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Multi-orifice zeolite material as well as preparation method and application thereof

A zeolite material and a technology for pore zeolite are applied in the field of preparing multi-level pore zeolite materials and achieve the effects of simple and easy preparation process, simplified synthesis process and good catalytic activity

Inactive Publication Date: 2012-11-28
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the hydrophobicity of carbon materials, complex surface treatments are generally required to strengthen their combination with zeolite precursors before use.

Method used

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  • Multi-orifice zeolite material as well as preparation method and application thereof
  • Multi-orifice zeolite material as well as preparation method and application thereof
  • Multi-orifice zeolite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] a) Preparation of reaction precursor: at 40°C, add 0.2g of aluminum isopropoxide and 10.4g of ethyl silicate to 18g of water, stir at room temperature for 2h, then dropwise add 4.1g of 25wt% tetrapropylammonium hydroxide aqueous solution;

[0043] b) After 4 hours, add 0.69 g of sucrose to the mixture obtained in a), continue to stir overnight until the reaction mixture becomes solidified, age for 7 hours, and dry in a constant temperature and humidity box at 50°C for 15 hours;

[0044] c) inject 0.12g of water into the bottom of the 100ml polytetrafluoroethylene liner containing the small metal bracket, take 1g of dry glue in b) and place it on the support of the polytetrafluoroethylene liner in the crucible, put it in a stainless steel kettle, At 150°C, steam assisted crystallization treatment for 10h. ;

[0045] d) The crystallized powder above is washed three times with deionized water and absolute ethanol, dried at 100°C under normal pressure for 10 hours, and fi...

Embodiment 2

[0052] The only difference between this example and Example 1 is that the water content used in the steam-assisted crystallization process is 0.08 g. All the other contents are the same as those described in Example 1.

[0053] The structural parameter data of the prepared hierarchically porous zeolite materials are shown in Table 1.

[0054] The XRD spectrum of the prepared hierarchically porous zeolite material is as follows Figure 5 As shown in A.

[0055] The nitrogen adsorption-desorption isotherm curve and pore size spectrum of the prepared hierarchically porous zeolite material are as follows: Figure 6a and 6b Shown in curve A.

Embodiment 3

[0057] The only difference between this example and Example 1 is that the water content used in the steam-assisted crystallization process is 0.15 g. All the other contents are the same as those described in Example 1.

[0058] The structural parameter data of the prepared hierarchically porous zeolite materials are shown in Table 1.

[0059] The XRD spectrum of the prepared hierarchically porous zeolite material is as follows Figure 5 Shown in B.

[0060] The nitrogen adsorption-desorption isotherm curve and pore size spectrum of the prepared hierarchically porous zeolite material are as follows: Figure 6a and 6b Shown in curve B.

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Abstract

The invention provides a multi-orifice zeolite material as well as a preparation method and an application thereof. The preparation method comprises the following steps of: adding cane sugar into a reaction precursor liquid system containing a silicon source, an aluminum source and a structure guiding agent, stirring till a reaction mixture forms a solidified reaction body, aging, and drying to obtain dry gel; carrying out steam auxiliary crystallization treatment on the dry gel to obtain crystallized powder; and burning the powder to remove a carbon material template to obtain the multi-orifice zeolite material. According to the preparation method disclosed by the invention, a synthesizing process is simple, convenient and feasible, a mesoporous template is generated in situ by a cheap reproducible carbon source in a zeolite crystalline process without special treatment, the synthesis cost is saved, and the synthesis process is simplified.

Description

technical field [0001] The invention relates to a method for preparing a hierarchically porous zeolite material, which involves using a method of in-situ hydrothermal carbonization of sucrose during zeolite crystallization to form a mesoporous template, and a one-step steam-assisted crystallization method to prepare a hierarchically porous zeolite material with excellent performance The method belongs to the technical field of molecular sieve materials. Background technique [0002] As we all know, zeolite is a kind of material with regular and uniform micropore structure. Due to its large specific surface area, shape selectivity and inherent acidity, it is widely used in adsorption separation, ion exchange and catalytic industries. In recent years, researchers have developed applications in emerging industries such as biomedicine, electronics, and sensor technology. However, the small pore size of zeolites (generally less than 2 nanometers) usually hinders the transmission...

Claims

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Application Information

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IPC IPC(8): C01B39/04B01J29/06C07C49/84C07C45/46
Inventor 宋禹奠华子乐施剑林朱颜周晓霞
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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