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Method for preparing mesopore solid alkali and mesopore functional material

A technology of functional materials and solid bases, applied in chemical instruments and methods, molecular sieves and base exchange compounds, inorganic chemistry, etc., can solve problems such as environmental pollution, large energy consumption and time consumption

Inactive Publication Date: 2005-06-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modification of molecular sieves has always followed the traditional "post-treatment" process idea, that is, the main body of molecular sieves must be synthesized first, and then various methods such as solution impregnation, ion exchange, microwave dispersion, gas phase or liquid phase chemical deposition, etc. are used to load the object substances. Not only will it consume a lot of energy and time, but it will also cause additional pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1. the synthesis of mesoporous solid base, functional material

[0020] At room temperature, a certain amount of magnesium acetate is completely dissolved in 15g H 2 O, at the same time 2g P123 (EO 20 PO 70 EO 20 ) was dissolved in 60g of 2M HCl. After the two solutions were mixed, 4.25g of tetraethyl orthosilicate (TEOS) was slowly added while stirring at 25°C. Stirring was continued at 25°C for 24h, and then stood at 80°C for 24h. After taking it out, the liquid in the mixture was evaporated to dryness at 80°C, and the obtained white sample was dried at 80°C and then calcined. The product was calcined at 500°C for 1 h in a nitrogen stream, and then calcined at 500°C for 5 h in an air stream. The obtained sample was recorded as X%MgO / SBA, where X represents the percentage of MgO in the sample. Under different MgO loads, the ratio of the amount of substances in the synthetic system is as follows:

[0021] 10%: 1 TEOS: 0.02 P123: 6 HCl: 0.2 Mg(OAC)...

Embodiment 2

[0042] Embodiment 2. the synthesis of mesoporous solid base, functional material

[0043] At room temperature, a certain amount of copper nitrate is completely dissolved in 15g H 2 O, at the same time 2g P123 (EO 20 PO 70 EO 20 ) was dissolved in 60g of 2M HCl, and after the two solutions were mixed, 4.25g of tetraethyl orthosilicate was slowly added while stirring at 50°C, and the stirring was continued at 50°C for 24h, and then left to stand in a closed container at 100°C for 24h. After taking it out, the liquid in the mixture was evaporated to dryness at 80°C, and the obtained white sample was dried at 80°C and then calcined to obtain a taupe synthetic product. The obtained product was first calcined at 550% in a nitrogen stream for 1 h, and then calcined at 550° C. in an air stream for 5 h. The obtained samples were recorded as X% CuO / SBA, where X=1, 3, 5 and 10.

[0044] 1%: 1 TEOS: 0.02 P123: 6 HCl: 0.008Cu(NO 3 ) 2 : 192 H 2 O;

[0045] 3%: 1 TEOS: 0.0...

Embodiment 3

[0058] Embodiment 3. the synthesis of mesoporous solid base, functional material

[0059] At room temperature, a certain amount of zinc acetate is completely dissolved in 15g H 2 O, while 2g P123 (EO 20 PO 70 EO 20 ) was dissolved in 60g of 2M HCl. After the two solutions were mixed, 4.25g of tetraethyl orthosilicate was slowly added while stirring at 50°C. Stirring was continued at 50°C for 24h, and then stood at 100°C for 24h. After taking it out, the liquid in the mixture was evaporated to dryness at 80°C, and the obtained white sample was dried at 80°C and then calcined; the product was first calcined at 600°C for 1 h in a nitrogen stream, and then calcined at 600°C for 5 h in an air stream, and the obtained white The sample is recorded as X%ZnO / SBA, X=1,3,5.

[0060] 1%: 1 TEOS: 0.02 P123: 6 HCl: 0.007 Zn (OAC) 2 : 192 H 2 O;

[0061] 3%: 1 TEOS: 0.02 P123: 6 HCl: 0.022Zn (OAC) 2 : 192 H 2 O;

[0062] 5%: 1 TEOS: 0.02 P123: 6 HCl: 0.037Zn (O...

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Abstract

A mesoporous solid alkali and functional material, characterized by mesoporous silicon molecular sieves containing rare earth metal or transition metal atoms, with a pore diameter of 4-10 nm, and a mesoporous silicon molecular sieve with an alkali strength of 9.3-22.5. The mesoporous solid base and functional material of the invention can be used as shredded tobacco additives for reducing the content of nitrosamines in cigarette smoke. After adding the mesoporous solid alkali and functional material of the invention to shredded tobacco, the total content of nitroso compounds in the smoldering smoke of cigarettes is reduced by 30-47%. The invention discloses its preparation method.

Description

1. Technical field [0001] The invention relates to functional mesoporous molecular sieve materials. 2. Background technology [0002] Mesoporous molecular sieves have shown attractive application prospects in the fields of heterogeneous catalysis, supramolecular assembly, molecular separation, and photoelectric technology. As a new type of mesoporous material, SBA-15 has the advantages of large pore size, high specific surface area, and good hydrothermal stability, and has gradually become the focus of mesoporous material applications in recent years. However, due to the lack of acid-base sites on the surface of mesoporous silica molecular sieves such as SBA-15, they must be modified when used as catalysts or adsorbents, that is, the introduction of various functional guest substances such as metals or nonmetals and their compounds to modulate The surface properties of molecular sieves are what give them the desired adsorption / catalysis properties. However, the modificatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J29/00C01B39/00
Inventor 朱建华王英魏一伦徐杨王一萌吴正颖
Owner NANJING UNIV
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