Preparation method and application of a gasoline sweetening adsorbent

A technology for desulfurization and adsorbent, which is applied in the field of preparation of new gasoline desulfurization adsorbent, can solve problems such as unsatisfactory effect, and achieves the effects of easy regeneration, solving the problem of agglomeration and less environmental harm

Active Publication Date: 2014-10-15
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Zeolite imidazole framework material (ZIFs for short) is a new type of material, which has the advantages of structural diversity, high specific surface area, high thermal and chemical stability, and good adsorption performance. Incomparable performance of other materials, but zeolite imidazole framework materials (ZIFs) nanocrystals are easy to form agglomeration, and the effect of direct use in adsorption desulfurization reaction is not ideal

Method used

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  • Preparation method and application of a gasoline sweetening adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a gasoline sweetening sorbent, which is prepared through the following steps:

[0035]Weigh 1.1g of zinc acetate and dissolve it in 80mL of deionized water, add 0.5g of COOH-SBA-15, ultrasonically disperse for 0.5h, then add 4.1g of 2-methylimidazole, mix well, stir and age in a water bath at 40°C for 1h, turn to Put it into a polytetrafluoroethylene-lined reactor, crystallize at 140°C for 24 hours, suction filter, wash, and dry to obtain a ZIF-8 / SBA-15 complex; wherein, the synthesis process of COOH-SBA-15 is as follows: Weigh 2.0g SBA-15 and disperse it in 120mL toluene, add 5.0mL trialkoxycyanoethylsilane, reflux at 100°C for 12h, cool to room temperature, suction filter, wash with ethanol, and vacuum dry to obtain CN-SBA-15, then Weigh 1.0g CN-SBA-15 in 150mL of 48wt% H 2 8O 4 In the solution, reflux at 100°C for 4 hours, wash with deionized water until neutral, and dry to obtain the modified SBA-15, namely COOH-SBA-15;

[0036] The ZIF-8...

Embodiment 2

[0039] This embodiment provides a gasoline sweetening sorbent, which is prepared through the following steps:

[0040] Mix 50mL N,N-dimethylformamide (DMF) with 0.7g zinc nitrate, add 0.5g COOH-SBA-15 (the synthesis process is the same as in Example 1), ultrasonically disperse for 0.5h, then add 0.5g imidazole and 0.2g Mix 2-nitroimidazole evenly, stir and age at 40°C for 1h, transfer it to a polytetrafluoroethylene-lined reactor, conduct solvothermal crystallization at 100°C for 72h, filter the crystallized product, and wash , vacuum dried to obtain ZIF-68 / SBA-15;

[0041] The ZIF-68 / SBA-15 composite was tableted, crushed and sieved to obtain particles with a particle size of 20-40 mesh, and dried at 120°C to finally obtain a gasoline sweetening adsorbent, which was designated as Cat-3.

[0042] Activity Evaluation of Adsorbent for Sweetening Gasoline

[0043] The gasoline sweetening adsorbents prepared in Comparative Example 1, Example 1 and Example 2 were evaluated for ga...

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Abstract

The invention relates to a preparation method for a novel gasoline sweetening adsorbent and an application of the novel gasoline sweetening adsorbent. The preparation method for the novel gasoline sweetening adsorbent comprises the following steps of: evenly mixing a solvent, a metal ion precursor with a mesoporous material; ageing; adding an organic ligand; performing hydrothermal crystallization treatment; then, performing suction filtration, washing and drying on a product produced after the hydrothermal crystallization treatment to obtain a zeolite imidazole framework material / mesoporous material compound; and performing preforming shaping and crushing screening on the zeolite imidazole framework material / mesoporous material compound to obtain the gasoline sweetening adsorbent. According to the zeolite imidazole framework material / mesoporous material compound provided by the invention, the specific surface area of a zeolite imidazole framework material is high, and meanwhile, zeolite imidazole framework material is highly dispersed on the mesoporous material, and thereby, the problem of diffusional limitation caused by agglomeration is effectively solved.

Description

technical field [0001] The invention relates to a preparation method and application of a novel gasoline sweetening adsorbent, belonging to the technical field of petroleum catalyst preparation. Background technique [0002] With the increasingly stringent environmental protection regulations, the demand for the production of clean fuels is becoming increasingly urgent. Due to the existence of a certain amount of mercaptans, light oil products such as gasoline have a foul smell. At the same time, mercaptans can promote the oxidation of unstable components in oil products, making their stability worse. In addition, when sulfur-containing substances burn at high temperatures Strong corrosive sulfur oxides are generated, which are discharged into the atmosphere to form acid rain and damage the ecological environment. Therefore, it is necessary to remove mercaptans in light oil products. [0003] The traditional method of removing mercaptans is alkali washing, but due to the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C10G25/00
Inventor 范煜吴莉芳王世华李国旗石冈鲍晓军刘海燕
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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