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A method for oxidative desulfurization of catalytic fuel oil using multi-acid intercalation trimethylol hydrotalcite and ionic liquid extraction

A technology of trimethylol hydrotalcite and trimethylol water, applied in chemical instruments and methods, petroleum industry, physical/chemical process catalysts, etc., can solve the problem of increasing equipment investment and operating costs, and reducing the octane number of oil products. , and no large-scale promotion, etc., to achieve the effects of easy recycling, short response time, and accurate detection methods

Active Publication Date: 2017-01-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is raw material hydrogenation or selective hydroprocessing technology, what they have in common is the need for high temperature and high pressure, hydrogen consumption, and lower octane number of oil products
Although selective hydrogenation has made many improvements in catalyst selection and process flow, it has avoided a large amount of hydrogen consumption and reduced octane loss, but it has increased equipment investment and operating costs, and this technology has not been widely promoted.

Method used

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  • A method for oxidative desulfurization of catalytic fuel oil using multi-acid intercalation trimethylol hydrotalcite and ionic liquid extraction
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  • A method for oxidative desulfurization of catalytic fuel oil using multi-acid intercalation trimethylol hydrotalcite and ionic liquid extraction

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Experimental program
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Effect test

Embodiment 1

[0027] 1. Preparation of simulated fuel oil: 1.4662 g (7.793 mmol, 98%) of DBT was dissolved in n-octane to prepare 250 mL of simulated fuel oil with a sulfur content of 1000 ppm.

[0028] 2. Tris-NH 2 -PW 12 -The preparation method of LDH: 1), prepare the mixed solution of magnesium chloride, aluminum chloride and tris (hydroxymethyl) aminomethane, hydrothermal reaction 15 hours under 50 ℃; Gained precipitation 2g is dispersed in 100mL concentration and is the Na 2 CO 3 After ion exchange in the solution for 2 hours, centrifuge, wash and dry to obtain Tris-NH 2 -CO 3 -LDH; the mol ratio of magnesium chloride and aluminum chloride is 3:1, the concentration of magnesium chloride is 10mM, and the concentration of tris(hydroxymethyl)aminomethane is 0.1M;

[0029] 2). Prepare Na with a concentration of 0.1M 3 [PW 12 o 40 ]·15H 2 O solution, then Tris-NH 2 -CO 3 -LDH 20mg added to 25mLNa 3 [PW 12 o 40 ]·15H 2 In O solution, Na 3 [PW 12 o 40 ]·15H 2 O and Tris-NH ...

Embodiment 2

[0034] 1. The preparation of simulated fuel oil: with embodiment 1.

[0035] 2. Tris-CH 3 -SiW 12 -The preparation method of LDH: 1), prepare the mixed solution of magnesium chloride, aluminum chloride and trimethylolethane, hydrothermal reaction 5 hours under 150 ℃; 2 CO 3 After ion exchange in the solution for 1 hour, centrifuge, wash and dry to obtain Tris-CH 3 -CO 3 -LDH; the molar ratio of magnesium chloride to aluminum chloride is 2:1, the concentration of magnesium chloride is 50mM, and the concentration of trimethylolethane is 3M;

[0036] 2). Prepare Na with a concentration of 10M 3 [SiW 12 o 40 ]·15H 2 O solution, then Tris-CH 3 -CO 3 -LDH 50mg added to 25mLNa 3 [SiW 12 o 40 ]·15H 2 In O solution, Na 3 [SiW 12 o 40 ]·15H 2 O and Tris-CH 3 -CO 3 The molar ratio of -LDH is 3, after stirring for 2 hours without nitrogen protection, it is centrifuged and washed, and dried in vacuum to obtain Tris-CH 3 -SiW 12 -LDH.

[0037] 3 Catalytic oxidation de...

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Abstract

The invention discloses a method for oxidative desulfurization of fuel oil by adopting polyacid intercalation trihydroxymethyl hydrotalcite and ionic liquid extraction catalysis. According to the method, high-sulfur fuel oil is subjected to catalytic oxidation in a catalytic system with combined use of polyacid intercalation trihydroxymethyl hydrotalcite, ionic liquid and oxydol, an effect of deep desulfurization is achieved under a mild condition, and efficient and clean utilization of an energy source is realized. The trihydroxymethyl hydrotalcite is used as a carrier, and the catalytic performance of polyacid can be greatly improved by using the characteristics of large surface area and limited range space of the carrier; a polyacid intercalation hydrotalcite composite material of the type not only has functional characteristics of anionic clay and polyacid ions, but also has a practical significance for solving the problem of immobilization of heteropolyacid during industrial catalysis; and meanwhile, the intercalation hydrotalcite composite material has a meso-microporous structure, and is very suitable for selective catalytic reaction. Moreover, a catalyst and the ionic liquid cannot be degraded after multiple times of cyclic reaction, so that the method is a relatively successful desulfurization method.

Description

technical field [0001] The invention belongs to the technical field of catalytic oxidation desulfurization of fuel oil, in particular to a method for extracting and catalytic fuel oil oxidation desulfurization by using multi-acid intercalation trimethylol hydrotalcite and ionic liquid. Background technique [0002] Sulfur in crude oil and petroleum fractions exists in the form of elemental sulfur, hydrogen sulfide, and organic sulfides. Organic sulfur compounds can generally be divided into mercaptans, sulfides, disulfides and thiophenes. These sulfur-containing substances are distributed in various distillates during crude oil processing. The sulfur-containing compounds in gasoline are mainly mercaptans, sulfides and monocyclic thiophenes, which mainly come from FCC gasoline. The sulfur-containing compounds in the diesel fraction include mercaptan, sulfide, thiophene, benzothiophene and dibenzothiophene, etc., where there are alkyl groups at the 4-position and 6-position o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G27/00B01J31/26
Inventor 宋宇飞陈阳
Owner BEIJING UNIV OF CHEM TECH
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