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Preparation method of hierarchical pore modified adsorbent for gasoline deep desulfurization

A deep desulfurization and multi-level pore technology, applied in chemical instruments and methods, refining hydrocarbon oil, treating hydrocarbon oil, etc., can solve the problems of weak sulfide selectivity, unstable mesopore structure, low specific surface area, etc., and achieve application Wide range, strong adsorption capacity, light color effect

Pending Publication Date: 2021-04-09
上海灿越化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the general alumina microspheres are mesoporous alumina microspheres, and the mesoporous channels are mostly worm-like and the pore walls are amorphous, resulting in unstable mesopore structure and low specific surface area, and weak selectivity to sulfide. Therefore, it is necessary to improve the adsorption performance by changing the pore structure and porosity of alumina microspheres, and further improve the adsorption performance of sulfide by modification methods.

Method used

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  • Preparation method of hierarchical pore modified adsorbent for gasoline deep desulfurization
  • Preparation method of hierarchical pore modified adsorbent for gasoline deep desulfurization
  • Preparation method of hierarchical pore modified adsorbent for gasoline deep desulfurization

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1: Deep adsorption desulfurization of sulfur-containing fuel in a chemical plant in Wuhan

[0040] Treatment object: sulfur-containing fuel oil from a chemical plant in Wuhan, with a sulfur content of 15ppm, in which thiophene sulfides account for about 60% of the sulfur content, and mercaptans and sulfides account for about 40% of the sulfur content.

[0041] The preparation of hierarchical porous modified adsorbent: utilize the method described in the present invention, take Al 2 (SO 4 ) 3 18H 2 O hydrated aluminum-containing salt 100g, add deionized water to prepare a solution, and carry out chemical reaction with 500g of sodium hydroxide to generate aluminum hydroxide precipitate; Aluminum hydroxide is added to the oxalic acid solution of 0.1mol / L with a mass ratio of 1:2, Stir well to obtain a suspension. After standing for 15 minutes, filter the suspension, wash the solid with deionized water, and obtain a desodiumized aluminum hydroxide solid; add 0.1...

Embodiment 2

[0043] Example 2: Deep desulfurization of sulfur-containing cracked gasoline produced by a petrochemical company in Shanghai

[0044] Treatment object: sulfur-containing cracked gasoline produced by a petrochemical company in Shanghai, the sulfur content is 16ppm, mercaptans, thioethers, and sulfides account for about 20% of the sulfur content, and thiophene sulfides account for about 80% of the sulfur content

[0045] The hierarchically porous modified adsorbent was prepared as described in Example 1.

[0046] Hierarchical porous modified adsorbent: for the treatment of sulfur-containing cracked gasoline, the aluminum hydroxide-based composite microspheres are calcined at a calcination temperature of 270 ° C. The mass ratio of polystyrene microspheres to colloidal sol is 1:15. The diameter is 6 μm.

[0047] Application effect: The multi-level porous modified adsorbent described in the present invention is used for desulfurization treatment of the company's sulfur-containing ...

Embodiment 3

[0048] Example 3: Adsorption desulfurization of sulfur-containing C4 hydrocarbon raw material produced by a certain petroleum factory in Yueyang City

[0049] Treatment object: Sulfur-containing carbon tetrahydrocarbon raw material of a petroleum plant in Yueyang City, the sulfur content is 16ppm, sulfides such as mercaptans, thioethers, and thioesters account for about 60% of the sulfur content, and sulfur dioxide accounts for about 40% of the sulfur content.

[0050] Hierarchical porous modified adsorbent: for sulfur-containing C4 hydrocarbon raw materials, the aluminum hydroxide-based composite microspheres are calcined at a calcination temperature of 300 ° C. The mass ratio of polystyrene microspheres to sol is 1:10. The diameter is 7.5 μm.

[0051] Application effect: The multi-level porous modified adsorbent described in the present invention is used in the company's sulfur-containing C4 hydrocarbon raw material for desulfurization treatment, the adsorption rate reaches ...

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Abstract

The invention relates to a preparation method of a hierarchical pore modified adsorbent for gasoline deep desulfurization. The preparation method comprises the following steps: reacting an Al2 (SO4) 3.18 H2O solution with sodium hydroxide to generate an aluminum hydroxide precipitate, adding an oxalic acid solution, filtering, and cleaning to obtain an aluminum hydroxide solid without sodium ions; adding diluted hydrochloric acid into the aluminum hydroxide solid, and adjusting the pH value to a proper value to obtain aluminum hydroxide sol; adding polystyrene microspheres into the aluminum hydroxide sol, and preparing porous alumina-based composite microspheres by using a spray drying method; and finally, dissolving and removing the polystyrene microspheres in the porous alumina-based composite microspheres by using a tetrahydrofuran solvent to obtain the hierarchical pore alumina microspheres with higher porosity. Potassium dichromate is used as a surface modifier, and the hierarchical pore alumina microspheres are modified by adopting an impregnation method, so that the hierarchical pore modified adsorbent can be obtained. According to the invention, sulfides in gasoline can be efficiently adsorbed and removed.

Description

technical field [0001] The invention relates to the technical field of adsorption desulfurization, in particular to a method for preparing a multi-level porous modified adsorbent used for gasoline deep desulfurization. Background technique [0002] With the development of science and technology, petrochemical, metallurgical engineering and other industrial fields have become an indispensable part of human society, and a large amount of sulfur-containing pollutants will be produced in the production process of oil and gas exploration, refining, chemical industry, metallurgy and other industries . For example, sulfide in sulfur-containing wastewater is toxic and corrosive, and sulfide is also one of the main causes of corrosion of equipment and pipelines. Therefore, on the premise of ensuring the quality of industrial products, the removal of sulfide has become the main research direction in the industrial field. The current desulfurization technologies mainly include hydrod...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/28B01J20/30C10G25/00
CPCB01J20/08B01J20/28021C10G25/003C10G2300/202C10G2400/02
Inventor 宋晓敏王春志
Owner 上海灿越化工科技有限公司