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Mesoporous molecular sieve containing Y-zeolite secondary constitutional unit and preparing method thereof

A technology of secondary structural units and mesoporous molecular sieves, applied in molecular sieves and base exchange compounds, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., to achieve improved amorphous structure characteristics, good catalytic performance, and increased acid content Effect

Inactive Publication Date: 2008-10-22
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But up to now, the report of this kind of synthetic method is all limited to using single surfactant as template to synthesize corresponding MCM-41 or MCM-48, and there is no report using mixed surfactant as template

Method used

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  • Mesoporous molecular sieve containing Y-zeolite secondary constitutional unit and preparing method thereof
  • Mesoporous molecular sieve containing Y-zeolite secondary constitutional unit and preparing method thereof
  • Mesoporous molecular sieve containing Y-zeolite secondary constitutional unit and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Dissolve 0.357g of sodium hydroxide and 0.243g of sodium metaaluminate in 4ml of deionized water, stir and clarify, then add 5ml of homemade sodium silicate solution (SiO 2 25.4%, Na 2 O 7.4%), stirred evenly, put into a sealed polypropylene container, stirred and reacted at 90°C for 18h. The above pretreated sol was dropped into the mixed aqueous solution of CTAB and SL, and the molar composition of the synthetic mixture was: SiO 2 : 0.06 Al 2 o 3 : 0.072CTAB : 0.012SL : 58H 2 O. Then adjust the pH to 11.3 with dilute sulfuric acid, and crystallize at 100°C for 72h. The product was suction filtered, washed, and dried at 80°C to obtain SBU-MCM-41 mesoporous molecular sieve (Si / Al=9).

Embodiment 2

[0029] Take by weighing 0357 sodium hydroxide and 0243g sodium metaaluminate, dissolve completely with 4ml deionized water, add 5ml homemade sodium silicate solution (SiO 2 25.4%, Na 2 O 7.4%), stirred evenly, put into a sealed polypropylene container, stirred and reacted at 120° C. for 9 h. The above pretreated sol is dropped into the mixed aqueous solution of CTAB and SL, and the molar composition of the synthetic mixture is: SiO 2 : 0.06 Al 2 o 3: 0.22 CTAB : 0.015SL : 98H 2 O. Then adjust the pH to 10.8 with dilute sulfuric acid, and crystallize at 120°C for 40h. The product was suction filtered, washed, and dried at 80°C to obtain SBU-MCM-41 mesoporous molecular sieve (Si / Al=9).

Embodiment 3

[0031] Dissolve 0.179g of sodium hydroxide and 0.122g of sodium metaaluminate in 2ml of deionized water, stir and clarify, then add 2.5ml of homemade sodium silicate solution (SiO 2 25.4%, Na 2 O 7.4%), stirred evenly, put into a sealed polypropylene container, stirred and reacted at 100°C for 12h. Add 2.4 ml of sodium silicate solution to the obtained sol, and continue stirring at 100° C. for 12 h. The above pretreated sol is dropped into the mixed aqueous solution of CTAB and SL, and the molar composition of the synthetic mixture is: SiO 2 : 0.028 Al 2 o 3 : 0.16CTAB : 0.013SL : 95H 2 O. Then the pH was adjusted to 11.0 with dilute hydrochloric acid, crystallized at 120°C for 48 h, the product was suction filtered, washed, and dried at 80°C to obtain SBU-MCM-41 mesoporous molecular sieve (Si / Al=18).

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Abstract

The invention is a new catalysis material and the manufacturing method for inter-hole molecular sieve containing gamma zeolite secondary unit. The invention carries on preprocess to the composition, then the obtained inorganic precursor is assembled by using basic ion and negative ion surface active agent as template agent. Introduces the secondary unit of gamma zeolite into inter hole molecular sieve frame, and designs the SBU-MCM-41 compound molecular sieve with different silicon-aluminum ratio. The invention reduces the quantity of surface active agent, it's easy to operate, and the material has a high water and heat stability and excellent catalysis performance.

Description

technical field [0001] The invention relates to a kind of mesoporous molecular sieve catalytic material which uses a mixed cation-anion surfactant as a template to synthesize a Y zeolite secondary structure unit and a preparation method thereof. Background technique [0002] Since the researchers of Mobil Corporation synthesized M41S series mesoporous molecular sieves by using supramolecular self-assembly of surfactants in 1992, MCM-41 and MCM-48 mesoporous materials have been known for their adjustable and regular channels, large specific surface area and good The thermal stability and other characteristics have become a hot topic in the research of catalytic materials. However, compared with traditional microporous zeolite molecular sieves, there are obvious differences in the framework structure of mesoporous molecular sieves. Mesoporous molecular sieves do not have repeating unit cell structural units in microporous zeolites, and their internal unit structures are simil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/48C01B39/24
Inventor 刘苏孔令东李全芝
Owner FUDAN UNIV
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