (1) synthesis of the choline chloride / oxalic acid eutectic solvent: weighing choline chloride and oxalic acid, and stirring until a transparent solution is formed to obtain the choline chloride / oxalic acid eutectic solvent; (2) a desulfurization process: weighing dibenzothiophene, and dissolving into normal octane to prepare simulated oil; weighing the simulated oil and the choline chloride / oxalic acid eutectic solvent; adding hydrogen peroxide, stirring, and cooling to room temperature; performing static lamination in a separating funnel, and absorbing a sample in an upper-layer oil phase; and measuring the sulfur content, and calculating the desulfurization rate. According to the method disclosed by the invention, in the preparation process, an adopted catalyst serves as both the catalyst and an extraction agent, thus the production cost is reduced, and the desulfurization process is simplified.

Description

technical field [0001] The invention belongs to the field of oil sulfide removal, and in particular relates to a method for removing sulfide in oil by adopting a choline chloride / oxalic acid type deep eutectic solvent oxidation-extraction integrated method. Background technique [0002] With the rapid development of the automobile industry, the pollution of sulfur compounds produced by the combustion of vehicle fuels is becoming more and more serious. Countries and regions around the world have successively formulated strict standards for the sulfur content of gasoline and diesel [YAZU K, YAMAMOTO Y, FURUYA T, MIKI K, UKEGAWA K. Oxidation of Dibenzothiophenes in an Organic Biphasic System and Its Application to Oxidative Desulfurization of Light Oil [J] Energy Fuels, 2001, 15: 1535-1536. ]. In industry, hydrodesulfurization (HDS) is usually used to remove sulfide in gasoline and diesel, but for thiophene and its derivatives, due to the steric hindrance effect, the desulfur...

Claims

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Application Information

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IPC IPC(8): C10G27/12C10G21/27
Inventor 赵荣祥李秀萍李佳慧胡嘉
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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