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Method for synchronizing mesoporous heteroatom molecular sieves by means of photo-induced self-assembly

A heteroatom molecular sieve and self-assembly technology, applied in molecular sieves and base exchange compounds, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., can solve the problems of limited metal elements, difficult promotion, cumbersome synthesis operations, etc., to achieve The effect of adjustable reaction time, fast curing rate and controllable light parameters

Active Publication Date: 2018-05-15
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the chelating agent is complicated, the synthesis operation is cumbersome, and the applicable metal elements are limited, so it is difficult to be extended to the synthesis of other mesoporous heteroatom molecular sieve membranes.

Method used

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  • Method for synchronizing mesoporous heteroatom molecular sieves by means of photo-induced self-assembly
  • Method for synchronizing mesoporous heteroatom molecular sieves by means of photo-induced self-assembly
  • Method for synchronizing mesoporous heteroatom molecular sieves by means of photo-induced self-assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0023] Mix and stir 25 g of tetrabutyl titanate stabilized with acetylacetone, 1000 g of tetraethyl silicate, 100 g of P123 and 10 g of Irgacure 103 to obtain a coating solution;

[0024] Under the condition of ambient humidity of 30-90%, apply the above-mentioned coating solution evenly on the porous ceramic substrate to form a liquid film, and the final thickness of the liquid film is controlled at 1-50 μm;

[0025] Use ultraviolet light with a wavelength of 350nm and an intensity of 50% to irradiate the liquid film coated on the substrate for photoreaction for 30 minutes, so that Irgacure 103 is decomposed, and a mesoporous heteroatom molecular sieve membrane containing template agent P123 is obtained;

[0026] Finally, the ultraviolet radiation with a wavelength of 350nm and an intensity of 80% was used to calcine for 60 minutes to remove the template agent P123 and obtain a mesoporous titanium-silicon molecular sieve membrane.

[0027] like figure 1 As shown, the mesopor...

Embodiment approach 2

[0029] Mix and stir 25 g of tetrabutyl titanate stabilized with acetylacetone, 1000 g of tetraethyl silicate, 250 g of P123 and 25 g of Irgacure 103 to obtain a coating solution;

[0030]Under the condition of ambient humidity of 30-90%, apply the above-mentioned coating solution evenly on the porous ceramic substrate to form a liquid film, and the final thickness of the liquid film is controlled at 1-50 μm;

[0031] Use ultraviolet light with a wavelength of 390nm and an intensity of 20% to irradiate the liquid film applied on the substrate for photoreaction for 20 minutes, so that Irgacure 103 is decomposed, and a mesoporous heteroatom molecular sieve membrane containing template agent P123 is obtained;

[0032] Using ultraviolet radiation with a wavelength of 350nm and an intensity of 50% to calcine for 100min, remove the template agent P123, and obtain a mesoporous titanium-silicon molecular sieve membrane.

Embodiment approach 3

[0034] Mix and stir 25 g of tetrabutyl titanate stabilized with acetylacetone, 1000 g of tetraethyl silicate, 500 g of P123 and 50 g of Irgacure 103 to obtain a coating solution;

[0035] Under the condition of ambient humidity of 30-90%, apply the above-mentioned coating solution evenly on the porous ceramic substrate to form a liquid film, and the final thickness of the liquid film is controlled at 1-50 μm;

[0036] Use ultraviolet light with a wavelength of 420nm and an intensity of 90% to irradiate the liquid film coated on the substrate for photoreaction for 10 minutes, so that Irgacure 103 is decomposed, and a mesoporous heteroatom molecular sieve membrane containing template agent P123 is obtained;

[0037] Using ultraviolet radiation with a wavelength of 350nm and an intensity of 90% to calcine for 120min, remove the template agent P123, and obtain a mesoporous titanium-silicon molecular sieve membrane.

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Abstract

The invention relates to the field of mesoporous heteroatom molecular sieve membrane synthesis, and discloses a method for synchronizing mesoporous heteroatom molecular sieves by means of photo-induced self-assembly. The method includes uniformly mixing and stirring transition metal precursors, silicon sources, template agents and photo-acid generators PAG with one another to obtain membrane coating solution; uniformly smearing the membrane coating solution on substrates to form liquid membranes; allowing ultraviolet light with the wavelength of 350-420 nm and the intensity of 10-100% to irradiate on the liquid membranes so as to obtain mesoporous heteroatom molecular sieve membranes with the template agents; allowing ultraviolet light with the wavelength of 350 nm and the intensity of 50-100% to irradiate on the mesoporous heteroatom molecular sieve membranes for 60-120 min and removing the template agents to obtain mesoporous heteroatom molecular sieve membranes. The method has the advantages that the method is high in curing rate and free of solvents, and energy can be saved; the reaction time can be adjusted, optical parameters can be controlled, the membrane coating solution can keep stable under non-illumination conditions, and the method is an efficient, controllable and green preparation technology.

Description

technical field [0001] The invention relates to the technical field of preparation of molecular sieves, in particular to a method for synthesizing mesoporous heteroatom molecular sieves by light-induced self-assembly. Background technique [0002] Oxidation reaction is one of the most frequently used catalytic processes in chemical production, and more than 50% of chemical synthesis is related to it, the most representative of which is alkane oxidation reaction. Alkanes have a wide range of sources and low cost, but the C-H bond and C-C bond energy are too high, the target product is often more active than the raw material, and it is easy to cause problems such as high energy consumption, low raw material utilization rate, and serious environmental pollution due to excessive oxidation. For example, the target products of the selective oxidation reaction of cyclohexane are cyclohexanol and cyclohexanone. However, under the existing catalytic system, it is difficult to contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/08
CPCC01B39/085C01P2006/17
Inventor 吴妹李爽张鹏宇王玉琪刘鹏倪伶俐陈静许晨红蒋金龙
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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