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Method for removing dibenzothiophene in gasoline by oxidation/extraction

A technology for removing dibenzothiophene, which is applied in the treatment of hydrocarbon oil, petroleum industry, refined hydrocarbon oil, etc., can solve the problems of low desulfurization rate, non-recyclable use, environmental pollution of organic extractant, etc., and achieves high desulfurization rate, The effect of short time and easy operation

Inactive Publication Date: 2016-06-22
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of environmental pollution, non-recyclable use, and low desulfurization rate of organic extractants in oxidation / extraction desulfurization, the present invention uses an ionic liquid with high-efficiency extraction performance to extract the generated oxidation products from the fuel oil phase to the ionic liquid phase in time. At the same time, it promotes the efficient separation of fuel oil and oxidation products and the completion of oxidation desulfurization reaction to achieve the purpose of deep desulfurization of fuel oil, and realizes the reaction-separation integration of fuel oil oxidation desulfurization process and the recovery and recycling of the catalytic system

Method used

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  • Method for removing dibenzothiophene in gasoline by oxidation/extraction
  • Method for removing dibenzothiophene in gasoline by oxidation/extraction
  • Method for removing dibenzothiophene in gasoline by oxidation/extraction

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Get 10mL of simulated oil containing dibenzothiophene (DBT) in a 50mL flask, add 0.5g of ionic liquid (R=C 8 h 17 ), 0.5mL30%H 2 o 2 and 0.5mLCH 3 COOH, keep a certain stirring rate, react at 70°C for 2 hours, after the reaction, let it stand for stratification, take an appropriate amount of upper layer oil, measure its sulfur content with a WK-2D microcoulomb comprehensive analyzer, and the desulfurization rate is 99.2 %.

Embodiment 2

[0022] Get 10mL of simulated oil containing DBT in a 50mL flask, add 0.65g of ionic liquid (R=C 8 h 17 ), 0.5mL30%H 2 o 2 and 0.5mLCH 3 COOH, keep a certain stirring rate, react at 70°C for 2 hours, after the reaction, let it stand for stratification, take an appropriate amount of upper layer oil, measure its sulfur content with a WK-2D microcoulomb comprehensive analyzer, and the desulfurization rate is 99.5 %.

Embodiment 3

[0024] Get 10mL of simulated oil containing DBT in a 50mL flask, add 0.8g of ionic liquid (R=C 8 h 17 ), 0.5mL30%H 2 o 2 and 0.5mLCH 3 COOH, keep a certain stirring rate, react at 70°C for 2 hours, after the reaction, let it stand for stratification, take an appropriate amount of upper layer oil, measure its sulfur content with a WK-2D microcoulomb comprehensive analyzer, and the desulfurization rate is 99.3 %.

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Abstract

The invention relates to a method for removing dibenzothiophene in gasoline by an oxidation / extraction coupling technique. The method is characterized in that the coupling of oxidation reaction and extraction desulfurization is carried out in one system by using H2O2 as an oxidizer, CH3COOH as a catalyst and an ionic liquid as an extractant. The ionic liquid extractant is structurally characterized by using hydroxyl imidazole compounds as a cation framework and p-methylbenzenesulfonate as anions. The ionic liquid has favorable extractibility for sulfone and sulfoxide under multiple interactions with the oxidation product sulfone and sulfoxide, thereby implementing deep removal of thiophene sulfides. After the extraction desulfurization is finished, simple phase separation is performed to recycle the ionic liquid extractant.

Description

technical field [0001] The invention relates to the technical field of refining oil products in the petrochemical industry, in particular to a method for removing dibenzothiophene from gasoline using an oxidation coupling extraction technology based on an ionic liquid extractant. Background technique [0002] In order to reduce the environmental pollution caused by vehicle exhaust, countries around the world have promulgated increasingly stringent environmental regulations to reduce the sulfur content in gasoline. At present, developed countries in Europe and the United States have reduced the sulfur content in gasoline to 10ppm, while my country can only achieve the standard of 50ppm, and the sulfur content is 5 times that of developed countries. In order to improve the international competitiveness of my country's oil products, fully integrate the sulfur content of oil products with international standards, and move towards "sulfur-free gasoline", it is urgent to carry out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G21/20
CPCC10G21/20C10G2400/02
Inventor 于凤丽解从霞袁冰于世涛谢盼辉
Owner QINGDAO UNIV OF SCI & TECH