Hierarchical porous silica-alumina zeolite molecular sieve, synthetic method and application of hierarchical porous silica-alumina zeolite molecular sieve

A technology of silica-alumina zeolite and synthesis method, which is applied in the direction of crystalline aluminosilicate zeolite, molecular sieve catalyst, chemical instrument and method, etc., can solve the problems of expensive, complicated process flow, and the feasibility of large-scale production scale-up, etc., Achieve high acidity, high hydrothermal stability, good catalytic performance and stability

Inactive Publication Date: 2016-02-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The methods involved in these reports all use relatively expensive raw materials and relatively complicated technological processes, and do not have the feasibility of large-scale production and scale-up

Method used

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  • Hierarchical porous silica-alumina zeolite molecular sieve, synthetic method and application of hierarchical porous silica-alumina zeolite molecular sieve
  • Hierarchical porous silica-alumina zeolite molecular sieve, synthetic method and application of hierarchical porous silica-alumina zeolite molecular sieve
  • Hierarchical porous silica-alumina zeolite molecular sieve, synthetic method and application of hierarchical porous silica-alumina zeolite molecular sieve

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add an aqueous solution containing 448g of sucrose to 128g of white carbon black, immerse in equal volume at room temperature for 8 hours, and then carbonize in a tube furnace with dry high-purity nitrogen after drying. The carbonization temperature is 750°C and the carbonization time is After 6 hours, the silicon carbide source sample A was obtained, and its SiO 2 The content is 40%.

[0039]Weigh 26.20g of silicon carbide source A, add 61.58g of water and 2.10g of sodium hydroxide, stir at 50°C for 3 hours, then add 1.94g of aluminum sulfate and 7.80g of template agent hexamethyleneimine in sequence, and the material is gelled Formulation for SiO 2 :0.0286Al 2 o 3 :0.10Na 2 O:20.0H 2 O: 0.45 hexamethyleneimine. The crystallization process was carried out in a 100mL crystallization kettle, the crystallization temperature was 175°C, the crystallization time was 48 hours, and the crystallization mode was dynamic. The crystallized product is prepared after washing,...

Embodiment 2

[0042] Weigh 26.20g of silicon carbide source A, add 36.57g of water and 2.38g of sodium hydroxide, stir at 50°C for 3 hours, then add 4.66g of aluminum sulfate and 5.20g of templating agent hexamethyleneimine in sequence, and the material is gelled Formulation for SiO 2 :0.040Al 2 o 3 :0.05Na 2 O:12.5H 2 O: 0.30 hexamethyleneimine. The crystallization process was carried out in a 100mL crystallization kettle, the crystallization temperature was 175°C, the crystallization time was 48 hours, and the crystallization mode was dynamic. The crystallized product is prepared after washing, drying and roasting, and the number is 2. In terms of specific surface area percentage, the proportion of mesopores (2nm≤pore diameter<100nm) is 57%, and the proportion of micropores (0.5nm<pore diameter<2nm) is 43%.

Embodiment 3

[0044] Weigh 26.20g of silicon carbide source A, add 38.115g of water and 1.40g of sodium hydroxide, stir at 50°C for 3 hours, then add 1.94g of aluminum sulfate and 6.69g of templating agent hexahydropyridine in sequence, and the gelling formula of the material is SiO 2 :0.0167Al 2 o 3 :0.05Na 2 O:12.5H 2 O: 0.45 hexahydropyridine. The crystallization process was carried out in a 100mL crystallization kettle, the crystallization temperature was 175°C, the crystallization time was 48 hours, and the crystallization mode was dynamic. The crystallized product is prepared after washing, drying and roasting, and the number is 3. In terms of specific surface area percentage, the proportion of mesopores (2nm≤pore diameter<100nm) is 63%, and the proportion of micropores (0.5nm<pore diameter<2nm) is 37%.

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Abstract

The invention relates to a hierarchical porous silica-alumina zeolite molecular sieve, a synthetic method and application of the hierarchical porous silica-alumina zeolite molecular sieve. The hierarchical porous silica-alumina zeolite molecular sieve has both nanoscale mesopores and micropores, wherein calculated by specific surface area percentage, the mesopores with the pore diameter of 2-100 nanometers account for 50-75%, and the micropores with the pore diameter of 0.5-2 nanometers but unequal to 2 nanometers account for 25-50%, so that the hierarchical porous silica-alumina zeolite molecular sieve can be used in the liquid phase alkylation reaction of benzene and alkene.

Description

technical field [0001] The invention relates to a multi-stage pore silica-alumina zeolite molecular sieve, a synthesis method and an application thereof. Background technique [0002] Hierarchical zeolites are a kind of zeolite molecular sieves with both microporous structure and mesoporous structure. qualitative performance. The existing reports include: multi-stage channel beta zeolite (CN200410050727.7, CN200610001332.7), ZSM-5 (CN200610001333.1, CN201210011147.1), TS-1 (CN200510130858.0, CN201010501473.1) SAPO-11 (CN201010262190.6, CN201010262205.9), etc. The methods involved in these reports all use relatively expensive raw materials and relatively complicated technological processes, and do not have the feasibility of large-scale production and scale-up. [0003] MWW is the general term for a series of molecular sieve structures named by the International Molecular Sieve Association (IZA), and its silicon-alumina forms include MCM-22, MCM-36, MCM-49, MCM-56, ITQ-1, ...

Claims

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Application Information

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IPC IPC(8): C01B39/04B01J29/06C07C2/66C07C15/02C07C15/073
Inventor 沈震浩孙洪敏宦明耀张斌薛明伟王振东杨为民
Owner CHINA PETROLEUM & CHEM CORP
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