Preparation method of catalytically cracked gasoline hydrodesulfurization catalyst containing nanocrystalline multi-stage duct ZSM-5 molecular sieve

A technology for catalytically cracking gasoline, ZSM-5, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of high dispersion of metal active components, desulfurization The efficiency needs to be improved, the specific surface area of ​​the catalyst is large, etc., to achieve the effect of good hydrothermal stability, excellent ion exchange performance, and rich surface properties

Active Publication Date: 2015-04-29
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] CN2005102000948 reports a catalyst prepared by a composite molecular sieve mechanically mixed with mesoporous molecular sieves and microporous molecular sieves. The catalyst has hydrodesulfurization and hydrocracking activities, but the activity and selectivity are not high
[0007] CN103349995A discloses a hydrodesulfurization catalyst prepared with a mesoporous composite molecular sieve ZSM-5 / KIT-1 as a carrier. The catalyst has a large specific surface area, rich pores, high dispersion of metal active components, and mild hydrodesulfurization reaction conditions , but its desulfurization efficiency needs to be improved
But there is no report on the use of mesoporous ZSM-5 molecular sieves as FCC gasoline hydrodesulfurization catalysts

Method used

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  • Preparation method of catalytically cracked gasoline hydrodesulfurization catalyst containing nanocrystalline multi-stage duct ZSM-5 molecular sieve
  • Preparation method of catalytically cracked gasoline hydrodesulfurization catalyst containing nanocrystalline multi-stage duct ZSM-5 molecular sieve
  • Preparation method of catalytically cracked gasoline hydrodesulfurization catalyst containing nanocrystalline multi-stage duct ZSM-5 molecular sieve

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Embodiment 1

[0030] (1) Preparation of nanocrystalline NCMZ molecular sieves: According to literature (Nature.2009, 461:246-9), nanocrystalline NCMZ molecular sieves were synthesized: 2.37g of sodium hydroxide was dissolved in 61.26g of water, and stirred evenly. Weigh 7.62g C 34 h 74 Br 2 N 2 Add it into the sodium hydroxide solution, continue to stir for 2h, and dissolve 0.98g of octadecadecahydrate aluminum sulfate in 12.8g of sulfuric acid (mass fraction ω=20%), and after stirring for 1h, mix the above two solutions and move to 60 Stir in a water bath for 1 h. Weigh 30.2g of tetraethyl orthosilicate, add it dropwise into the mixed solution, stir for 2 hours, and form a synthetic gel. Move the synthetic rubber to a crystallization kettle with a polytetrafluoroethylene liner, crystallize at 150°C for 5 days, filter, wash, and dry at 110°C for 10 hours, then bake it in an air atmosphere at 550°C for 6 hours to remove the template agent, namely The properties of the nanocrystalline NC...

Embodiment 2

[0034] (1) Preparation of nanocrystalline NCMZ molecular sieve: According to literature (Nature.2009, 461:246-9), nanocrystalline NCMZ molecular sieve was synthesized: 4.74g of sodium hydroxide was dissolved in 122.4g of water, and stirred evenly. Weigh 15.24g C 34 h 74 Br 2 N 2 Add it into the sodium hydroxide solution, continue to stir for 1 h, and dissolve 1.96 g of aluminum sulfate octadecahydrate in 25.6 g of sulfuric acid (mass fraction ω=20%), and after stirring for 0.5 h, mix the above two solutions and move to Stir in a water bath at 60°C for 1h. Weigh 60.4g of tetraethyl orthosilicate, add it dropwise into the mixed solution, and stir for 1 hour to form a synthetic gel. Move the synthetic rubber to a crystallization kettle with a polytetrafluoroethylene liner, crystallize at 150°C for 5 days, filter, wash, and dry at 110°C. After 6h, bake it in an air atmosphere at 550°C for 6h to remove the template. That is, the nanocrystalline-based NCMZ molecular sieve is ob...

Embodiment 3

[0038] (1) Preparation of nanocrystalline NCMZ molecular sieve: According to literature (Nature.2009, 461:246-9), nanocrystalline NCMZ molecular sieve was synthesized: 1.185g of sodium hydroxide was dissolved in 30.63g of water, and stirred evenly. Weigh 3.81g C 34 h 74 Br 2 N 2 Add it into the sodium hydroxide solution, continue to stir for 2h, and dissolve 0.49g of octadecadecahydrate aluminum sulfate in 6.4g of sulfuric acid (mass fraction ω=20%). After stirring for 1h, mix the above two solutions and move to 60 Stir in a water bath for 1 h. Weigh 15.1g of tetraethyl orthosilicate, add it dropwise into the mixed solution, stir for 2 hours, and form a synthetic gel. Move the synthetic glue to a crystallization kettle with a polytetrafluoroethylene liner, crystallize at 150°C for 5 days, filter, wash, and dry at 110°C. After 10 hours, bake it in an air atmosphere at 550°C for 6 hours to remove the template. The obtained nanocrystalline NCMZ molecular sieve;

[0039] (2)...

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Abstract

The invention relates to a preparation method of a catalytically cracked gasoline hydrodesulfurization catalyst containing a nanocrystalline multi-stage duct ZSM-5 molecular sieve. The catalytically cracked gasoline hydrodesulfurization catalyst mainly consists of the following components in percentage by weight: 5-30% of active components, 4-9% of an active component auxiliary, 1-5% of a modifying agent and 60-90% of carriers, wherein the active components comprise at least one of Mo and W metal elements; the active component auxiliary comprise at least one of Co and Ni elements; the modifying agent is one of metals La and Ce, or the compounding of the metal La and Ce; the carriers are composite carriers using aluminum oxide and an NCMZ molecular sieve as main bodies. According to the invention, through the unique framework and duct structure of the NCMZ molecular sieve, the advantages of a micropore ZSM-5 molecular sieve and the advantages of mesoporous materials are combined, so that the reaction efficiency is further improved, and increasing product quality is finally realized. The FCC gasoline hydrodesulfurization catalyst disclosed by the invention can enable a reaction to be carried out under more moderate conditions.

Description

technical field [0001] The invention relates to a catalytic cracking (FCC) gasoline hydrogenation desulfurization catalyst and a preparation method thereof. Background technique [0002] With the continuous enhancement of people's awareness of environmental protection, the pollution caused by automobile exhaust has become the focus of people's attention. Sulfur in fuel oil products (especially vehicle fuel oil) is one of the important causes of urban pollution. In order to control the air pollution caused by vehicle exhaust emissions, people have done a lot of work on the low-sulfurization of fuel oil products. Governments around the world are increasingly aware of the importance of deep desulfurization of fuel oil. Developed countries such as Europe and the United States have successively promulgated a The new standards for the cleanliness of a series of petroleum products, the limitation of sulfur content is one of the important contents. In the total domestic gasoline, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34C10G45/12
Inventor 霍全陈培培郉文涛刘冬王博陈文成
Owner YANSHAN UNIV
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