Core-shell USY@SBA-15 composite material as well as preparation method and application thereof

A composite material, core-shell technology, applied in chemical instruments and methods, hydrocarbon oil treatment, molecular sieve catalysts, etc., can solve the problem of difficulty in synthesizing core-shell USYSBA-15 composite materials, and shorten the hydrolysis time and shell layer. Controllable thickness and reduced assembly time

Inactive Publication Date: 2013-07-10
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, the sampling method of the CN101905170A invention patent is difficult to meet this requirement, and it is also

Method used

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  • Core-shell USY@SBA-15 composite material as well as preparation method and application thereof
  • Core-shell USY@SBA-15 composite material as well as preparation method and application thereof
  • Core-shell USY@SBA-15 composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1:

[0036] (1) Under stirring, add 6.0 g TEOS to 14.0 g pH=2.8 HCl solution. After stirring at room temperature for 6 hours, the solution changed from a turbid liquid to a clear solution. Let it stand for 24 hours and set aside.

[0037] (2) Dissolve 1.21g P123 surfactant in 130 g 0.4 mol / L hydrochloric acid solution, add 2.38 g ground USY molecular sieve, stir for 10 min, and then add the TEOS pre-hydrolyzed solution prepared in (1), 30 Stir at constant temperature for 4 h at ℃.

[0038] (3) Adjust the pH of the reaction solution to 4.0 with ammonia water. (2) Crystallize at 100°C for 24 hours, filter, wash, dry, and calcinate at 550°C for 6 hours to obtain a core-shell structure USYSBA-15 with a shell thickness of 80 nm. 80) Materials.

Example Embodiment

[0039] Example 2:

[0040] (1) Under stirring, add 6.0 g TEOS to 14.0 g HCl solution with pH=2.8. After stirring at room temperature for 6 hours, the solution turns from a turbid liquid to a clear solution. Let it stand for 24 hours for later use.

[0041] (2) Dissolve 1.21 g P123 surfactant in 130 g 0.4 mol / L hydrochloric acid solution, add 3.55 g ground USY molecular sieve, stir for 10 min, and then add the TEOS pre-hydrolyzed solution prepared in (1), 30 Stir at constant temperature for 4 h at ℃.

[0042] (3) Adjust the pH of the reaction solution to 4.0 with ammonia. (2) Crystallize at 100 ℃ for 24 h, filter, wash, dry, and calcinate at 550 ℃ for 6 h to obtain a core-shell structure USYSBA-15 with a shell thickness of 60 nm. (60) Materials.

Example Embodiment

[0043] Example 3:

[0044] (1) Under stirring, add 6.0 g TEOS to 14.0 g pH=2.8 HCl solution. After stirring at room temperature for 6 hours, the solution changed from a turbid liquid to a clear solution. Let it stand for 24 hours and set aside.

[0045] (2) Dissolve 1.21g P123 surfactant in 130 g 0.4 mol / L hydrochloric acid solution, add 4.76 g ground USY molecular sieve, stir for 10 min, and then add the TEOS pre-hydrolyzed solution prepared in (1), 30 Stir at constant temperature for 4 h at ℃.

[0046] (3) Adjust the pH of the reaction solution to 4.0 with ammonia water, crystallize at 100 ℃ for 24 h, filter, wash, dry, and calcinate at 550 ℃ for 6 h to obtain a core-shell structure USYSBA-15 with a shell thickness of 30 nm (30) Materials.

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Abstract

The invention belongs to the technical field of composite molecular sieve materials, and particularly relates to a core-shell USY@SBA-15 composite material as well as a preparation method and application thereof. An SBA-15 shell layer is assembled by silicon source hydrolysis and product crystallization in different acid media, and the hydrolysis time is shortened by means of silicon resource prehydrolysis, so that the problem that the acid property is affected due to the dealuminization of a USY molecular sieve in the assembly process is effectively avoided. An SBA-15 mesoporous material is prompted to be directionally assembled on the surface of the USY molecular sieve by adjusting the proportion between a silicon resource, a template, USY and H20, so as to form a regular and uniform mesoporous layer with controllable thickness, therefore, the SBA-15 mesoporous material is prevented from being separated from the USY molecular sieve, and the novel core-shell material compounded with a nanometer interface and having the characteristic of compounding the acid property and the aperture dual gradient is obtained ultimately. Compared with the USY molecular sieve, the core-shell USY@SBA-15 composite material serves as the carrier component of the hydroprocessing catalyst after the aluminum replenishment of the shell layer, thus remarkably promoting the activity and selectivity of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of composite molecular sieve materials, and in particular relates to an ultra-stable Y molecular sieve and mesoporous SBA-15 core-shell composite material, a preparation method thereof, and an application of an acidic composition in a hydrogenation catalyst. Background technique [0002] Ultrastable Y molecular sieve (USY) has been widely used in hydrocracking, hydrodesulfurization and hydrodenitrogenation and other catalytic reactions. However, with the gradual depletion of oil resources and the continuous decline in oil quality, the diffusion of macromolecular heavy oil in the pores of microporous USY molecular sieves has been severely restricted. Although the ultra-stable Y molecular sieve can form certain Secondary pores, but these secondary pores are not abundant, and the connectivity between each other is poor, it is difficult to meet the cracking requirements of macromolecular heavy oil. [0003] Al...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J32/00B01J29/16C10G49/08
Inventor 牛国兴黄曜贾立夏赵东元
Owner FUDAN UNIV
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