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Silicon-based mesoporous molecular sieve and preparation method thereof

A silicon-based mesoporous and molecular sieve technology, applied in the chemical field, can solve the problem of low order degree of silicon-based mesoporous materials, and achieve the effect of promoting order degree

Inactive Publication Date: 2015-03-18
BEIJING UNIV OF AGRI
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Problems solved by technology

The use of auxiliary templates to synthesize mesoporous molecular sieves has also been reported in the literature. The auxiliary templates include triethylamine and tetramethyl(ethyl)ammonium hydroxide, etc., but the synthesized silicon-based mesoporous materials have a low degree of order.

Method used

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  • Silicon-based mesoporous molecular sieve and preparation method thereof
  • Silicon-based mesoporous molecular sieve and preparation method thereof
  • Silicon-based mesoporous molecular sieve and preparation method thereof

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preparation example Construction

[0043] One embodiment of the present invention provides a method for preparing a silicon-based mesoporous molecular sieve as described in any one of the above, comprising:

[0044] Weigh raw materials according to the addition ratio of raw materials;

[0045] Mix absolute ethanol and deionized water to prepare the first mixed solution;

[0046] Adding a quaternary ammonium salt type cationic surfactant to the first mixed solution to prepare a second mixed solution;

[0047] Adding EDTA to the second mixed solution to prepare a third mixed solution;

[0048] Add ammonia water to the third mixed solution to prepare a fourth mixed solution;

[0049] Ethyl orthosilicate is added into the fourth mixed solution to prepare a silicon-based mesoporous molecular sieve.

[0050] 1. Disodium ethylenediaminetetraacetic acid (EDTA) can interact with quaternary ammonium cationic surfactant (CTAB), tetraethyl orthosilicate, etc. Therefore, it overcomes the template self-sufficiency of Si-O...

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Abstract

The invention relates to the chemical field, and in particular relates to a silicon-based mesoporous molecular sieve and a preparation method thereof. The silicon-based mesoporous molecular sieve comprises the following ingredients: in amount of substance, 0-120mol of absolute ethyl alcohol, 70-400mol of deionized water, 0.1-0.35mol of quaternary ammonium type cationic surfactant, 0.05-0.40mol of Ethylene diamine tetraacetic acid disodium salt, and 2-7mole of ammonia water by taking silicon source as 1mol, wherein the silicon source is tetraethoxysilane. The silicon-based mesoporous molecular sieve with high orderliness and smaller particle size can be obtained.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a silicon-based mesoporous molecular sieve and a preparation method thereof. Background technique [0002] Existing methods for synthesizing silicon-based mesoporous molecular sieves include the sol-gel method. There are many reports on room temperature synthesis using the sol-gel method. Under the action of the micelle template, the silicon source is controlled to hydrolyze the tissue, and the silicon-based mesoporous molecular sieve material is obtained. Mesoporous molecular sieves synthesized at room temperature are mostly MCM-41 and MCM-48. The use of auxiliary templates to synthesize mesoporous molecular sieves has also been reported in the literature. The auxiliary templates include triethylamine and tetramethyl(ethyl)ammonium hydroxide, etc., but the synthesized silicon-based mesoporous materials have a low degree of order. Contents of the invention [0003] The invention prov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/00C01B37/02
Inventor 郑燕英崔丹枫王惠川赵建庄王玉辞
Owner BEIJING UNIV OF AGRI
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