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A kind of preparation method of magnetic composite SBA-15 adsorbent for fuel oil desulfurization

An adsorbent and fuel oil technology, applied in chemical instruments and methods, refining hydrocarbon oil, treating hydrocarbon oil, etc., can solve the problems of cumbersome process and too many solvents, improve adsorption performance, increase acidity, and realize adsorption selectivity Effect

Active Publication Date: 2020-09-11
扬州石化有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large number of adsorbents containing active components such as Cu, Ag, and Ce have been reported, but the adsorption capacity and selectivity of the adsorbent still need to be further improved.
In addition, the separation and regeneration performance of the adsorbent also needs to be further improved. Imparting magnetism to the adsorbent is an effective method, but the preparation of the magnetic adsorbent currently requires many solvents and the process is cumbersome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] One, the preparation of adsorbent:

[0024] 1. Dissolve 6.4g of concentrated hydrochloric acid (36.0% by mass of HCl) in 68.0g of deionized water to prepare a hydrochloric acid aqueous solution with pH<2.0.

[0025] 2. Weigh 2.0 g template agent (P123) and add it to the 55.0 g hydrochloric acid aqueous solution prepared in the previous step, stir in a water bath at 35.0-40.0°C to fully dissolve P123, and form a mixed solution containing P123.

[0026] 3. Weigh 4.4 g TEOS and place it in the remaining hydrochloric acid aqueous solution, add 0.92 g cerium nitrate hexahydrate, 0.43 g aluminum isopropoxide, 0.85 g ferric nitrate nonahydrate (or 0.57 g ferric chloride hexahydrate), that is Si / The molar ratio of Ce is 10 / 1, and the molar ratio of Si / Al is 10 / 1. After prehydrolysis for 3.0 h in a water bath at 35.0-40.0°C, a mixed solution containing Si, Ce, Al, and Fe is formed.

[0027] 4. Slowly add the mixed solution containing Si, Ce, Al and Fe dropwise to the mixed so...

Embodiment 1

[0035] Dissolve 0.5 g of thiophene in 1.0 L of n-octane to prepare a simulated oil with a thiophene concentration of 500 mg / L.

[0036]Take 20.0 mL of the simulated gasoline, add 0.100 g Ce-Al-Fe / SBA-15 (10:10) adsorbent, stir at normal temperature and pressure for 2.0 h, and filter. The content of thiophene in the liquid phase product was measured by Fuli GC9790Ⅱ gas chromatograph, the content of thiophene decreased from 500 mg / L to 155 mg / L, and the desulfurization amount was 26.3 mg sulfur / g adsorbent.

Embodiment 2

[0038] Dissolve 0.5g of thiophene in 1.0L of n-octane to prepare simulated gasoline with a thiophene concentration of 500 mg / L.

[0039] Take 20.0 mL of the simulated gasoline, add 0.100 g Ce-Al-Fe / SBA-15 (5:10) adsorbent, stir for 2.0 h at normal temperature and pressure, and filter to obtain the liquid phase product.

[0040] The content of thiophene in the liquid phase product was measured by Fuli GC9790Ⅱ gas chromatograph, the content of thiophene decreased from 500 mg / L to 182 mg / L, and the desulfurization amount was 24.2 mg sulfur / g adsorbent.

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PUM

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Abstract

The invention provides a preparation method of a magnetic composite SBA-15 adsorbent for desulfurizing fuel oil and belongs to the technical field of chemical separation. The preparation method comprises the following steps: dissolving P123 into a hydrochloric acid solution to form a mixed solution containing a co-polymer; adding tetraethyl orthosilicate, Ce salt, Al salt and Fe salt into the hydrochloric acid solution respectively to from a mixed solution containing Si, Ce, Al and Fe ions; then mixing the two mixed solutions to form a crystallized solution; regulating the pH (Potential of Hydrogen) value of the crystallized solution to 4.0 to 7.0 through utilizing alkali liquid; then putting the crystallized solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining; crystallizing, filtering, carrying out water washing and drying to obtain SBA-15 molecular sieve raw powder loaded with Ce, Al and Fe; after roasting, reducing and then cooling to obtain the magnetic composite SBA-15 adsorbent which does not need surplus chemical reagents and can realize adsorption performance requirements of adsorption selectivity, adsorption capacity and easiness for separation.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and particularly relates to a preparation method of magnetic composite SBA-15 used as an adsorbent for removing thiophene sulfides in fuel oil. Background technique [0002] SO produced by combustion of sulfur compounds in fuel oil x It is one of the causes of environmental pollution, SO in automobile exhaust x In addition to causing smog, it will also cause acid rain, which will lead to corrosion of buildings, historical relics, and industrial equipment. At the same time, the high sulfur content in fuel oil will also lead to poisoning of the catalyst in the automobile exhaust purifier, reducing its activity or even deactivating it. In January 2017, my country supplied gasoline and diesel with National V standard nationwide, requiring the sulfur content to be less than 10ppm. The traditional hydrodesulfurization technology (HDS) has harsh operating conditions, and the steric hindra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/28C10G25/00B01J20/30
CPCB01J20/186B01J20/28009C10G25/003C10G2300/202
Inventor 姚日远孔黎明黄常青张丽丽王佩德
Owner 扬州石化有限责任公司
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