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Preparation and application of a molecular sieve gasoline desulfurizer loaded with functionalized ionic liquid

An ionic liquid and functionalized technology, applied in the field of oil processing, can solve the problems of increased equipment investment and operating costs, decreased fuel oil octane number, increased reactor volume, etc., and achieves improved catalytic oxidation efficiency and convenient regeneration. , Improve the effect of dispersion effect

Active Publication Date: 2018-06-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, some aromatic hydrocarbon sulfur compounds (benzothiophene, dibenzothiophene, 4,6-dimethyldibenzothiophene) commonly exist in gasoline, and the hydrogenation rate constant is extremely high due to their steric hindrance effect and electronic factors. Low factors make it difficult to remove it by hydrodesulfurization technology, which is widely used in traditional industries. In order to achieve a higher quality standard of sulfur content, deep hydrogenation is necessary, which will lead to a decrease in the octane number of fuel oil , hydrogen consumption increases, reactor volume increases, equipment investment and operating costs increase sharply

Method used

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  • Preparation and application of a molecular sieve gasoline desulfurizer loaded with functionalized ionic liquid
  • Preparation and application of a molecular sieve gasoline desulfurizer loaded with functionalized ionic liquid

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Embodiment 1

[0035] A preparation method of a molecular sieve gasoline desulfurizer loaded with functionalized ionic liquid, comprising the following steps:

[0036] (1) Add 0.10mol N-methylimidazole to 30mL ethanol, under vigorous stirring, add 12g SBA-15 molecular sieve, stir at room temperature for 10h, make N-methylimidazole fully dispersed in the molecular sieve, and then add Add ethanol solution dissolved with 0.11mol chloroacetic acid, stir and react at 50°C for 24 hours, filter with suction, wash with ethanol for 3 times, remove unreacted N-methylimidazole, chloroacetic acid, and the two that are only attached to the molecular sieve surface The reaction product is fully washed and removed to obtain a white solid crude product, which is SBA-15 molecular sieve loaded with 1-acetic acid-3-methylimidazolium chloride salt;

[0037] (2) The white solid crude product obtained in step (1) was stirred and dispersed in 30 mL of dichloromethane, and then an appropriate amount of sulfuric acid...

Embodiment 2

[0041] A preparation method of a molecular sieve gasoline desulfurizer loaded with functionalized ionic liquid, comprising the following steps:

[0042] (1) Add 0.12 mol of pyridine to 30 mL of ethanol, add 15 g of NaY molecular sieve under vigorous stirring, and stir at room temperature for 12 hours to fully disperse pyridine in the molecular sieve, then add 0.13 mol of 4-bromobutyric acid of ethanol solution, stirred and reacted at 55°C for 22h, suction filtered, washed 3 times with ethanol, fully washed and removed the unreacted pyridine, 4-bromobutyric acid, and the reaction products of the two that were only attached to the surface of NaY molecular sieve, and obtained The white solid crude product is NaY loaded with 1-butyric acid pyridinium bromide;

[0043] (2) Stir and disperse the white solid crude product obtained in step (1) in 40mL of dichloromethane, then add an appropriate amount of sulfuric acid dropwise, and react under reflux and stirring for 30h at 50°C; Suc...

Embodiment 3

[0047] A preparation method of a molecular sieve gasoline desulfurizer loaded with functionalized ionic liquid, comprising the following steps:

[0048] (1) Add 0.10mol of dodecyltrimethylammonium bromide to 30mL of ethanol, under vigorous stirring, add 16g of MCM-41 molecular sieve, and stir at room temperature for 10h to make the dodecyltrimethylammonium bromide solution After the molecular sieve is fully dispersed, filter with suction and wash with ethanol for 3 times, fully wash and remove the dodecyltrimethylammonium bromide that is only attached to the surface of the MCM-41 molecular sieve, and obtain a white solid crude product, which is the product loaded with ten Dialkyltrimethylammonium bromide MCM-41;

[0049] (2) Stir and disperse the white solid crude product obtained in step (1) in 50 mL of dichloromethane, then add an appropriate amount of phosphoric acid dropwise, and react under reflux and stirring for 36 h at 50° C. After the reaction, the reaction solution ...

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Abstract

The invention discloses preparation and applications of a molecular sieve gasoline desulfurizing agent loaded with a functionalized ionic liquid. According to a preparation method, the functionalized ionic liquid is anchored or restricted in a molecular sieve via in situ synthesis so as to obtain the molecular sieve gasoline desulfurizing agent loaded with the functionalized ionic liquid, and load capacity of the functionalized ionic liquid on the molecular sieve ranges from 5 to 30%. Introduction of acidic functional groups into the ionic liquid is capable of achieving synergist effect of adsorption of the molecular sieve in gasoline desulphurization; acidic active sites are capable of catalyzing oxidation sulfone forming reaction of a plurality of thiophenic sulfides effectively, and possess excellent promoting effect on subsequent extraction desulphurization. Reaction conditions are mild; operation cost is low; removing effect is excellent; oil product loss and oil product quality decrease caused in desulphurization process are avoided effectively; desulfurizing agent regeneration is convenient to realize; and recycling effect is excellent.

Description

technical field [0001] The invention belongs to the technical field of oil product processing, and in particular relates to the preparation and application of a molecular sieve gasoline desulfurizer loaded with functionalized ionic liquid. Background technique [0002] As we all know, the presence of sulfide in gasoline can cause great harm, such as reducing the quality of gasoline and corroding the engine. Sulfur in gasoline produces sulfur oxides (SO X ), the most important of which is sulfur dioxide (SO 2 ) is the direct cause of acid rain. According to statistics, there are about 25Mt of SO in my country every year 2 Exhausted into the atmosphere, studies have shown that children, the elderly and some people with asthma are exposed to high concentrations of SO for a long time 2 , will cause an increase in the incidence of respiratory diseases; and about 30% of SO 2 It is converted into sulfate aerosol in the atmosphere, and its stimulating effect is about doubled. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/18C10G25/00C10G27/04C10G29/02
CPCB01J20/183B01J20/3085C10G25/05C10G27/04C10G29/02C10G2300/1037C10G2300/202C10G2400/02
Inventor 于英豪郭海洋袁媛石卓王乐夫李雪辉
Owner SOUTH CHINA UNIV OF TECH