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Magnetic adsorbent, preparation method and application of magnetic adsorbent in desulfurization of fuel oil

A magnetic adsorbent and fuel oil technology, applied in refined hydrocarbon oil, chemical instruments and methods, petroleum industry, etc., can solve problems such as difficult separation of adsorbents, achieve ideal results, high recovery and regeneration rates, and overcome separation steps More effects

Active Publication Date: 2013-10-02
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to overcome the problem of difficult separation of adsorbents, and to provide a magnetic adsorbent, which has low operating cost, good adsorption effect, easy regeneration, and reduced loss of adsorbent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 2.6g of anhydrous ferric trichloride, 1.0g of anhydrous sodium citrate and 4.0g of anhydrous sodium acetate, mix and dissolve them in ethylene glycol, stir for 1h, then transfer them to an autoclave at 200°C for 10h, and the obtained ferric oxide Nanoparticles were washed three times with ethanol and water, respectively. Weigh 0.1g of iron ferric oxide particles with a size of about 300nm and uniformly disperse them in a mixed solution of 60ml of ethanol, 80ml of deionized water, 1.00g of concentrated ammonia water (28wt%) and 0.30g of CTAB, stir for 15min, then quickly drop 0.10g TEOS, the magnetic Fe3O4 / surfactant-containing silica composite microspheres were obtained after ultrasonic reaction for 2 hours, recovered by a magnet, and washed three times with ethanol and water respectively. The silicon layer thickness of the obtained composite microspheres was 35 nm.

Embodiment 2

[0030] Weigh 2.6g of anhydrous ferric trichloride, 1.0g of anhydrous sodium citrate and 4.0g of anhydrous sodium acetate, mix and dissolve them in ethylene glycol, stir for 1 hour, then transfer them to an autoclave at 200°C for 10 hours, and the obtained ferric oxide Nanoparticles were washed three times with ethanol and water, respectively. Weigh 0.1g of iron ferric oxide particles with a size of about 300nm and uniformly disperse them in a mixed solution of 60ml of ethanol, 80ml of deionized water, 1.00g of concentrated ammonia water (28wt%) and 0.30g of CTAB, stir for 15min, and quickly add 0.20g of TEOS, the magnetic Fe3O4 / surfactant-containing silica composite microspheres were obtained after ultrasonic reaction for 2 hours, recovered by a magnet, and washed three times with ethanol and water respectively.

[0031] The thickness of the silicon layer of the obtained composite microspheres was 70 nm.

Embodiment 3

[0033] Weigh 2.6g of anhydrous ferric trichloride, 1.0g of anhydrous sodium citrate and 4.0g of anhydrous sodium acetate, mix and dissolve them in ethylene glycol, stir for 1 hour, then transfer them to an autoclave at 200°C for 10 hours, and the obtained ferric oxide Nanoparticles were washed three times with ethanol and water, respectively. Weigh 0.1g of iron ferric oxide particles with a size of about 300nm and uniformly disperse them in a mixed solution of 60ml of ethanol, 80ml of deionized water, 1.00g of concentrated ammonia water (28wt%) and 0.30g of CTAB, stir for 15min, then quickly add 0.30g of TEOS, the magnetic Fe3O4 / surfactant-containing silica composite microspheres were obtained after ultrasonic reaction for 2 hours, recovered by a magnet, and washed three times with ethanol and water respectively.

[0034] The thickness of the silicon layer of the obtained composite microspheres was 90 nm.

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Abstract

The invention discloses a magnetic adsorbent, a preparation method and an application of the magnetic adsorbent in desulfurization of fuel oil. The adsorbent is low in operation cost, good in adsorption effect and easy to regenerate, and the loss of the adsorbent is reduced. The magnetic adsorbent comprises a carrier and an adsorption ingredient, wherein the carrier is a core-shell composite microsphere; an inner core of the core-shell composite microsphere is made of ferroferric oxide; a shell is made of porous silicon dioxide; the size of the core-shell composite microsphere is 400-1000nm; the specific surface of the core-shell composite microsphere is 1000m<2> / g; the pore volume of the core-shell composite microsphere is 0.2-0.8cm<3> / g; the mesoporous diameter is 2-6nm; the adsorption ingredient is one or more of silver nitrate, silver fluoride and silver perchlorate; and the mole ratio of silver to silicon in the shell is 0.018-0.13.

Description

technical field [0001] The invention relates to an adsorbent, a preparation method and its application, more specifically to a magnetic adsorbent, a preparation method and its application in fuel oil desulfurization, and belongs to the field of chemical separation. Background technique [0002] Mercaptans, sulfides, sulfur oxides and thiophene sulfides contained in fuel oil (gasoline, diesel and kerosene, etc.) are one of the main factors leading to environmental pollution. These sulfides will generate toxic sulfur oxides with the combustion of fuel oil, pollute the air, and can further generate acid rain, corrode buildings, and cause great harm. Countries around the world have higher and higher requirements for fuel oil quality, so fuel Deep desulfurization of oil has become an important and urgent problem to be solved. On the one hand, the traditional hydrodesulfurization technology has high reaction temperature and pressure, high energy consumption, and reduces the octan...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C10G25/00
Inventor 刘晓勤孙林兵谈朋刘定华
Owner NANJING UNIV OF TECH
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