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Preparation method of beta zeolite with multilevel pore canals

A technology of beta zeolite and channels, which is applied in the field of preparation of multi-stage channel beta zeolite, can solve the problems of complex preparation process, high price, and difficulty in industrial scale application, and achieve easy scale-up production, saving dosage, and adjustable silicon-aluminum ratio Effect

Inactive Publication Date: 2013-09-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these examples, a notable feature is the use of mesoscopic templates such as mesoporous carbons, polymers, organosilanes, and inorganic nanoparticles in the process of synthesizing zeolites. Complex and difficult to implement on an industrial scale

Method used

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  • Preparation method of beta zeolite with multilevel pore canals
  • Preparation method of beta zeolite with multilevel pore canals
  • Preparation method of beta zeolite with multilevel pore canals

Examples

Experimental program
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Effect test

example 1

[0025] 1. Take 32.19 grams of ethyl orthosilicate (28% SiO 2 ), 35.34 grams of tetraethylammonium hydride (25% aqueous solution) and 0.96 grams of sodium hydroxide were stirred at room temperature to obtain a homogeneous solution.

[0026] 2. Take 2 grams of aluminum sulfate octadecahydrate completely dissolved in 20ml of deionized water, add dropwise to the homogeneous solution obtained in 1 while stirring, and stir at a constant temperature of 80°C until a dry gel is obtained.

[0027] 3. Transfer the obtained xerogel into a 100m1 hydrothermal kettle and heat it at 140°C for 48 hours, then cool, dry, add 2.4 grams of silane coupling agent (such as vinyltrimethoxysilane, etc.) In the mixture, stir evenly and transfer to a petri dish to dry.

[0028] 4. Move the dried solid into a 100m1 hydrothermal kettle and heat it at 140°C for 72 hours, then cool, filter, wash, dry, and roast to obtain SiO 2 / Al 2 o 3 50 zeolite with hierarchical channels.

example 2

[0030] 1. Take 32.19 grams of ethyl orthosilicate (28% SiO 2 ), 55.2 grams of tetraethylammonium hydroxide (20% aqueous solution) and 0.96 grams of sodium hydroxide were stirred at room temperature to obtain a homogeneous solution.

[0031] 2. Take 0.40 g of aluminum chloride and completely dissolve it in 20 ml of deionized water, add it dropwise into the homogeneous solution obtained in 1 while stirring, and stir at a constant temperature of 80°C until a xerogel is obtained.

[0032] 3. Transfer the obtained xerogel into a 100ml hydrothermal kettle and heat it at 140°C for 48 hours, then cool, dry, and add 2.6 grams of silane coupling agent (such as vinyltrimethoxysilane) and an appropriate amount of ethanol to uniformly In the mixture, stir evenly and transfer to a petri dish to dry.

[0033] 4. Transfer the dried solid into a 100ml hydrothermal kettle and heat it at 140°C for 72 hours, then cool, filter, wash, dry, and roast to obtain SiO 2 / Al 2 0 3 100 zeolite with hi...

example 3

[0035] 1. Get 32.19 grams of silica sol (28% SiO 2 , Shanghai Hengsheng Chemical Industry), 35.34 grams of tetraethylammonium hydroxide (25% aqueous solution) and 0.96 grams of sodium hydroxide, stirred at room temperature to obtain a homogeneous solution.

[0036] 2. Take 0.25 g of aluminum sulfate octadecahydrate and completely dissolve it in 20 ml of deionized water, and add it dropwise to the homogeneous solution obtained in 1 while stirring. After continuing to stir for 2 hours, stir at a constant temperature of 80° C. until a dry gel is obtained.

[0037] 3. Transfer the obtained dry gel into a 100ml hydrothermal kettle and heat it at 140°C for 48 hours, then cool, dry, add 2.6 grams of silane coupling agent (such as vinyltrimethoxysilane) and mix evenly with appropriate amount of ethanol solution, stirred evenly and then transferred to a Petri dish to dry.

[0038] 4. Transfer the dried solid into a 100ml hydrothermal kettle and heat it at 140°C for 72 hours, then coo...

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Abstract

A preparation method of beta zeolite with multilevel pore canals is disclosed by the invention, and comprises: uniformly mixing a silicon source, a tetraethylammonium hydroxide solution, sodium hydroxide and a complete dissolved aluminium source, stirring at a certain constant temperature, and forming a xerogel; carrying out a first hydrothermal treatment for the obtained xerogel, cooling, grinding, and adding a proper amount of a silane coupling agent; and carrying out a second hydrothermal treatment, cooling, filtering, roasting, and obtaining the beta zeolite with multilevel pore canals. The preparation method and the post-processing method are simple, yield is high, and industrial amplification production is easy to realize.

Description

technical field [0001] The invention relates to a method for preparing zeolite with both micropores and mesoporous channels, in particular to synthesizing nanoscale multi-level channel beta zeolite through a solid-phase crystallization method. Background technique [0002] As one of the five major zeolites, β has important industrial application value. It is a zeolite with strong acidity and a three-dimensional 12-membered ring structure. Because it has a three-dimensional macroporous structure and has both acid catalytic properties and reaction selectivity, it has a wide range of applications in petrochemical and fine chemical industries, and shows excellent catalytic performance in many catalytic reactions. [0003] Although traditional molecular sieves have many unique advantages, most of their pores are between 0.5 and 1.3nm, which belong to microporous materials (<2nm). For molecules whose molecular size is larger than their pore diameter, it is often difficult to e...

Claims

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Application Information

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IPC IPC(8): C01B39/04
Inventor 周兴贵陈娇朱卡克
Owner EAST CHINA UNIV OF SCI & TECH
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